CN115060093A - Fuel-air heat exchanger - Google Patents
Fuel-air heat exchanger Download PDFInfo
- Publication number
- CN115060093A CN115060093A CN202210405629.9A CN202210405629A CN115060093A CN 115060093 A CN115060093 A CN 115060093A CN 202210405629 A CN202210405629 A CN 202210405629A CN 115060093 A CN115060093 A CN 115060093A
- Authority
- CN
- China
- Prior art keywords
- hot air
- fuel
- cavity
- shell
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims abstract description 13
- 239000000295 fuel oil Substances 0.000 claims abstract description 10
- 230000008646 thermal stress Effects 0.000 abstract description 4
- 238000004939 coking Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application provides a fuel-air heat exchanger, which comprises a shell, two tube plates and a partition plate; the shell is provided with a fuel inlet, a fuel outlet, a hot air inlet and a hot air outlet; the two tube plates are arranged in the shell so as to divide the shell into three chambers which are distributed transversely; the partition plate is arranged in a cavity close to the hot air inlet and the hot air outlet in the shell, and divides the cavity which is transversely distributed close to the hot air inlet and the hot air outlet into two cavities, so that a cavity for circulating fuel oil, a cavity for flowing in hot air, a cavity for flowing out hot air and a cavity for isolating fuel oil flow and air flow are formed in the shell; meanwhile, a plurality of heat exchange tubes are arranged between the fuel circulation cavity and the hot air outflow cavity, and vent holes communicated with the two cavities are formed in the tube plate between the fuel circulation cavity and the hot air outflow cavity. The heat exchanger of this application forms the medium temperature cushion chamber between high temperature chamber and low temperature chamber for the difference in temperature of tube sheet both sides reduces by a wide margin, has reduced thermal stress.
Description
Technical Field
The application relates to the technical field of aircraft engines, in particular to a fuel-air heat exchanger.
Background
With the continuous development of the technology of the aero-engine, the temperature of the turbine of the engine is increased sharply, and the heat dissipation requirements of all parts and systems are greatly improved. Generally, the cooling design of engine components is realized by air bleed of an engine compressor, and the air bleed needs to meet two conditions of proper pressure and proper temperature. However, due to the improvement of the stage pressure ratio of each stage of the compressor and the structural limitation of a proper air-entraining position, the cooling air-entraining pressure at a feasible position is sufficient but the temperature level is greatly improved, and the requirements on cooling of engine parts, fulcrum sealing and the like cannot be met. The prior art uses fuel for the high temperature bleed air to recool the air to reduce the temperature of the cooling air.
As shown in fig. 1, a conventional fuel-air heat exchanger, which uses low-temperature fuel to cool high-temperature air, is configured as a shell-and-tube heat exchanger, and when the temperature of the high-temperature air is higher, the following problems mainly exist:
1) the high-temperature air inlet cavity is filled with high-temperature air, and the temperature difference between the high-temperature air inlet cavity and the low-temperature fuel oil cavity is too large, for example, about 200 ℃, so that great stress is generated at the welding position between the tube plate 13 and the shell 11 to cause a desoldering failure;
2) the high-temperature air inlet cavity and the low-temperature fuel oil cavity exchange heat through the tube plate 12, and the temperature of fuel oil contacted with the tube plate is high due to high air temperature, so that the fuel oil is coked.
Disclosure of Invention
It is an object of the present application to provide a fuel-air heat exchanger to address or mitigate at least one of the problems of the background art.
The technical scheme of the application is as follows: a fuel-air heat exchanger includes a shell, two tube sheets and a partition plate;
the shell is provided with a fuel inlet, a fuel outlet, a hot air inlet and a hot air outlet;
the two tube plates are arranged in the shell so as to divide the shell into three chambers which are distributed transversely;
the partition plate is arranged in a cavity close to the hot air inlet and the hot air outlet in the shell, and divides the cavity which is transversely distributed close to the hot air inlet and the hot air outlet into two cavities, so that a cavity for circulating fuel oil, a cavity for flowing in hot air, a cavity for flowing out hot air and a cavity for isolating fuel oil flow and air flow are formed in the shell;
meanwhile, a plurality of heat exchange tubes are arranged between the fuel circulation cavity and the hot air outflow cavity, and vent holes communicated with the two cavities are formed in the tube plate between the fuel circulation cavity and the hot air outflow cavity.
Furthermore, the heat exchange tubes are U-shaped and are arranged according to a predetermined rule.
Further, the hot air outlets are arranged in parallel, and the partition plate is arranged between the hot air inlet and the hot air outlet in parallel.
Further, the hot air inlet and the hot air outlet are symmetrically distributed by the partition plate.
Further, the fuel inlet and the fuel outlet are distributed on the upper side and the lower side of the shell and are not collinear in the vertical direction.
The application provides a fuel-air heat exchanger forms the medium temperature cushion chamber between the high temperature chamber and the low temperature chamber of heat exchanger through adopting double tube sheet or multi-tube plate structure for the difference in temperature of middle tube sheet both sides reduces by a wide margin, greatly reduced thermal stress, guaranteed the welded reliability of tube sheet and shell. The adoption of the medium-temperature buffer cavity enables heat exchange between the fuel and the hot measurement air to be mild on two sides of the inner tube plate, thereby reducing the risk of fuel coking, in particular the coking risk in a return area formed by a fuel inlet and the tube plate.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
FIG. 1 is a schematic view of a conventional fuel-air heat exchanger
FIG. 2 is a schematic view of the fuel-air heat exchanger of the present application.
FIG. 3 is a side view of the fuel-air heat exchanger of the present application.
FIG. 4 is a schematic view of the fluid flow path of the fuel-air heat exchanger of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to solve the problems that the thermal stress is concentrated at the position where the heat exchange temperature difference between a cold fluid inlet and a hot fluid inlet of the fuel-air heat exchanger is the largest, and the fuel is coked at the fuel inlet and a high-temperature air inlet of the fuel-air heat exchanger due to the high temperature of a heat exchange wall surface, the fuel-air heat exchanger with an improved structure is provided.
As shown in fig. 2, the present application provides a fuel-air heat exchanger including: shell 21, tubesheet 22 and spacer 23. The housing 21 has a fuel inlet Y1 (low temperature), a fuel outlet Y2, a hot air inlet Q1, and a hot air outlet Q2. Two tube plates 22 are provided in the shell 21, and the two tube plates 22 divide the interior of the shell 21 into three chambers which are distributed laterally. A partition 23 is provided in the housing 21 in a chamber near the hot air inlet and outlet, dividing the chamber into two chambers. Four chambers, namely a chamber for circulating fuel (r), a chamber for circulating hot air (r) and a chamber for isolating fuel flow and air flow (r), are thus formed in the housing 21. Meanwhile, a plurality of heat exchange tubes 24 are arranged between the self-cavity (I) and the cavity (II), and the tube plate 22 between the cavity (II) and the cavity (III) is provided with air holes communicated with the two cavities.
In one embodiment of the present application, the heat exchange tubes 24 are U-shaped and arranged according to a certain rule, as shown in fig. 3.
In one embodiment of the present application, the hot air inlet Q1 and the hot air outlet Q2 are arranged in parallel, and the partition 23 is disposed between the hot air inlet Q1 and the hot air outlet Q2. Preferably, the hot air inlet Q1 and the hot air outlet Q2 are symmetrically distributed on the partition 23.
In addition, in the embodiment of the present application, the fuel inlet Y1 and the fuel outlet Y2 are distributed on the upper and lower sides of the housing 21 and are not vertically collinear.
As shown in fig. 4, in the fuel-air radiator flow path, when high-temperature air enters the heat exchanger cavity (r) from the hot air inlet Q1, enters the heat exchange pipe 24 and flows along the pipe direction, heat exchange is performed with low-temperature fuel in the casing 21 in the process, the temperature of the air is reduced through heat exchange, and the cooled air reaches the cavity (r), then enters the air outlet cavity (c) and is discharged out of the heat exchanger through the hot air outlet Q2. In the process, cooled air enters the cavity (r), so that a cavity (r) with the highest temperature and a cavity (r) with the lowest temperature in the heat exchanger are formed in the interlayer of the double tube plates 24, and a middle-temperature buffer cavity is formed in the middle of the cavity (r).
The application provides a fuel-air heat exchanger forms the medium temperature cushion chamber between the high temperature chamber and the low temperature chamber of heat exchanger through adopting double tube sheet or multi-tube plate structure for the difference in temperature of middle tube sheet both sides reduces by a wide margin, greatly reduced thermal stress, guaranteed the welded reliability of tube sheet and shell. The adoption of the medium-temperature buffer cavity enables heat exchange between the fuel and the hot measurement air to be mild on two sides of the inner tube plate, thereby reducing the risk of fuel coking, in particular the coking risk in a return area formed by a fuel inlet and the tube plate.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. A fuel-air heat exchanger, characterized in that it comprises a shell (21), two tube sheets (22) and a partition (23);
wherein the housing (21) has a fuel inlet (Y1), a fuel outlet (Y2), a hot air inlet (Q1) and a hot air outlet (Q2);
the two tube plates (22) are arranged in the shell (21) so as to divide the shell (21) into three chambers which are distributed transversely;
the partition (23) is arranged in a cavity close to the hot air inlet and outlet in the shell (21), and divides the cavity which is transversely distributed close to the hot air inlet and outlet into two cavities, so that a cavity for circulating fuel oil, a cavity for inflowing hot air, a cavity for outflowing hot air and a cavity for isolating fuel oil flow and air flow are formed in the shell (21);
meanwhile, a plurality of heat exchange tubes (24) are arranged between the fuel circulation cavity and the hot air outflow cavity, and vent holes communicated with the two cavities are formed in a tube plate (22) between the fuel circulation cavity and the hot air outflow cavity.
2. The fuel-air heat exchanger according to claim 1, characterized in that the heat exchange tubes (24) are U-shaped and arranged on a predetermined basis.
3. The fuel-air heat exchanger as claimed in claim 1, characterized in that the hot air outlets (Q2) are arranged in parallel and the partition (23) is arranged in parallel between the hot air inlet (Q1) and the hot air outlet (Q2).
4. A fuel-air heat exchanger according to claim 3, characterized in that the hot air inlet (Q1) and the hot air outlet (Q2) are symmetrically distributed with respect to the partition (23).
5. The fuel-air heat exchanger as set forth in claim 1, characterized in that the fuel inlet (Y1) and the fuel outlet (Y2) are distributed on both upper and lower sides of the housing (21) and are vertically non-collinear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210405629.9A CN115060093A (en) | 2022-04-18 | 2022-04-18 | Fuel-air heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210405629.9A CN115060093A (en) | 2022-04-18 | 2022-04-18 | Fuel-air heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115060093A true CN115060093A (en) | 2022-09-16 |
Family
ID=83197525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210405629.9A Pending CN115060093A (en) | 2022-04-18 | 2022-04-18 | Fuel-air heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115060093A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR598229A (en) * | 1925-05-14 | 1925-12-09 | Ets Delaunay Belleville Sa | Oil or other liquid heater |
| CN2769813Y (en) * | 2005-01-13 | 2006-04-05 | 中国石油化工集团公司 | U-shape pipe type heat exchanger |
| CN202511658U (en) * | 2011-12-21 | 2012-10-31 | 洛阳双瑞特种装备有限公司 | Spiral baffle heat exchanger for oil refining device |
| CN208108885U (en) * | 2018-04-25 | 2018-11-16 | 淄博凯志化工设备制造有限公司 | Dual-tubesheet glass-lined heat exchanger |
| CN112228226A (en) * | 2020-10-16 | 2021-01-15 | 中国航发四川燃气涡轮研究院 | Aircraft engine turbine rotor cooling thermal management system |
| CN213515174U (en) * | 2020-10-27 | 2021-06-22 | 山西君泽环保科技有限公司 | Heat exchanger for sewage treatment |
| CN113566611A (en) * | 2021-08-12 | 2021-10-29 | 上海蓝滨石化设备有限责任公司 | U-shaped pipe three-flow heat exchanger |
| CN113776362A (en) * | 2021-08-20 | 2021-12-10 | 杜麒麟 | High-temperature shell-and-tube heat exchanger |
-
2022
- 2022-04-18 CN CN202210405629.9A patent/CN115060093A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR598229A (en) * | 1925-05-14 | 1925-12-09 | Ets Delaunay Belleville Sa | Oil or other liquid heater |
| CN2769813Y (en) * | 2005-01-13 | 2006-04-05 | 中国石油化工集团公司 | U-shape pipe type heat exchanger |
| CN202511658U (en) * | 2011-12-21 | 2012-10-31 | 洛阳双瑞特种装备有限公司 | Spiral baffle heat exchanger for oil refining device |
| CN208108885U (en) * | 2018-04-25 | 2018-11-16 | 淄博凯志化工设备制造有限公司 | Dual-tubesheet glass-lined heat exchanger |
| CN112228226A (en) * | 2020-10-16 | 2021-01-15 | 中国航发四川燃气涡轮研究院 | Aircraft engine turbine rotor cooling thermal management system |
| CN213515174U (en) * | 2020-10-27 | 2021-06-22 | 山西君泽环保科技有限公司 | Heat exchanger for sewage treatment |
| CN113566611A (en) * | 2021-08-12 | 2021-10-29 | 上海蓝滨石化设备有限责任公司 | U-shaped pipe three-flow heat exchanger |
| CN113776362A (en) * | 2021-08-20 | 2021-12-10 | 杜麒麟 | High-temperature shell-and-tube heat exchanger |
Non-Patent Citations (1)
| Title |
|---|
| 刘震宇: "加氢装置用双壳程换热器的结构设计、制造及工程应用", 石油化工设备技术, no. 01, 30 January 2002 (2002-01-30) * |
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