CN116952030A - Waste heat recovery device, system and method for indoor test bed of aero-engine - Google Patents
Waste heat recovery device, system and method for indoor test bed of aero-engine Download PDFInfo
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- CN116952030A CN116952030A CN202310825820.3A CN202310825820A CN116952030A CN 116952030 A CN116952030 A CN 116952030A CN 202310825820 A CN202310825820 A CN 202310825820A CN 116952030 A CN116952030 A CN 116952030A
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- 238000012360 testing method Methods 0.000 title claims abstract description 146
- 238000011084 recovery Methods 0.000 title claims abstract description 136
- 239000002918 waste heat Substances 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 219
- 238000002347 injection Methods 0.000 claims abstract description 99
- 239000007924 injection Substances 0.000 claims abstract description 99
- 238000001704 evaporation Methods 0.000 claims abstract description 34
- 230000008020 evaporation Effects 0.000 claims abstract description 31
- 238000009833 condensation Methods 0.000 claims abstract description 29
- 230000005494 condensation Effects 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 51
- 239000007789 gas Substances 0.000 claims description 34
- 238000009826 distribution Methods 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
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- 238000013507 mapping Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/06—Control arrangements therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The embodiment of the application discloses a waste heat recovery device, a system and a method of an indoor test bed of an aero-engine, wherein the waste heat recovery device comprises: a plurality of annular cold water pipelines are arranged on the outer wall surface of the injection cylinder at intervals along the axial direction of the injection cylinder, and a plurality of I-shaped heat pipes are arranged in the annular cold water pipelines along the circumferential direction; each I-shaped heat pipe comprises an evaporation end, a condensation end and a heat insulation section, wherein the evaporation end is arranged as an arc section, the evaporation end positioned on the inner side is attached to the outer side wall surface of the injection cylinder, the condensation end positioned on the outer side is attached to the inner side wall surface of the annular cold water pipeline at the corresponding installation position, and the injection cylinder and the annular cold water pipeline form heat exchange through the I-shaped heat pipe so as to recover the heat energy exhausted in the injection cylinder. The technical scheme provided by the embodiment of the application solves the problem of waste heat recovery of the indoor test bed of the aero-engine, improves the energy utilization rate of the indoor test bed of the aero-engine, has higher practicability and advancement, and can be widely applied to the indoor test bed of the aero-engine.
Description
Technical Field
The application relates to the technical field of indoor test run of an aeroengine and the technical field of heat recovery, in particular to a waste heat recovery device, a system and a method of an indoor test run platform of the aeroengine.
Background
Waste heat is defined as energy that is underutilized and not utilized in human production and life. With the gradual enhancement of the awareness of energy conservation and emission reduction, waste heat recycling becomes a hot spot for research in various industries. Waste heat generated in industries such as steel, petroleum, chemical industry and the like has been largely studied and utilized in an actual process. At present, common waste heat recovery methods mainly comprise a heat exchanger and a heat pump. The heat exchanger is a device for transferring heat of a high-temperature fluid to a low-temperature fluid to recover heat energy. A heat pump is a device that consumes a portion of the mechanical work to transfer heat from a low temperature heat source to a high temperature heat source through an inverse carnot cycle.
Aeroengine test run is an important link for verifying engine performance and safety, and a large amount of waste heat can be generated in the test run process. However, because the test run state of the aero-engine is complex, the exhaust flow and the temperature under each test run working condition are very different; and the indoor test bed has high requirements on aerodynamic resistance and noise control of exhaust. At present, waste heat recovery is not widely applied to an indoor test bed of an aeroengine, and a feasible technical scheme is lacking. Therefore, aiming at the characteristics of the test bed in the aero-engine room, an applicable and efficient waste heat recovery method is required to be developed so as to improve the energy utilization rate of the test bed.
Disclosure of Invention
The purpose of the application is that: in order to solve the technical problems, the embodiment of the application provides a waste heat recovery device, a system and a method for an indoor test bed of an aero-engine, which are used for solving the waste heat recovery problem of the indoor test bed of the aero-engine, improving the energy utilization rate of the indoor test bed of the aero-engine, having higher practicability and advancement and being widely applied to the indoor test bed of the aero-engine.
The technical scheme of the application is as follows: the embodiment of the application provides a waste heat recovery device of an aircraft engine indoor test bed, which is provided with an exhaust system, wherein the exhaust system is used for injecting normal-temperature gas in a test bed 1 by high-temperature and high-speed exhaust of an engine tail nozzle through an injection cylinder 3 positioned in an injection room 2, the temperature and the speed of the exhaust are reduced after injection and mixing, and the exhaust is discharged into an exhaust tower 4, and the waste heat recovery device comprises:
a plurality of annular cold water pipelines 9 are arranged on the outer wall surface of the injection cylinder 3 at intervals along the axial direction of the injection cylinder, a plurality of I-shaped heat pipes are arranged along the circumferential direction in an annular plane formed by each annular cold water pipeline 9 and the injection cylinder 3, and the annular cold water pipeline 9 is fixedly supported on the outer side of the cylinder wall of the injection cylinder 3 through the plurality of I-shaped heat pipes arranged along the circumferential direction;
each I-shaped heat pipe comprises an evaporation end 6 and a condensation end 8 which are arranged as arc sections, and an insulation section 7 which is used for communicating the evaporation end 6 and the condensation end 8, wherein a closed communication cavity formed by the evaporation end 6, the insulation section 7 and the condensation end 8 is filled with a liquid working medium positioned at the evaporation end 6;
after each I-shaped heat pipe is installed, the evaporation end 6 positioned at the inner side is attached to the outer side wall surface of the injection cylinder 3, the condensation end 8 positioned at the outer side is attached to the inner side wall surface of the annular cold water pipeline 9 at the corresponding installation position, and the I-shaped heat pipe is used for evaporating liquid working medium in the evaporation end 6 to form gas through heat energy in the injection cylinder 3, the gas passes through the heat insulation section 7 to the condensation end 8, and cold water flowing through the annular cold water pipeline 9 liquefies the gas in the condensation end 8 and returns to the evaporation end 6, so that heat exchange is formed between the gas and the annular cold water pipeline 9 to recover the heat energy exhausted in the injection cylinder 3.
Optionally, in the waste heat recovery device of the test bed in the aero-engine room as described above,
in the I-shaped heat pipe, the inner wall surface of the evaporation end 6 is provided with an arc-shaped surface along the installation circumferential direction and is attached to the outer side wall surface of the injection cylinder 3;
the outer wall surface of the condensation end 8 is concaved inwards along the installation circumference to form a semicircular groove, so that the inner annular wall surface of the annular cold water pipeline 9 is embedded into the semicircular groove.
Optionally, in the waste heat recovery device of the test bed in the aero-engine room as described above,
the axial arrangement positions of the plurality of annular cold water pipelines 9 in the injection cylinder 3 are as follows: according to the temperature distribution of the exhaust gas in the ejector cylinder 3;
the diameters of the rings of the plurality of annular cold water pipelines 9 which are axially and alternately arranged along the injection cylinder 3 are the same, or the diameters of the rings of the plurality of annular cold water pipelines 9 are different.
Optionally, in the waste heat recovery device of the test bed in the aero-engine room as described above,
the I-shaped heat pipe is arranged on the outer wall surface of the injection cylinder 3 in the following mode: the arrangement form of the I-shaped heat pipe is determined according to the temperature distribution of the exhaust gas in the injection cylinder 3, and comprises the following steps: the number of layout and the layout position.
Optionally, in the waste heat recovery device of the test bed in the aero-engine room as described above,
the waste heat recovery device is applied to heat recovery of the injection cylinder 3 with different exhaust temperature distribution by adjusting the arrangement quantity and arrangement positions of the I-shaped heat pipes and the length of the heat insulation section 7 in the I-shaped heat pipes.
The embodiment of the application also provides a waste heat recovery system of the aircraft engine indoor test bed, which comprises the following components: a waste heat recovery device as claimed in any one of the preceding claims, and at least one set of thermal circulation lines;
wherein, the thermal cycle pipeline includes: the water inlet pipeline is connected to the front end of the annular cold water pipeline 9, and the water outlet pipeline is connected to the rear end of the annular cold water pipeline 9; the water inlet pipeline is sequentially connected with an inlet switch valve 10, an inlet regulating valve 11, a filter 12, a circulating pump 13, a flowmeter and a temperature sensor, the water outlet pipeline is sequentially connected with a water outlet switch valve 14, an outlet regulating valve 17 and an outlet switch valve 18, the water outlet pipeline is provided with a backflow branch pipeline at the rear end of the water outlet switch valve 14, the other end of the backflow branch pipeline is connected to the water inlet pipeline between the inlet regulating valve 11 and the filter 12, and the backflow branch pipeline is sequentially connected with a branch regulating valve 15 and a branch switch valve 16;
the heat circulation pipeline is used for providing low-temperature water through the water inlet pipeline, the low-temperature water enters the annular cold water pipeline 9 after being pressurized by the circulation pump 13, the high-temperature water flows out after being subjected to heat exchange by the annular cold water pipeline 9 and the I-shaped heat pipe, part of the high-temperature water flows out through the water outlet pipeline to realize recovery, and the other part of the high-temperature water is mixed with the low-temperature water of the water inlet pipeline through the reflux branch pipeline to form a circulation loop.
Optionally, in the waste heat recovery system of the indoor test bed of the aero-engine, the test run test performed by the indoor test bed of the aero-engine has a plurality of test run conditions,
the waste heat recovery system adjusts the inlet cold water temperature of the annular cold water pipeline 9 by adjusting the opening degrees of the inlet adjusting valve 11 and the branch adjusting valve 15, thereby meeting the heat recovery requirement on the temperature of the outer wall surface of the injection cylinder 3 under different test running working conditions.
Optionally, in the waste heat recovery system of the test bed in the aircraft engine room as described above,
a plurality of annular cold water pipelines 9 in the waste heat recovery device are connected in parallel to a set of heat circulation pipelines; or alternatively, the process may be performed,
each annular cold water pipeline 9 in the waste heat recovery device is provided with a set of heat circulation pipelines respectively.
Optionally, in the waste heat recovery system of the test bed in the aero-engine room as described above, the waste heat recovery system further includes: a storage tank;
a storage tank is arranged between the rear end of the outlet switch valve 18 of the water outlet pipeline and the load, and is used for storing high-temperature water from the water outlet pipeline so as to enable the load to stably operate.
The embodiment of the application also provides a waste heat recovery method of the indoor test bed of the aero-engine, which is implemented by adopting the waste heat recovery system of the indoor test bed of the aero-engine, and comprises the following steps:
step 1, determining the arrangement number of annular cold water pipelines 9 and the axial arrangement positions of the annular cold water pipelines on the ejector cylinders 3 according to the temperature distribution of exhaust gas in the ejector cylinders 3 in an indoor test bed of the aeroengine;
step 2, based on CFD multiphase flow simulation of the I-shaped heat pipes, determining the length and the layout form of the heat insulation section 7 of the I-shaped heat pipes for performing waste heat recovery on the current test bed by comparing the I-shaped heat pipes of the heat insulation sections 7 with different lengths and comparing the layout forms of the I-shaped heat pipes including the layout quantity and the heat transfer efficiency at the layout positions;
step 3, after each annular cold water pipeline 9 is connected with a thermal circulation pipeline, waste heat recovery is respectively carried out on an indoor test bed of the aeroengine under various test conditions;
in the process of performing waste heat recovery on different test run conditions, the opening degrees of the inlet regulating valve 11 and the branch regulating valve 15 are regulated to realize the regulation of the inlet cold water temperature of the annular cold water pipeline 9.
The application has the beneficial effects that: according to the waste heat recovery device, the system and the method for the indoor test bed of the aeroengine, which are provided by the embodiment of the application, the waste heat recovery device formed by reasonably arranging the plurality of I-shaped heat pipes and the plurality of annular cold water pipelines 9 on the outer wall surface of the injection cylinder 3, and the waste heat recovery system formed by arranging the heat circulation pipelines matched with the waste heat recovery device are adopted, so that the waste heat recovery method is implemented by adopting the waste heat recovery system. In the technical scheme of waste heat recovery, on one hand, through structurally modifying the evaporation end 6 and the condensation end 8 of the conventional flat heat pipe, an I-shaped heat pipe which can be matched with the outer wall surface of the injection cylinder 3 and the outer wall surfaces of a plurality of annular cold water pipelines 9 is formed, and heat exchange between the injection cylinder 3 and the annular cold water pipelines 9 is implemented; on the other hand, CFD pneumatic simulation based on a test bed is adopted to obtain the temperature distribution of exhaust gas in the injection cylinder 3, so that an I-shaped heat pipe and an annular cold water pipeline 9 are correspondingly arranged in a region with higher exhaust gas temperature on the outer wall surface of the injection cylinder 3; in addition, CFD multiphase flow simulation based on the I-shaped heat pipes is adopted, and the structure and the layout form of the optimal I-shaped heat pipes are determined through the I-shaped heat pipes of the heat insulation sections 7 with different lengths and the heat transfer efficiency under the layout forms (including the layout quantity and the layout positions) of the different I-shaped heat pipes; on the other hand, under a plurality of test-run working conditions of test-run tests of the aero-engine, the exhaust flow and the temperature of the test-run bench are greatly changed, so that the temperature of the outer wall surface of the injection cylinder 3 is greatly changed, and the change of the heat exchange amount or the waste heat recovery amount caused by the great change is also characterized in that a reflux branch pipeline is arranged on a water outlet pipeline, so that the control of the inlet cold water temperature is realized through the opening adjustment of a branch adjusting valve 15 in the reflux branch pipeline and an inlet adjusting valve 11 in a water inlet pipeline, the heat exchange amount is adjusted, and the effects of improving the adjusting range, the control precision, the stability and the response speed of the heat exchange amount are realized; furthermore, the front end of the load is provided with the storage tank, and high-temperature water from the water outlet pipeline is stored, so that the load can stably operate.
According to the technical scheme provided by the embodiment of the application, through the adaptation of the conventional flat heat pipe, the optimization of the shape, the structure and the layout form of the I-shaped heat pipe is provided, the control scheme for adjusting the temperature of inlet cold water and the control strategy for on-line table lookup are provided, the problem of waste heat recovery of the indoor test bed of the aero-engine is solved, the efficient recovery of the waste heat of the indoor test bed of the aero-engine is realized, the energy utilization rate of the test bed is improved, and the method has higher practicability and advancement and can be widely applied to the indoor test bed of the aero-engine. In addition, the waste heat recovery scheme has the advantages of strong adaptability, high stability, high control precision and the like, and can meet the waste heat recovery requirements under different test run states.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.
FIG. 1 is a schematic view of an exhaust system of an aircraft engine room test bed;
fig. 2 is a schematic structural diagram of a waste heat recovery device of an indoor test bed of an aero-engine, provided by an embodiment of the application, mounted on an ejector barrel;
fig. 3 is a schematic structural diagram of the waste heat recovery device provided in the embodiment shown in fig. 2 installed in an indoor test bed of an aero-engine;
fig. 4 is a schematic structural diagram of an i-shaped heat pipe in the heat recovery device provided in the embodiment shown in fig. 2;
fig. 5 is a schematic diagram of a waste heat recovery system of an indoor test bed of an aero-engine according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
The background art already shows that waste heat recovery is not widely applied to an indoor test bed of an aeroengine, and a feasible technical scheme is lacked. For aeroengine test run test, the device has the characteristics of complex test run state and great difference of exhaust flow and temperature under each test run working condition, and in addition, the indoor test run bench has high requirements on pneumatic resistance and noise control of exhaust. Therefore, aiming at the characteristics of the indoor test bed of the aero-engine, the development of the waste heat recovery scheme of the indoor test bed of the aero-engine needs to solve the following technical problems:
1. the problem of adaptability of the waste heat recovery equipment of the indoor test bed of the aero-engine is solved;
2. the problem of exhaust flow and temperature change under each test run operating mode influence on the waste heat recovery of the indoor test run platform of the aero-engine is solved.
According to the embodiment of the application, through analyzing the characteristics of the indoor test bed of the aero-engine, the problem that the energy utilization rate of the test bed is affected due to heat energy loss caused by high-temperature exhaust of an exhaust system of the indoor test bed of the aero-engine is solved, and a waste heat recovery scheme which is applicable to multiple test conditions and high in efficiency is developed and applied to the indoor test bed of the aero-engine, so that the energy utilization rate of the test bed is improved, and the energy-saving process of the indoor test bed of the aero-engine is promoted.
The following specific embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
The embodiment of the application aims to realize the waste heat recovery of the test bed in the aero-engine room, namely the waste heat recovery of the test bed exhaust system. Fig. 1 is a schematic structural diagram of an exhaust system of a test bed in an aero-engine room. In fig. 1, a test workshop 1 is communicated with an injection room 2, an exhaust tower 4 is vertically arranged and is communicated with the injection room 2, an exhaust silencing device 5 is arranged in the exhaust tower 4, an injection cylinder 3 is arranged in the injection room 2, an inlet of the injection cylinder 3 is positioned in the test workshop 1, an outlet of the injection cylinder is positioned in the exhaust tower 4, normal-temperature gas injection in the test workshop 1 is realized by high-temperature high-speed exhaust of an engine tail nozzle through the injection cylinder 3, the temperature and the speed of exhaust gas are reduced after injection and mixing, the exhaust gas is discharged into the exhaust tower 4, and the flow direction of the exhaust gas is marked by a dotted line arrow in fig. 1.
The waste heat recovery of the test bed exhaust system shown in fig. 1 is that of the hot gas discharged from the injection cylinder 3. For the ejector cylinder 3, the embodiment of the application firstly provides a waste heat recovery device, fig. 2 is a schematic structural relation diagram of the waste heat recovery device of the indoor test bed of the aero-engine provided by the embodiment of the application, which is installed on the ejector cylinder, and fig. 3 is a schematic structural relation diagram of the waste heat recovery device of the embodiment of fig. 2, which is installed in the indoor test bed of the aero-engine. Referring to fig. 2 and 3, the components of the waste heat recovery device provided in the embodiment of the present application include: a plurality of annular cold water pipes 9 and a plurality of I-shaped heat pipes.
The waste heat recovery device has the structure that: a plurality of annular cold water pipelines 9 are arranged on the cylindrical outer wall surface of the injection cylinder 3 at intervals along the axial direction of the cylindrical outer wall surface; in addition, a plurality of I-shaped heat pipes are distributed in the circumferential direction in an annular plane formed by each annular cold water pipeline 9 and the injection cylinder 3, and the annular cold water pipeline 9 is fixedly supported on the outer side of the cylinder wall of the injection cylinder 3 through the plurality of I-shaped heat pipes distributed in the circumferential direction.
It should be noted that, as shown in fig. 3, 3 annular cold water pipes 9 are arranged on the outer wall surface of the injection cylinder 3 at intervals along the axial direction, as shown in fig. 2, only 1 i-shaped heat pipe is arranged between a single annular cold water pipe 9 and the injection cylinder 3, and in practical application, a plurality of i-shaped heat pipes are arranged in the annular plane along the circumferential direction so as to realize efficient heat recovery. The embodiment of the application does not limit the arrangement quantity and the arrangement positions of the annular cold water pipeline 9 and the I-shaped heat pipes, and determines the arrangement form of each part in the waste heat recovery device according to the actual condition of the injection cylinder 3.
Fig. 4 is a schematic structural diagram of an i-shaped heat pipe in the heat recovery device according to the embodiment shown in fig. 2. As shown in connection with fig. 2 and 4, each of the i-shaped heat pipes includes an evaporation end 6 and a condensation end 8 provided as arc segments, and an insulation segment 7 for communicating the evaporation end 6 and the condensation end 8; in the structure of the I-shaped heat pipe, a closed communication cavity formed by the evaporation end 6, the heat insulation section 7 and the condensation end 8 is filled with a liquid working medium positioned at the evaporation end 6, and the liquid working medium is usually water.
The recovery principle of the waste heat recovery device provided by the embodiment of the application is as follows:
after the annular cold water pipeline 9 is installed in place with the I-shaped heat pipe at the corresponding position, the evaporation end 6 positioned at the inner side of the I-shaped heat pipe is attached to the outer side wall surface of the injection cylinder 3, and the condensation end 8 positioned at the outer side is attached to the inner side wall surface of the annular cold water pipeline 9 at the corresponding installation position. Therefore, after the liquid working medium in the evaporation end 6 can be evaporated to form gas through the heat energy in the injection cylinder 3, the gas passes through the heat insulation section 7 to the condensation end 8, and the gas in the condensation end 8 is liquefied through cold water flowing in the annular cold water pipeline 9 and then returns to the evaporation end 6, so that the injection cylinder 3 and the annular cold water pipeline 9 form heat exchange through the I-shaped heat pipe, the purpose of recovering the heat energy in the injection cylinder 3 is achieved, and the waste heat recovery requirement on the test bed in the aeroengine room is realized.
Referring to fig. 2 and 4, in the structure of the i-shaped heat pipe according to the embodiment of the present application, the integral structure of the evaporation end 7 and the condensation end 8 is set to be an arc segment, and the arc segment is matched with the inner and outer rings of the annular plane formed by the annular cold water pipe 9 and the injection cylinder 3. The inner wall surface of the evaporation end 7 is provided with a smooth arc-shaped surface along the installation circumferential direction and can be attached to the outer side wall surface of the injection cylinder 3; in addition, the outer wall surface of the condensation end 8 is concaved inwards along the installation circumference to form a semicircular groove, the inner annular wall surface of the pipeline of the annular cold water pipeline 9 can be embedded into the semicircular groove, and the condensation end 8 structure of the semicircular groove can form a stable and reliable installation structure with the annular cold water pipeline 9 on one hand, and on the other hand, the heat exchange area is increased, so that the heat energy recovery is facilitated.
In one implementation manner of the embodiment of the application, based on CFD pneumatic simulation of a test bed, the temperature distribution of exhaust gas in the injection cylinder 3 is obtained, so that the axial arrangement positions of the annular cold water pipeline 9 and the I-shaped heat pipes are determined, and the I-shaped heat pipes and the annular cold water pipeline 9 are generally arranged in a region with higher exhaust gas temperature in the injection cylinder 3. It should be noted that, since a plurality of i-shaped heat pipes need to be arranged between each annular cold water pipeline 9 and the injection cylinder 3, the axial arrangement position of the i-shaped heat pipes on the outer wall of the injection cylinder 3, that is, the axial arrangement position of the annular cold water pipeline 9 in the injection cylinder 3.
In one embodiment of the implementation, the annular diameters of the plurality of annular cold water pipelines 9 which are axially arranged at intervals along the injection cylinder 3 are the same, and the annular diameters of the 3 annular cold water pipelines 9 are the same as shown in fig. 3; in the scheme, if the temperatures of the arrangement positions of the 3 annular cold water pipelines 9 are the same, I-shaped heat pipes with the same number can be respectively arranged on the inner sides of the annular cold water pipelines 9; if the temperatures of the arrangement positions of the 3 annular cold water pipelines 9 are different, the number of the I-shaped heat pipes arranged on the inner side of the annular cold water pipeline 9 in the high temperature area can be larger than that of the I-shaped heat pipes arranged on the inner side of the annular cold water pipeline 9 in the low temperature area.
In another embodiment of this embodiment, the annular diameter of the plurality of annular cold water pipes 9 arranged at intervals along the axial direction of the ejector cartridge 3 may be different, for example, for annular cold water pipes 9 in the high temperature region, the annular diameter may be larger than the annular diameter of annular cold water pipes 9 in the low temperature region. It should be noted that, in the embodiments with different diameters of the circular rings, the lengths of the heat insulation sections 7 for arranging the i-shaped heat pipes on the inner sides of the circular cold water pipes 9 with different diameters of the circular rings are different, and the specific structures of the i-shaped heat pipes are required to be matched with the diameters of the circular rings of the circular cold water pipes 9 at the corresponding positions.
In another implementation manner of the embodiment of the present application, based on CFD multiphase flow simulation of the i-shaped heat pipes, the optimal number and position of the i-shaped heat pipes and the optimal length of the heat insulation sections 7 in the i-shaped heat pipes can be selected by comparing the heat transfer efficiency of the i-shaped heat pipes of different lengths of the heat insulation sections 7 and the layout forms (including the layout number and the layout position) of the i-shaped heat pipes.
In the implementation mode, based on CFD multiphase flow simulation of the I-shaped heat pipe, the layout parameters of the I-shaped heat pipe, namely the length, the layout number and the layout positions of the heat insulation sections 7, can be determined in a simulation mode for different injection cylinders 3, so that the waste heat recovery device provided by the embodiment of the application can be applied to heat recovery of the injection cylinders 3 with different exhaust temperature distribution by changing the layout parameters, and has universal applicability to the indoor test bed of the aeroengine with different specific structures and performances.
In the embodiment of the application, in consideration of vibration of the injection cylinder 3 in the test run state of the engine, the annular cold water pipeline can be a metal hose.
According to the waste heat recovery device of the indoor test bed of the aero-engine, provided by the embodiment of the application, waste heat recovery is realized by reasonably arranging a plurality of I-shaped heat pipes and a plurality of annular cold water pipes 9 on the outer wall surface of the injection cylinder 3. On one hand, considering that the high-temperature wall surface of the injection cylinder 3 and the low-temperature wall surface of the annular cold water pipeline 9 are both cylindrical or circular, structurally reforming the evaporation end 6 and the condensation end 8 of the conventional straight heat pipe respectively designs a cylindrical surface or an annular surface which is matched with the outer wall surfaces of the injection cylinder 3 and the annular cold water pipeline 9; on the other hand, in order to increase the heat transfer area, the size of the evaporating end 6 and the condensing end 8 is enlarged on the cross section, and a circular arc section profile with two extending sides is designed, namely an I-shaped heat pipe is formed on the integral structure; on the other hand, based on CFD pneumatic simulation of the test bed, the temperature distribution of exhaust gas in the injection cylinder 3 is obtained, so that an I-shaped heat pipe and an annular cold water pipeline 9 are correspondingly arranged in a region with higher exhaust gas temperature on the outer wall surface of the injection cylinder 3; further, based on CFD multiphase flow simulation of the I-shaped heat pipes, the optimal structure and layout form of the I-shaped heat pipes are determined through the I-shaped heat pipes of the heat insulation sections 7 with different lengths and the heat transfer efficiency under the layout forms (including the layout quantity and the layout positions) of the different I-shaped heat pipes.
Based on the waste heat recovery device of the indoor test bed of the aero-engine provided by the embodiment of the application, the embodiment of the application also provides a waste heat recovery system of the indoor test bed of the aero-engine, and fig. 5 is a schematic diagram of the waste heat recovery system of the indoor test bed of the aero-engine provided by the embodiment of the application, as shown in fig. 5, the waste heat recovery system comprises: the waste heat recovery device provided in any of the above embodiments may be configured as described with reference to fig. 2 to 4, and at least one set of thermal circulation lines.
Referring to fig. 2, fig. 3, and fig. 5, a thermal circulation pipeline in a waste heat recovery system according to an embodiment of the present application includes: the water inlet pipeline is connected to the front end of the annular cold water pipeline 9, and the water outlet pipeline is connected to the rear end of the annular cold water pipeline 9; the inlet switching valve 10, the inlet regulating valve 11, the filter 12, the circulating pump 13, the flowmeter and the temperature sensor are sequentially connected to the water inlet pipeline, the water outlet switching valve 14, the outlet regulating valve 17 and the outlet switching valve 18 are sequentially connected to the water outlet pipeline, a backflow branch pipeline is arranged at the rear end of the water outlet switching valve 14, the other end of the backflow branch pipeline is connected to the water inlet pipeline between the inlet regulating valve 11 and the filter 12, and the branch pipeline is sequentially connected with the branch regulating valve 15 and the branch switching valve 16. The inlet switch valve 10, the outlet switch valve 14, the branch switch valve 16 and the outlet switch valve 18 are used for controlling the on-off of corresponding flow paths, and the inlet regulating valve 11, the branch regulating valve 15 and the outlet regulating valve 17 are used for regulating the flow of the corresponding flow paths to control the inlet cold water temperature.
The working principle of the thermal circulation pipeline in the embodiment of the application is as follows:
the low-temperature water is provided through the water inlet pipeline, the low-temperature water enters the annular cold water pipeline 9 after being pressurized by the circulating pump 13, the high-temperature water flows out after being subjected to heat exchange by the annular cold water pipeline 9 and the I-shaped heat pipe, part of the high-temperature water flows out through the water outlet pipeline to realize recovery, and the other part of the high-temperature water is mixed with the low-temperature water of the water inlet pipeline through the reflux branch pipeline to form a circulating loop.
It should be noted that, the test run test performed by the test run platform in the aero-engine room refers to the test run of the engine, and has various test run conditions, including four test run conditions generally: slow car, 0.8 line, middle and boost. For the different test conditions, the exhaust flow and the temperature of the test bed are greatly changed, so that the temperature of the outer wall surface of the injection cylinder 3 is greatly changed, and the heat exchange amount or the waste heat recovery amount is greatly changed. Therefore, for different test conditions, if the cold water flow of the annular cold water pipeline 9 is only regulated, the large-scale regulation of the heat exchange amount is difficult to realize.
In view of the above problems, in the waste heat recovery system provided in the embodiment of the present application, on one hand, a return branch pipeline is disposed on the water outlet pipeline of the thermal circulation pipeline, and the hot water in the return branch pipeline can be mixed with the low-temperature water in the water inlet pipeline to adjust the temperature of the cold water at the inlet of the annular cold water pipeline 9. Based on the heat circulation pipeline structure of the waste heat recovery system, on the basis that the cold water flow of the annular cold water pipeline 9 is adjustable, the heat exchange amount can be adjusted by controlling the temperature of the cold water at the inlet, and the adjustment range, the control precision, the stability and the response speed of the heat exchange amount can be improved by adjusting the cold water flow and the cold water temperature.
According to the waste heat recovery system provided by the embodiment of the application, aiming at the adjustment of the temperature of cold water in a thermal circulation pipeline under various test run working conditions, the opening degree of the inlet regulating valve 11 and the opening degree of the branch regulating valve 15 can be adjusted to adjust the temperature of the inlet cold water of the annular cold water pipeline 9, so that the heat recovery requirement on the temperature of the outer wall surface of the injection cylinder 3 under different test run working conditions is met.
In a specific implementation, the control scheme of the inlet cold water temperature may be an online table look-up mode, and based on the real-time temperature of the outer wall of the injection cylinder 3, a preset mapping table of the outer wall temperature of the injection cylinder-the inlet cold water temperature (i.e. the inlet temperature of the annular cold water pipeline 9) -the opening of the main water inlet and outlet regulating valve (i.e. the opening of the inlet regulating valve 11 and the opening of the outlet regulating valve 17) and the opening of the branch regulating valve (i.e. the opening of the branch regulating valve 15) is queried, so as to obtain the opening of the main water inlet and outlet regulating valve and the opening of the branch regulating valve.
In one implementation manner of the embodiment of the present application, the plurality of annular cold water pipes 9 in the waste heat recovery device may be connected in parallel to one set of thermal circulation pipes, that is, the thermal recovery is performed on the plurality of annular cold water pipes 9 arranged in parallel through one set of thermal circulation pipes.
In another implementation manner of the embodiment of the present application, a set of thermal circulation pipes may be configured for each annular cold water pipe 9 in the waste heat recovery device, that is, each annular cold water pipe 9 performs thermal energy recovery through an independent thermal circulation pipe, and the thermal energy recovery efficiency is more efficient, but a hardware configuration of multiple sets of thermal circulation pipes is required.
Further, as shown in fig. 5, the waste heat recovery system provided by the embodiment of the application may further be provided with a storage tank, where the storage tank is specifically disposed between the rear end of the outlet switch valve 18 of the water outlet pipeline and the load, and is used for storing the high-temperature water from the water outlet pipeline, so that the load stably operates; for example, a storage tank can be arranged at the front end of a load such as domestic hot water, heating and the like.
Based on the waste heat recovery system of the indoor test bed of the aero-engine provided by the embodiments of the present application, the embodiments of the present application further provide a waste heat recovery method of the indoor test bed of the aero-engine, the waste heat recovery method is performed by adopting the waste heat recovery system provided by any one of the embodiments of the present application, and the waste heat recovery method includes the following implementation steps:
step 1, determining the arrangement number of annular cold water pipelines 9 and the axial arrangement positions of the annular cold water pipelines on the injection cylinder 3 according to the temperature distribution characteristics of exhaust gas in the injection cylinder 3 in an indoor test bed of the aeroengine;
in the step, the temperature distribution characteristic of the exhaust gas in the injection cylinder 3 can be obtained through CFD pneumatic simulation of a test bed, and the axial arrangement position of the annular cold water pipeline 9 determined in the step, namely the axial arrangement position of the I-shaped heat pipe on the outer wall surface of the injection cylinder 3.
And 2, determining the length and the layout form of the heat insulation section 7 of the I-shaped heat pipe for carrying out waste heat recovery on the current test bed by comparing the I-shaped heat pipes of the heat insulation sections 7 with different lengths and comparing the heat transfer efficiency under the layout forms (the layout forms comprise the layout quantity and the layout positions) of the I-shaped heat pipes based on CFD multiphase flow simulation of the I-shaped heat pipe.
According to the waste heat recovery method provided by the embodiment of the application, through the CFD simulation in the step 1 and the step 2, the structures and layout forms of the annular cold water pipeline 9 and the I-shaped heat pipes in the waste heat recovery system for executing the waste heat recovery method can be determined aiming at test benches with different structures and performance parameters. For example, the diameter, number and arrangement positions of the rings of the annular cold water pipe 9, and the length, arrangement number and arrangement positions of the heat insulating sections 7 of the i-shaped heat pipes arranged inside the annular cold water pipe 9.
Step 3, after each annular cold water pipeline 9 is connected with a thermal circulation pipeline, waste heat recovery is respectively carried out on an indoor test bed of the aeroengine under various test conditions;
in the step 3, in the process of performing waste heat recovery on the test bed under different test conditions, the opening degrees of the inlet regulating valve 11 and the branch regulating valve 15 are required to be regulated to realize the regulation of the inlet cold water temperature of the annular cold water pipeline 9. The test run of the aeroengine described in the above embodiment generally includes four working conditions: slow car, 0.8 line, middle and boost.
Under the different test conditions, the exhaust flow and the temperature of the test bed are greatly changed, so that the temperature of the outer wall surface of the injection cylinder 3 is greatly changed, and the heat exchange amount or the waste heat recovery amount is greatly changed. Therefore, for different test-run conditions, the embodiment of the application not only can adjust the cold water flow of the annular cold water pipeline 9, but also can adjust the inlet cold water temperature of the annular cold water pipeline 9.
In the specific implementation, through the reflux branch pipeline arranged on the water outlet pipeline, the temperature of the cold water at the inlet is controlled to realize the adjustment of the heat exchange quantity, so that the adjustment range, the control precision, the stability and the response speed of the heat exchange quantity can be effectively improved. Specifically, the control scheme of the inlet cold water temperature may be an online table look-up mode, based on the real-time temperature of the outer wall of the injection cylinder 3, a preset mapping table of the outer wall temperature of the injection cylinder-the inlet cold water temperature (i.e. the inlet temperature of the annular cold water pipeline 9) -the opening of the main water inlet and outlet regulating valve (i.e. the opening of the inlet regulating valve 11 and the opening of the outlet regulating valve 17) and the opening of the branch regulating valve (i.e. the opening of the branch regulating valve 15) is queried, so as to obtain the opening of the main water inlet and outlet regulating valve and the opening of the branch regulating valve.
For the 4 test conditions, in a preset mapping table, the magnitude relations of the outer wall temperature of the injection cylinder, the cold water temperature of the inlet, the opening of the inlet regulating valve 11 and the opening of the branch regulating valve 15, which correspond to the 4 test conditions, are shown in the following table:
in a specific implementation manner of the embodiment of the application, if the specifications of the inlet regulating valve 11, the branch regulating valve 15 and the outlet regulating valve 17 are the same in a set of thermal circulation pipelines which are connected in a matched manner to one annular cold water pipeline 9, in the process of implementing the opening degree adjustment, the sum of the opening degrees of the inlet regulating valve 11 and the branch regulating valve 15 is 100%, and the opening degrees of the inlet regulating valve 11 and the outlet regulating valve 17 are kept identical.
According to the waste heat recovery device, the system and the method for the indoor test bed of the aeroengine, which are provided by the embodiment of the application, the waste heat recovery device formed by reasonably arranging the plurality of I-shaped heat pipes and the plurality of annular cold water pipelines 9 on the outer wall surface of the injection cylinder 3, and the waste heat recovery system formed by arranging the heat circulation pipelines matched with the waste heat recovery device are adopted, so that the waste heat recovery method is implemented by adopting the waste heat recovery system. In the technical scheme of waste heat recovery, on one hand, through structurally modifying the evaporation end 6 and the condensation end 8 of the conventional flat heat pipe, an I-shaped heat pipe which can be matched with the outer wall surface of the injection cylinder 3 and the outer wall surfaces of a plurality of annular cold water pipelines 9 is formed, and heat exchange between the injection cylinder 3 and the annular cold water pipelines 9 is implemented; on the other hand, CFD pneumatic simulation based on a test bed is adopted to obtain the temperature distribution of exhaust gas in the injection cylinder 3, so that an I-shaped heat pipe and an annular cold water pipeline 9 are correspondingly arranged in a region with higher exhaust gas temperature on the outer wall surface of the injection cylinder 3; in addition, CFD multiphase flow simulation based on the I-shaped heat pipes is adopted, and the structure and the layout form of the optimal I-shaped heat pipes are determined through the I-shaped heat pipes of the heat insulation sections 7 with different lengths and the heat transfer efficiency under the layout forms (including the layout quantity and the layout positions) of the different I-shaped heat pipes; on the other hand, under a plurality of test-run working conditions of test-run tests of the aero-engine, the exhaust flow and the temperature of the test-run bench are greatly changed, so that the temperature of the outer wall surface of the injection cylinder 3 is greatly changed, and the change of the heat exchange amount or the waste heat recovery amount caused by the great change is also characterized in that a reflux branch pipeline is arranged on a water outlet pipeline, so that the control of the inlet cold water temperature is realized through the opening adjustment of a branch adjusting valve 15 in the reflux branch pipeline and an inlet adjusting valve 11 in a water inlet pipeline, the heat exchange amount is adjusted, and the effects of improving the adjusting range, the control precision, the stability and the response speed of the heat exchange amount are realized; furthermore, the front end of the load is provided with the storage tank, and high-temperature water from the water outlet pipeline is stored, so that the load can stably operate.
According to the technical scheme provided by the embodiment of the application, through the adaptation of the conventional flat heat pipe, the optimization of the shape, the structure and the layout form of the I-shaped heat pipe is provided, the control scheme for adjusting the temperature of inlet cold water and the control strategy for on-line table lookup are provided, the problem of waste heat recovery of the indoor test bed of the aero-engine is solved, the efficient recovery of the waste heat of the indoor test bed of the aero-engine is realized, the energy utilization rate of the test bed is improved, and the method has higher practicability and advancement and can be widely applied to the indoor test bed of the aero-engine. In addition, the waste heat recovery scheme has the advantages of strong adaptability, high stability, high control precision and the like, and can meet the waste heat recovery requirements under different test run states.
Although the embodiments of the present application are described above, the present application is not limited to the embodiments which are used for understanding the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.
Claims (10)
1. Waste heat recovery device of indoor test bed of aeroengine, a serial communication port, the indoor test bed of aeroengine is provided with exhaust system, exhaust system is through being located the injection section of thick bamboo (3) that draws in penetrating room (2) and is realized engine tail pipe high temperature high-speed exhaust and draw to the normal atmospheric temperature gas in test room (1), draws to mix back exhaust temperature and speed and reduce, discharges in exhaust tower (4), waste heat recovery device includes:
a plurality of annular cold water pipelines (9) are arranged on the outer wall surface of the injection cylinder (3) at intervals along the axial direction of the injection cylinder, a plurality of I-shaped heat pipes are arranged in the circumferential direction in an annular plane formed by each annular cold water pipeline (9) and the injection cylinder (3), and the annular cold water pipelines (9) are fixedly supported on the outer side of the cylinder wall of the injection cylinder (3) through the plurality of I-shaped heat pipes arranged in the circumferential direction;
each I-shaped heat pipe comprises an evaporation end (6) and a condensation end (8) which are arranged as arc sections, and an insulation section (7) which is used for communicating the evaporation end (6) and the condensation end (8), wherein a closed communication cavity formed by the evaporation end (6), the insulation section (7) and the condensation end (8) is filled with a liquid working medium positioned at the evaporation end (6);
after each I-shaped heat pipe is installed, the evaporation end (6) located on the inner side is attached to the outer side wall surface of the injection cylinder (3), the condensation end (8) located on the outer side is attached to the inner side wall surface of the annular cold water pipeline (9) at the corresponding installation position, and the heat energy in the injection cylinder (3) is used for evaporating liquid working medium in the evaporation end (6) to form gas, the gas passes through the heat insulation section (7) to the condensation end (8), and cold water flowing through the annular cold water pipeline (9) is used for liquefying the gas in the condensation end (8) and then returning to the evaporation end (6), so that heat exchange is formed between the condensation end and the annular cold water pipeline (9) to recover the heat energy of exhaust gas in the injection cylinder (3).
2. The device for recovering waste heat of an aircraft engine room test bed according to claim 1, wherein,
in the I-shaped heat pipe, the inner wall surface of the evaporation end (6) is provided with an arc-shaped surface along the installation circumferential direction and is attached to the outer side wall surface of the injection cylinder (3);
the outer wall surface of the condensation end (8) is inwards concave to form a semicircular groove along the installation circumference so as to embed the inner annular wall surface of the annular cold water pipeline (9) into the semicircular groove.
3. The device for recovering waste heat of an aircraft engine room test bed according to claim 1, wherein,
the axial arrangement positions of the plurality of annular cold water pipelines (9) on the injection cylinder (3) are as follows: according to the temperature distribution of the exhaust gas in the ejector cylinder (3);
the diameters of the rings of the plurality of annular cold water pipelines (9) which are arranged at intervals along the axial direction of the injection cylinder (3) are the same, or the diameters of the rings of the plurality of annular cold water pipelines (9) are different.
4. The device for recovering waste heat of an aircraft engine room test bed according to claim 1, wherein,
the I-shaped heat pipe is arranged on the outer wall surface of the injection cylinder (3) in the following mode: the arrangement form of the I-shaped heat pipe is determined according to the temperature distribution of exhaust gas in the injection cylinder (3), and comprises the following steps: the number of layout and the layout position.
5. The device for recovering waste heat of an aircraft engine room test bed according to claim 4, wherein,
the waste heat recovery device is applied to heat recovery of the injection cylinder (3) with different exhaust temperature distribution by adjusting the arrangement quantity and the arrangement position of the I-shaped heat pipes and the length of the heat insulation section (7) in the I-shaped heat pipes.
6. Waste heat recovery system of test bed in aeroengine room, characterized in that includes: the waste heat recovery device according to any one of claims 1 to 5, and at least one set of heat circulation pipes;
wherein, the thermal cycle pipeline includes: the water inlet pipeline is connected to the front end of the annular cold water pipeline (9), and the water outlet pipeline is connected to the rear end of the annular cold water pipeline (9); an inlet switching valve (10), an inlet regulating valve (11), a filter (12), a circulating pump (13), a flowmeter and a temperature sensor are sequentially connected on a water inlet pipeline, a water outlet switching valve (14), an outlet regulating valve (17) and an outlet switching valve (18) are sequentially connected on a water outlet pipeline, a backflow branch pipeline is arranged at the rear end of the water outlet switching valve (14), the other end of the backflow branch pipeline is connected to the water inlet pipeline between the inlet regulating valve (11) and the filter (12), and a branch regulating valve (15) and a branch switching valve (16) are sequentially connected on the backflow branch pipeline;
the heat circulation pipeline is used for providing low-temperature water through the water inlet pipeline, the low-temperature water enters the annular cold water pipeline (9) after being pressurized by the circulation pump (13), the high-temperature water flows out after being subjected to heat exchange by the annular cold water pipeline (9) and the I-shaped heat pipe, part of the high-temperature water flows out through the water outlet pipeline to realize recovery, and the other part of the high-temperature water is mixed with the low-temperature water of the water inlet pipeline through the reflux branch pipeline to form a circulation loop.
7. The system of claim 6, wherein the test run of the test run in the aircraft engine room has a plurality of test run conditions,
the waste heat recovery system adjusts the inlet cold water temperature of the annular cold water pipeline (9) by adjusting the opening degrees of the inlet adjusting valve (11) and the branch adjusting valve (15), so that the heat recovery requirement on the temperature of the outer wall surface of the injection cylinder (3) under different test run working conditions is met.
8. The system for recovering waste heat of an aircraft engine room test bed according to claim 6,
a plurality of annular cold water pipelines (9) in the waste heat recovery device are connected in parallel to a set of heat circulation pipelines; or alternatively, the process may be performed,
and each annular cold water pipeline (9) in the waste heat recovery device is provided with a set of heat circulation pipeline respectively.
9. The aircraft engine indoor test bed waste heat recovery system of claim 6, further comprising: a storage tank;
a storage tank is arranged between the rear end of an outlet switch valve (18) of the water outlet pipeline and the load and is used for storing high-temperature water from the water outlet pipeline so as to enable the load to stably operate.
10. A method for recovering waste heat of an aircraft engine indoor test bed, characterized in that the waste heat recovery system of the aircraft engine indoor test bed according to any one of claims 6 to 9 is adopted to implement the waste heat recovery method for the aircraft engine indoor test bed, and the waste heat recovery method comprises:
step 1, determining the arrangement number of annular cold water pipelines (9) and the axial arrangement positions of the injection barrels (3) according to the temperature distribution of exhaust gas in the injection barrels (3) in an indoor test bed of the aeroengine;
step 2, based on CFD multiphase flow simulation of the I-shaped heat pipes, determining the length and layout form of the heat insulation section (7) of the I-shaped heat pipe for performing waste heat recovery on the current test bed by comparing the heat transfer efficiency of the I-shaped heat pipes of different lengths of the heat insulation section (7) and the layout forms of the I-shaped heat pipes;
step 3, after each annular cold water pipeline (9) is connected with a thermal circulation pipeline, waste heat recovery is respectively carried out on an indoor test bed of the aero-engine under various test conditions;
in the process of executing waste heat recovery on different test run working conditions, the opening degree of the inlet regulating valve (11) and the opening degree of the branch regulating valve (15) are regulated to realize the regulation of the inlet cold water temperature of the annular cold water pipeline (9).
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| CN118049875A (en) * | 2024-04-16 | 2024-05-17 | 四川力泓电子科技有限公司 | Ring plate type heat pipe, heat dissipation mechanism and heat dissipation system |
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| CN118049875A (en) * | 2024-04-16 | 2024-05-17 | 四川力泓电子科技有限公司 | Ring plate type heat pipe, heat dissipation mechanism and heat dissipation system |
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