CN208075632U - A kind of FTGP finned heat exchangers - Google Patents

Abstract

The utility model discloses an FTGP fin heat exchanger, which relates to the technical field of heat exchange equipment. The heat exchanger uses a plurality of S-curved FTGPs arranged at intervals to form a cold aisle, and the cold aisle is arranged between two hot aisle outer frames. A cold fluid is passed into the gap of the FTGP of the cold channel, and a phase change heat transfer occurs in the FTGP to realize heat exchange between the cold and hot fluids. When the heat exchanger provided in this embodiment is applied to an aero-engine, the compactness can reach 1412, and the mass-to-power ratio can reach 387kW/kg, which greatly improves the compactness and mass-to-power ratio, and can meet the needs of future aero-engines. Smaller space and lighter heat exchange equipment meet the requirements of high power heat exchange.

Description

A FTGP fin heat exchanger

technical field

The utility model relates to the technical field of heat exchange equipment, in particular to an FTGP fin heat exchanger.

Background technique

At present, the heat exchangers used in the field of aero-engines mostly adopt plate-fin and shell-and-tube heat exchange structures, and have accumulated rich experience in fin heat conduction and enhanced convection heat transfer technology, but due to the inherent thermal conductivity of the material itself (copper 400W /m K, aluminum 160W/m K) limit, and single-phase heat transfer (air forced convection heat transfer coefficient 103W/m ² K) bottleneck limit, the compactness and heat transfer power per unit mass of the plate-fin heat exchanger have reached the limit , cannot meet the requirements of realizing high-power heat exchange with smaller space and lighter heat exchanger equipment in future aero-engines.

Utility model content

The purpose of this utility model is to provide an FTGP fin heat exchanger, thereby solving the aforementioned problems existing in the prior art.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

An FTGP fin heat exchanger, including a plurality of heat exchange modules, each of which includes two hot aisle frames, and the area between the two hot aisle frames is set as a cold aisle , the cold aisle is composed of a plurality of FTGPs arranged at intervals, and the FTGPs are arranged in an S-shaped curve; when in use, hot fluid is passed into the outer frame of the hot aisle, and two adjacent FTGPs in the cold aisle Pass cold fluid into the gap.

Preferably, fins are arranged at intervals in each of the outer frames of the heat channel.

Preferably, both the outer frame of the heat channel and the fins are made of aluminum material.

Preferably, the outer frame of the heat channel and the fins are processed into an integrated structure.

Preferably, the distance between two adjacent fins is 4.28mm.

Preferably, the end of the FTGP and the outer frame of the hot aisle are welded or processed into an integrated structure.

Preferably, the distance between two adjacent FTGPs is 2.6 mm.

Preferably, a plurality of the heat exchange modules are regularly arranged and connected as a whole, and two adjacent heat exchange modules share one outer frame of the hot channel.

The beneficial effect of the utility model is: the FTGP fin heat exchanger provided by the embodiment of the utility model uses a plurality of FTGPs arranged in an S-shaped curve to form a cold channel, and the cold channel is arranged on the outer frames of the two hot channels During use, hot fluid is passed into the outer frame of the hot aisle, and cold fluid is passed into the gap of the FTGP of the cold aisle, and phase change heat transfer occurs in the FTGP to realize the heat exchange of cold and hot fluids . When the heat exchanger provided in this embodiment is applied to an aero-engine, the compactness can reach 1412, and the mass-to-power ratio can reach 387kW/kg, which greatly improves the compactness and mass-to-power ratio, and can meet the needs of future aero-engines. Smaller space and lighter heat exchange equipment meet the requirements of high power heat exchange.

Description of drawings

Fig. 1 is the front view of the FTGP fin heat exchanger provided by the utility model;

Fig. 2 is a schematic diagram of the overall structure of the FTGP fin heat exchanger provided by the utility model;

Figure 3a is a schematic diagram of the working principle of the FTGP fin heat exchanger provided by the utility model;

Fig. 3b The hot end of the FTGP fin heat exchanger provided by the utility model stimulates the internal phase change heat transfer mechanism diagram of TGP;

Figure 3c is a schematic diagram of the TGP enhanced convection heat transfer mechanism at the cold end of the FTGP fin heat exchanger provided by the utility model;

Fig. 4 is the schematic structural diagram of the cooling air system of the aero-engine provided by Embodiment 1;

Fig. 5 is the schematic structural diagram of the intercooler heat recovery system of the aero-engine provided in Embodiment 2;

Fig. 6 is the schematic structural diagram of the precooling system of the aero-engine provided by embodiment three;

Figures 7a1 and 7a2 are schematic structural diagrams of cross-flow heat exchangers in the systems of Embodiments 1, 2 and 3;

Figure 7b is a schematic structural view of the counterflow heat exchanger in the systems of Embodiments 1, 2, and 3;

Fig. 7c is a schematic structural diagram of fork counter-flow heat exchangers in the systems of Embodiments 1, 2, and 3.

In the figure, the meanings of the symbols are as follows:

1 hot aisle frame, 2 thermal fluid, 3 fins, 4FTGP, 5 cold fluid, 6 intake air, 7 intercooler, 8 sea water/fresh water heat exchanger, 9 pipeline valve, 10 combustion chamber, 11 fuel, 12 High-pressure turbine, 13 Power turbine guide, 14 Power turbine, 15 Low-pressure turbine, 16 Heater, 17 Exhaust gas, 18 Fan, 19 High-pressure compressor, 20 Diffuser, 21 Air-to-air heat exchanger, 22 Cooling air, 23 Side Road system, 24 fuel oil, 25 casing, 26 combustion chamber, 27 high-pressure compressor bleed air, 28 seal, 29 clapboard, 30 plate bundle, 31 intake port, 32 precooler, 33 turbocharger, 34 Helium circulator, 35 heat exchanger, 36 liquid hydrogen pump, 37 liquid oxygen pump, 38 premix burner, 39 rocket launcher.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not intended to limit the present utility model.

As shown in Figure 1-2, the embodiment of the utility model provides an FTGP fin heat exchanger, including a plurality of heat exchange modules, each of which includes two heat channel outer frames 1, The area between the two hot aisle frames 1 is set as a cold aisle, the cold aisle is composed of a plurality of FTGP4 arranged at intervals, and the FTGP4 is arranged in an S-shaped curve; when in use, the hot aisle frame 1 is passed into the hot fluid 2 , the cold fluid 5 is passed into the gap between two adjacent FTGPs in the cold channel.

In the above structure, the FTGPs arranged at intervals in the cold aisle serve as both the substrate and the fins, and play the role of heat conduction and heat dissipation. During use, the hot fluid is passed into the outer frame of the hot aisle, and the cold fluid is passed into the gap between two adjacent FTGPs in the cold aisle. The FTGP in contact with the hot fluid side is the evaporation end, and the FTPG in contact with the cold fluid is the condensation end. At the end, the heat of the hot fluid is transferred to the FTGP, so that the working medium in the FTGP evaporates or boils to absorb heat, and the steam flows to the condensation end under the action of the pressure difference, condenses and dissipates heat, and transfers the heat to the cold fluid, thereby realizing the exchange of hot and cold fluids hot. Its working principle is shown in Figures 3a, 3b and 3c.

Therefore, the heat exchanger provided by the embodiment of the present invention uses a plurality of S-curved FTGP (Flexible Thermal Ground Plane, flexible soaking plates) arranged at intervals to form a cold channel, and the phase change with higher heat exchange capacity Heat transfer (equivalent heat transfer coefficient 10 ⁴ W/m ² K) is cleverly introduced into the heat exchanger, and the use of the vapor chamber has a high equivalent thermal conductivity in two-dimensional or even three-dimensional directions (up to 3-5 times that of copper) In order to realize the weight reduction of the heat exchanger and the great improvement of the mass-to-power ratio, when the heat exchanger provided by this embodiment is applied to an aeroengine, the compactness can reach 1412, and the mass-to-power ratio can reach 387kW /kg, which can meet the requirements of future aero-engines to achieve high-power heat exchange with smaller space and lighter heat exchange equipment.

In this embodiment, fins 3 are arranged at intervals in each heat channel outer frame 1 .

In the above structure, since hot fluid needs to be passed through the outer frame of the heat channel during use, some fins are arranged at intervals in the outer frame to increase the heat exchange area and improve the heat exchange efficiency of the heat exchanger.

In this embodiment, both the outer frame 1 of the hot channel and the fins 3 can be made of aluminum material.

In this embodiment, the heat channel outer frame 1 and the fins 3 can be processed into an integrated structure.

As can be understood by those skilled in the art, the outer frame of the heat aisle and the fins may also be connected through other connection methods.

In this embodiment, the distance between two adjacent fins 3 may be 4.28mm.

In this embodiment, the distance between the heat channel fins is 4.28mm, so that the compactness of the heat exchanger can reach more than 1000, and the mass-to-power ratio can reach more than 300.

As those skilled in the art can understand, the distance between two adjacent fins in the heat channel can also be designed accordingly according to different requirements.

In this embodiment, the end of the FTGP4 and the outer frame of the hot aisle 1 are welded or processed into an integrated structure.

In this embodiment, the distance between two adjacent FTGP4s may be 2.6mm.

In this embodiment, the distance between two adjacent FTGP4 is selected as 2.6mm, which can make the compactness of the heat exchanger more than 1000, and the mass-to-power ratio can reach more than 300.

As can be understood by those skilled in the art, the distance between two adjacent FTGPs can also be designed accordingly according to different requirements.

In this embodiment, a plurality of the heat exchange modules are horizontally arranged and connected as one, and two adjacent heat exchange modules share one outer frame of the hot channel.

By adopting the above-mentioned structure, heat exchangers of different scales and sizes can be obtained more flexibly, and at the same time, it is also beneficial to operations such as maintenance and renewal of the heat exchanger in the later stage.

The application of the FTGP fin heat exchanger provided by the embodiment of the present invention in future aero-engines can refer to the following three embodiments:

Embodiment one

As shown in Figure 4, in the cooling air system of the aero-engine, the cooling air is cooled by the air-to-air heat exchanger, and the quality of the cooling air is improved to further reduce the temperature of the hot end components.

Embodiment two

As shown in Figure 5, in the intercooling and heat recovery system of an aero-engine, the mainstream gas exchanges heat with the external air through the intercooler (heat exchanger). The compression work of the small compressor; at the same time, through the heat recovery link, the heat of the exhaust gas at the outlet of the turbine is recovered to increase the utilization rate of energy.

Embodiment Three

As shown in Figure 6, the aero-engine pre-cooling system is to install a pre-cooling heat exchanger in front of the compressor of the conventional turbine engine to cool the airflow in the intake passage, reduce the temperature of the airflow, and expand the working range of the turbine engine.

The FTGP fin heat exchangers applied to the aero-engines in the above three embodiments can adopt the following three different flow modes: cross-flow type (refer to Fig. 7a1, 7a2), counter-flow type (refer to Fig. 7b), Fork counterflow (see Figure 7c).

Based on the above examples, it can be seen that the design of an aero-engine heat exchanger has the following basic requirements: firstly, to ensure the normal operation of the engine, and secondly, to ensure its own good operation. On this basis, it is necessary to pursue small size, light weight and high reliability, and The overall structure and performance requirements of power transmission are realized in an optimized way. Therefore, in the heat exchanger design, the following requirements should be made from the aspects of structure, energy consumption, reliability, operation and process:

The heat exchanger has compact structure, small size and light weight;

·Under all possible loads and external conditions, the heat exchanger can work reliably and meet the working requirements of the engine;

Meet the strength and reliability requirements of the engine working environment;

·The heat exchanger is arranged reasonably in the system, which is convenient for installation, disassembly and monitoring.

The vapor chamber heat exchanger provided in this embodiment can well meet the above requirements, so it can be well applied to aero-engines.

By adopting the above-mentioned technical solution disclosed in the utility model, the following beneficial effects are obtained: the FTGP fin heat exchanger provided in the embodiment of the utility model uses a plurality of S-shaped curved FTGPs arranged at intervals to form a cold channel, and the The cold aisle is arranged between two hot aisle outer frames. When in use, hot fluid is passed into the hot aisle outer frame, and cold fluid is passed into the gap of the FTGP of the cold aisle, and a phase change occurs in the FTGP Heat transfer, realize the heat exchange of cold and hot fluids. When the heat exchanger provided in this embodiment is applied to an aero-engine, the compactness can reach 1412, and the mass-to-power ratio can reach 387kW/kg, which greatly improves the compactness and mass-to-power ratio, and can meet the needs of future aero-engines. Smaller space and lighter heat exchange equipment meet the requirements of high power heat exchange.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be considered within the protection scope of the present utility model.

Claims (8)

1. a kind of FTGP finned heat exchangers, which is characterized in that including multiple heat exchange modules, each heat exchange module includes two A passage of heat outline border, the region between two passage of heat outline borders are set as cold passage, and the cold passage is by between multiple FTGP Every being arranged to make up, the FTGP is set as sigmoid curve shape；In use, hot fluid is passed through in the passage of heat outline border, it is described cold logical In road cold fluid is passed through in the gap of the two neighboring FTGP.

2. FTGP finned heat exchangers according to claim 1, which is characterized in that be spaced in each passage of heat outline border It is arranged with fin.

3. FTGP finned heat exchangers according to claim 2, which is characterized in that the passage of heat outline border and the fin are equal It is prepared by aluminum material.

4. FTGP finned heat exchangers according to claim 2, which is characterized in that the passage of heat outline border and the fin add The integrated structure of work.

5. FTGP finned heat exchangers according to claim 2, which is characterized in that the distance between two neighboring described fin For 4.28mm.

6. FTGP finned heat exchangers according to claim 1, which is characterized in that the end of the FTGP and the passage of heat Integral structure is welded to connect or is processed between outline border.

7. FTGP finned heat exchangers according to claim 1, which is characterized in that the distance between two neighboring described FTGP For 2.6mm.

8. FTGP finned heat exchangers according to claim 1, which is characterized in that the regularly arranged company of multiple heat exchange modules It is connected in one, two adjacent heat exchange modules share a passage of heat outline border.