CN117189370A - Air inlet precooling heat exchanger with multiple modes and aircraft - Google Patents

Abstract

The application discloses an air inlet precooling heat exchanger with multiple modes and an aircraft, wherein the air inlet precooling heat exchanger comprises a first radiator and a second radiator; the first radiator comprises at least two first radiating components, and a first air passing hole is formed between every two adjacent first radiating components; the second radiator comprises at least two second radiating components, and a second air passing hole is formed between every two adjacent second radiating components; the first radiator and the second radiator can move relatively, and at least two modes are provided between the first radiator and the second radiator: a first mode, wherein the first through-air hole is aligned with the second through-air hole; and a second mode in which the first via is aligned or partially aligned with the second heat dissipating component and the second via is aligned or partially aligned with the first heat dissipating component. The application can conveniently switch between two modes of low heat exchange/low flow resistance and high heat exchange/high flow resistance according to the requirements of different flying speeds of the engine.

Description

Air inlet precooling heat exchanger with multiple modes and aircraft

Technical Field

The application relates to the technical field of high-speed engine precooling heat exchangers, in particular to an air inlet precooling heat exchanger with multiple modes and an aircraft.

Background

The high speed of aircraft has great military and civilian value.

The aero-turbine engine has the characteristics of horizontal take-off and landing, reusability and high specific impulse, and is a mainstream aero-engine scheme. However, aerodynamic heating effects typically limit the flight limits of modern advanced aeroturbine engines to ma2.5. One of the main schemes for further improving the flying speed of the turbine is to cool the punched air by adopting a heat exchanger structure, so that the temperature of the air flow at the inlet of the turbine is reduced, and the temperature increase of the air flow caused by the pneumatic heating effect during high-speed flying is counteracted, so that the turbine can fly at a higher speed.

The precooling systems of the 'curved knife' and 'petitioning' engines of a certain company are most representative, and the precooler consists of 16000 thin-wall heat exchange capillaries, wherein the diameter of each heat exchange capillary is only 0.88mm, the wall thickness is 0.04mm, and the total length reaches 20km; inside is supercritical helium as a coolant, with extremely high internal pressure. The heat exchange coefficient is inversely proportional to the channel diameter, and the capillary diameter is reduced, so that the capillary has extremely strong cooling capacity, but the disadvantage of the capillary is that the processing difficulty is high, and particularly, extremely high requirements are imposed on the welding process of the capillary because of the high internal pressure of the tube and the extremely small wall thickness of the capillary. The close-packed capillary pads present a significant challenge to the welding technique. The precooling heat exchanger has excellent performance, so that the latter adopts a similar capillary tube type heat exchanger structure. As domestic CN107218133a discloses a high-efficiency compact pre-cooling heat exchanger for pre-cooling air suction type engines, the schematic diagram is as follows, which is very close to the pre-cooling heat exchanger of the company in principle. Except that the flow direction of the internal cooling fluid is different. As previously analyzed, the difficulty and cost of processing capillary heat exchangers has limited the development of this technology. CN108910059a discloses a precooling heat exchange structure, the inner wall of the structure is provided with a plurality of convex heat exchange microelements, and a cooling channel for cooling medium circulation is formed between the outer wall and the inner wall. The problem of this structure lies in that the heat transfer area is little and leads to total heat transfer ability not enough, can't be used to the occasion of air-intake precooling of air-breathing engine (heat transfer capacity demand is up to 100MW order).

Many precooler structures such as CN107218133a belong to cross flow heat exchangers. The fluid on the hot side of the heat exchanger is air, and the air is supplied to the downstream engine after passing through the heat exchanger, so that the multi-flow arrangement with excessive flow loss cannot be selected; while the fluid (water, oil, supercritical helium, etc.) on the cold side of the heat exchanger may be routed through multiple passes, there is still the problem of uneven temperature distribution of the heat exchanger outlet air.

The existing precooling heat exchanger structure can reduce the air inlet temperature, but also increases the flow resistance. The requirements of different flight Mas on the precooler are different, namely the heat exchanger is sensitive to flow loss during low-speed flight, and the expected requirements can be met by lower flow loss and smaller heat exchange effect; and the heat exchanger is insensitive to flow loss in high-speed flight, and needs to have a larger heat exchange effect. I.e., low-speed flight requires "low loss" and high-speed flight requires "high heat transfer".

How to realize the conversion of the radiator in the modes of low loss and high heat exchange is one of the technical problems to be solved in the prior art.

Disclosure of Invention

The application aims to provide an air inlet precooling heat exchanger with multiple modes and an aircraft, which are used for solving the defects in the prior art, and can be conveniently switched between two modes of low heat exchange/low flow resistance and high heat exchange/high flow resistance according to the requirements of different flying speeds of an engine.

The application provides an air inlet precooling heat exchanger with multiple modes, which comprises a first radiator and a second radiator;

the first radiator comprises at least two first radiating components, and a first air passing hole is formed between every two adjacent first radiating components;

the second radiator comprises at least two second radiating components, and a second air passing hole is formed between every two adjacent second radiating components;

the first radiator and the second radiator can move relatively, and at least two modes are provided between the first radiator and the second radiator:

a first mode, wherein the first through-air hole is aligned with the second through-air hole;

and a second mode in which the first via is aligned or partially aligned with the second heat dissipating component and the second via is aligned or partially aligned with the first heat dissipating component.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the two ends of the plurality of first radiating components are respectively connected with a first radiating branch pipe to form a first radiating module; the plurality of first heat dissipation modules are arranged at intervals along the air inlet direction, and a first accommodating space is arranged between every two adjacent first heat dissipation modules;

two ends of the plurality of second heat dissipation components are respectively connected with a second heat dissipation branch pipe to form a second heat dissipation module; the plurality of second heat dissipation modules are arranged at intervals along the air inlet direction, and a second accommodating space is arranged between every two adjacent second heat dissipation modules;

the first accommodation space is used for accommodating the second heat dissipation module, and the second accommodation space is used for accommodating the first heat dissipation module.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the first radiator further comprises two first main pipes, and the two first heat radiation branch pipes on the first heat radiation module are respectively communicated with the two first main pipes;

the second radiator also comprises two second main pipes, and the two second heat radiation branch pipes on the second heat radiation module are respectively communicated with the two second main pipes.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the first heat dissipation assembly comprises a first heat dissipation flat tube and a first heat dissipation fin;

two ends of the first heat dissipation flat tube are respectively communicated with two corresponding first heat dissipation branch tubes; the first radiating fins are fixedly arranged on the periphery of the first radiating flat tube;

the second heat dissipation assembly comprises a second heat dissipation flat tube and second heat dissipation fins;

two ends of the second heat dissipation flat tube are respectively communicated with two corresponding second heat dissipation branch tubes; the second radiating fins are fixedly arranged on the periphery of the second radiating flat tube.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the length direction of the first radiating fin is perpendicular to the length direction of the first radiating flat tube;

the length direction of the second radiating fin is perpendicular to the length direction of the second radiating flat tube.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the device also comprises a fixed plate and a driving assembly;

the first radiator is fixedly connected with the fixed plate, one end of the driving component is connected with the fixed plate, and the other end of the driving component is connected with the second radiator; the driving assembly is used for driving the second radiator to switch between a first mode and a second mode.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the driving component is a ball screw, a telescopic cylinder, a hydraulic cylinder, a cam component, a worm gear mechanism or a gear rack mechanism.

An intake pre-cooling heat exchanger with multiple modes as described above, wherein optionally: the heat radiator comprises a first radiator, a second radiator, a first heat radiation component and a second heat radiation component, and is characterized by further comprising a shell, wherein the shell is fixedly connected with the second radiator, the shell is connected with the first radiator in a sliding mode, and the first heat radiation component and the second heat radiation component are both positioned in the shell.

The application also proposes an aircraft comprising an inlet pre-cooling heat exchanger with multiple modes according to any one of the preceding claims;

when the flying speed of the aircraft is lower than a set speed value, the air inlet precooling heat exchanger is in a first mode;

and when the flying speed of the aircraft is not lower than a set speed value, the air inlet precooling heat exchanger is in a second mode.

An aircraft as described above, wherein optionally the set speed is mach 2 to mach 3.

Compared with the prior art, the application has simple structure, can switch modes according to different flying speeds of the engine, switches between two modes of low heat exchange/low flow resistance and high heat exchange/high flow resistance, and can ensure that the temperature uniformity of the air at the outlet of the heat exchanger is good.

Drawings

FIG. 1 is a schematic diagram showing a spatial distribution diagram of a first heat sink and a second heat sink according to the present application;

FIG. 2 is a perspective view of a first heat dissipating assembly according to the present application;

FIG. 3 is a perspective view of a second heat dissipating assembly according to the present application;

FIG. 4 is a perspective view of a first heat sink according to the present application;

FIG. 5 is a perspective view of a second heat sink according to the present application;

FIG. 6 is a schematic diagram illustrating a first heat sink and a second heat sink according to the present application;

fig. 7 is a schematic view of a mounting structure of a housing according to the present application.

Reference numerals illustrate:

1-first radiating component, 2-first through-air hole, 3-second radiating component, 4-second through-air hole, 5-first radiating branch pipe, 6-first accommodation space, 7-second radiating branch pipe, 8-second accommodation space, 9-first main pipe, 10-second main pipe, 11-fixed plate, 12-casing.

101-first heat dissipation flat tubes and 102-first heat dissipation fins;

301-second heat dissipation flat tubes, 302-second heat dissipation fins.

Detailed Description

The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In a first embodiment of the present application:

as shown in fig. 1 to 6, an intake pre-cooling heat exchanger with multiple modes includes a first radiator and a second radiator; the first radiator comprises at least two first radiating components 1, the first radiating components 1 are arranged in parallel, and a first air through hole 2 is arranged between every two adjacent first radiating components 1; the second radiator comprises at least two second radiating components 3, the second radiating components 3 are arranged in parallel, and a second air through hole 4 is arranged between every two adjacent second radiating components 3; the first radiator and the second radiator can move relatively, and at least two modes are provided between the first radiator and the second radiator: a first mode, wherein the first through-air hole 2 is aligned with the second through-air hole 4; in a second mode, the first through-air hole 2 is aligned or partially aligned with the second heat dissipating component 3, and the second through-air hole 4 is aligned or partially aligned with the first heat dissipating component 1. Through the movement between the first radiator and the second radiator, the aircraft can be subjected to mode switching at different flight speeds, and particularly, when the aircraft flies at a high speed, the first radiator and the second radiator are in a second mode, and when the aircraft flows through the first radiator and the second radiator, the aircraft receives high resistance, has high pressure loss and has high heat exchange performance; when flying at a low speed, the first radiator and the second radiator are in a first mode, and when air flows through the heat exchanger, the resistance is small, the pressure loss is small, and the heat exchange performance is weak.

In the embodiment, the switching manner between the first mode and the second mode includes moving or rotating the first heat dissipating component 1 and the second heat dissipating component 3 relatively. The first heat dissipation component 1 and the second heat dissipation component 3 may be arranged in one or more rows respectively or distributed along a circumferential array based on a switching manner of movement or rotation. When the first heat dissipation component 1 and the second heat dissipation component 3 are arranged in rows, the length direction is perpendicular to the arrangement direction; when distributed in a circumferential array, the length direction of the first heat dissipation element 1 or the second heat dissipation element 3 is consistent with the radial direction.

In the present embodiment, only the first heat dissipation members 3 are described in a manner of being arranged in a plurality of rows. Specifically, in order to better realize that the two ends of the plurality of first heat dissipation components 1 are respectively connected with first heat dissipation branch pipes 5 to form a first heat dissipation module; the plurality of first heat dissipation modules are arranged at intervals along the air inlet direction, and a first accommodating space 6 is arranged between the adjacent first heat dissipation modules. Specifically, the first heat dissipation branch pipe 5 may be made of a material having good heat conduction properties, such as copper, aluminum, titanium alloy, stainless steel, high-temperature alloy steel, or the like.

The plurality of first heat dissipation modules are arranged at intervals along the direction perpendicular to the air inlet direction, that is, the first heat dissipation assemblies 1 are arranged in a rectangular array mode. The first accommodating space 6 is crisscrossed with the first wind through holes 2.

Two ends of the second heat dissipation components 3 are respectively connected with a second heat dissipation branch pipe 7 to form a second heat dissipation module; the second heat dissipation modules are arranged at intervals along the air inlet direction, and a second accommodating space 8 is arranged between every two adjacent second heat dissipation modules. Specifically, the first heat dissipation branch pipe 5 may be made of a material having good heat conduction properties, such as copper, aluminum, titanium alloy, stainless steel, high-temperature alloy steel, or the like.

The second heat dissipation modules are arranged at intervals along the direction perpendicular to the air inlet direction, that is, the second heat dissipation assemblies 3 are arranged in a rectangular array mode. The second accommodating space 8 is crisscrossed with the second wind through holes 4.

The first accommodating space 6 is used for accommodating a second heat dissipation module, and the second accommodating space 8 is used for accommodating a first heat dissipation module. In specific implementation, the first heat dissipation module and the second heat dissipation module can move relatively to realize switching between the first mode and the second mode. In this embodiment, the moving direction of the first heat dissipation module or the second heat dissipation module, the length direction of the first heat dissipation module, and the air inlet direction are perpendicular to each other.

In the specific implementation, in order to achieve a better heat dissipation effect, a water cooling mode may be used for cooling, specifically, the first radiator further includes two first main pipes 9, and the two first heat dissipation branch pipes 5 on the first heat dissipation module are respectively communicated with the two first main pipes 9. That is, each first heat dissipation component corresponds to two first heat dissipation branch pipes 5, and each second heat dissipation component corresponds to two first heat dissipation branch pipes 5 and are respectively communicated with two first main pipes 9. In this way, the cooling liquid can flow into the first heat dissipation assembly 1 through the first main pipe 9 and the first heat dissipation branch pipe 5, and then flow out through the first heat dissipation branch pipe 5 and the first main pipe 9 at the other side, so as to achieve the effect of water cooling. In specific implementation, the cooling liquid can be heat conducting oil such as water, kerosene, glycol and the like, supercritical fluid such as supercritical helium, hydrogen, carbon dioxide and the like, and liquid metal such as sodium-potassium alloy, gallium-indium-tin alloy, lead-bismuth alloy, mercury and the like.

Similarly, the second radiator further comprises two second main pipes 10, and the two second heat dissipation branch pipes 7 on the second heat dissipation module are respectively communicated with the two second main pipes 10. That is, each second heat dissipation component 3 corresponds to two second heat dissipation branch pipes 7, and the two second heat dissipation branch pipes 7 corresponding to each second heat dissipation component 3 are respectively communicated with the two second main pipes 10. In this way, the cooling liquid can flow into the second heat dissipation assembly 3 through the second main pipe 10 and the second heat dissipation branch pipe 7, and then flow out through the second heat dissipation branch pipe 7 and the second main pipe 10 at the other side, so as to achieve the effect of water cooling.

In a specific implementation, in order to further improve the heat dissipation effect, the first heat dissipation assembly 1 includes a first heat dissipation flat tube 101 and a first heat dissipation fin 102. Specifically, the plurality of first heat dissipation fins 102 are continuously arranged on the side surface of the first heat dissipation flat tube 101, which is close to the adjacent first air passing hole 2, in a shape of a Chinese character 'ji', so that air contacts with the first heat dissipation fins 102, thereby achieving the purpose of heat dissipation. Two ends of the first heat dissipation flat tube 101 are respectively communicated with two corresponding first heat dissipation branch tubes 5; the first heat dissipation fins 102 are fixedly installed on the outer periphery of the first heat dissipation flat tube 101.

In a specific implementation, the second heat dissipation assembly 3 includes a second heat dissipation flat tube 301 and a second heat dissipation fin 302; two ends of the second heat dissipation flat tube 301 are respectively communicated with two corresponding second heat dissipation branch tubes 7; the second heat dissipation fins 302 are fixedly installed on the outer periphery of the second heat dissipation flat tube 301. Specifically, the second heat dissipation assembly 3 and the first heat dissipation assembly 1 have the same structure, that is, the plurality of second heat dissipation fins 302 are continuously arranged on the side of the second heat dissipation flat tube 301101, which is close to the adjacent second air passing hole 4, in a shape of a Chinese character 'ji', so that air contacts with the second heat dissipation fins 302, thereby achieving the purpose of heat dissipation.

The length direction of the first heat dissipation fins 102 is perpendicular to the length direction of the first heat dissipation flat tubes 101; the length direction of the second heat dissipation fins 302 is perpendicular to the length direction of the second heat dissipation flat tubes 301. Specifically, the length direction of the first heat dissipation fin 102 refers to a direction perpendicular to the cross section of the figure, which is consistent with the air inlet direction, and when the air flow passes through the first heat dissipation fin 102 or the second heat dissipation fin 302, heat on the first heat dissipation fin 102 and the second heat dissipation fin 302 can be taken away.

In particular embodiments, the present embodiment further includes a fixed plate 11 and a drive assembly 13 for effecting relative movement between the first and second heat sinks. The drive assembly 13 may be an electric motor or may be a hydraulic or pneumatic device.

The first radiator is fixedly connected with the fixed plate 11, one end of the driving component 13 is connected with the fixed plate 11, and the other end of the driving component is connected with the second radiator; the driving assembly 13 is configured to drive the second radiator to switch between a first mode and a second mode. Specifically, the driving component 13 is a ball screw, a telescopic cylinder, a hydraulic cylinder, a cam component, a worm gear mechanism or a gear rack mechanism.

In this embodiment, in order to enable the gas to sufficiently pass through the first heat sink and the second heat sink, specifically, the heat dissipation device further includes a housing 12, the housing 12 is fixedly connected with the second heat sink, the housing 12 is slidably connected with the first heat sink, and the first heat dissipation component 1 and the second heat dissipation component 3 are both located in the housing 12. Specifically, the casing 12 is a cylindrical structure with openings at two ends, and the length direction of the casing 12 is the same as the air inlet direction, that is, air enters the first air passing hole 2 and the second air passing hole 4 through the openings of the casing 12, so that the air flow can be ensured to fully pass through the first radiator and the second radiator, and the heat dissipation effect is improved. That is, the case 12 is defined as a boundary restricting the flow of air. In particular, the housing 12 is provided with holes for sliding movement of the first radiator.

In a specific implementation, for manufacturing convenience, the shape, the junction and the size of the first radiator and the second radiator are equal.

Example 2

The present embodiment is a further improvement on the basis of embodiment 1, and the same points are not described in detail, and only the differences are described below.

Referring to fig. 1 to 7, in the embodiment, since the first heat dissipation fin and the second heat dissipation fin 302 are provided, the first mode and the second mode can be switched by aligning or dislocating the first heat dissipation fin and the second heat dissipation fin 302.

In this case, in the first mode, the first heat radiation flat tube is aligned with the second heat radiation flat tube 301, and the first heat radiation fins 102 and the second heat radiation fins 302 are offset. In the second mode, the first heat dissipating flat tube is aligned with the second heat dissipating flat tube 301, except that the first heat dissipating fin 102 is offset from the second heat dissipating fin 302.

Correspondingly, the relative moving direction between the first heat dissipation assembly and the second heat dissipation assembly is the length direction of the first heat dissipation flat tube.

That is, the first mode differs from the second mode only in whether the first heat radiating fins and the second heat radiating fins 302 are aligned. The first heat dissipating flat tube and the second heat dissipating flat tube 301 are always aligned.

In specific implementation, the first tube and the second heat dissipation flat tube 301 have the same structure, the same size, the same material and only different names. The internal height is lower and 1-2 mm, the width is one order of magnitude larger and reaches 10-20 mm.

The height of the first heat sink fins and the second heat sink fins 302 may be selected from a wide range, typically 2-10 mm, as desired.

In the application, the length direction, the width direction and the height direction of the first heat dissipation flat pipes are perpendicular to each other, the width direction of the first heat dissipation flat pipes is consistent with the air inlet direction, and the length direction of the first heat dissipation flat pipes is perpendicular to the air inlet direction and the corresponding first branch pipe direction.

Example 3

The present embodiment is a specific application of embodiment 1 or embodiment 2, and the same points are not described again, and only the differences are described below.

The embodiment provides an aircraft, which includes the air inlet precooling heat exchanger with multiple modes in embodiment 1 or embodiment 2.

When the flying speed of the aircraft is lower than a set speed value, the air inlet precooling heat exchanger is in a first mode; and when the flying speed of the aircraft is not lower than a set speed value, the air inlet precooling heat exchanger is in a second mode. The set speed is mach 2 to 3, preferably 2.5Ma.

When the structure in practical example 1 is used:

when flying at low speed, if Ma is smaller than 2.5, the first heat dissipation flat tube is opposite to the second heat dissipation flat tube 301, and air flow directly enters the second air passing hole from the first air passing hole and then flows out. The heat dissipation capacity is relatively weak, the resistance is relatively small, and the uniformity of the outlet of the heat exchanger is poor.

When flying at high speed, if Ma is more than or equal to 2.5, the first heat dissipation flat tube and the second heat dissipation flat tube 301 are staggered, and air flows in from the first air passing holes, is split by the second heat dissipation flat tube 301, enters into two adjacent second air passing holes, and then flows out. The heat dissipation capacity is relatively strong, the resistance is relatively increased, and the uniformity of air at the outlet of the heat exchanger is good. In order to further improve the heat radiation effect, in this case, the coolant is controlled to flow through the first heat radiation flat tube and the second heat radiation flat tube 301, respectively, and the flow directions of the coolant in the first heat radiation flat tube and the second heat radiation flat tube 301 are opposite. To further improve the cooling effect and uniformity of the air at the outlet of the heat exchanger.

When the structure in embodiment 2 is used:

when the air flows through the heat exchanger, the heat exchange performance of the first radiating fin and the second radiating fin 302 generated by straight fins is weak and the pressure loss is small;

when flying at a high speed, if Ma is more than or equal to 2.5, the first radiating fins and the second radiating fins 302 are staggered, the first radiating component and the second radiating component relatively move by a half fin interval length along the flowing direction of the fluid in the first radiating flat tube or the second radiating flat tube 301, and at the moment, when air flows through the heat exchanger, the air flow between two adjacent first radiating fins is divided by the corresponding second radiating fins 302 after passing through the first radiating component, so that the air with higher middle temperature is fully contacted with the second radiating fins 302, thereby improving the heat exchange effect, but correspondingly, the pressure loss is also increased. In particular, the distance between the adjacent first heat dissipation fins and the distance between the adjacent second heat dissipation fins 302 are both 4mm, and only 2 mm is required to be moved.

While the foregoing is directed to embodiments of the present application, other and further embodiments of the application may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. An intake precooling heat exchanger with multiple modes is characterized by comprising a first radiator and a second radiator;

the first radiator comprises at least two first radiating components (1), and a first air passing hole (2) is formed between every two adjacent first radiating components (1);

the second radiator comprises at least two second radiating components (3), and a second air passing hole (4) is formed between every two adjacent second radiating components (3);

the first radiator and the second radiator can move relatively, and at least two modes are provided between the first radiator and the second radiator:

a first mode, wherein the first wind through hole (2) is aligned with the second wind through hole (4);

and a second mode, wherein the first through-air hole (2) is aligned with or partially aligned with the second heat dissipation component (3), and the second through-air hole (4) is aligned with or partially aligned with the first heat dissipation component (1).

2. The intake precooling heat exchanger with multiple modes as claimed in claim 1, characterized in that: two ends of the plurality of first radiating assemblies (1) are respectively connected with a first radiating branch pipe (5) to form a first radiating module; the plurality of first heat dissipation modules are arranged at intervals along the air inlet direction, and a first accommodating space (6) is arranged between the adjacent first heat dissipation modules;

two ends of the second heat dissipation components (3) are respectively connected with a second heat dissipation branch pipe (7) to form a second heat dissipation module; the plurality of second heat dissipation modules are arranged at intervals along the air inlet direction, and a second accommodating space (8) is arranged between every two adjacent second heat dissipation modules;

the first accommodating space (6) is used for accommodating the second heat dissipation module, and the second accommodating space (8) is used for accommodating the first heat dissipation module.

3. The intake precooling heat exchanger with multiple modes as claimed in claim 2, characterized in that: the first radiator further comprises two first main pipes (9), and the two first heat radiation branch pipes (5) on the first heat radiation module are respectively communicated with the two first main pipes (9);

the second radiator further comprises two second main pipes (10), and the two second heat radiation branch pipes (7) on the second heat radiation module are respectively communicated with the two second main pipes (10).

4. The intake precooling heat exchanger with multiple modes as claimed in claim 2, characterized in that: the first heat dissipation assembly (1) comprises a first heat dissipation flat tube (101) and a first heat dissipation fin (102);

two ends of the first heat dissipation flat tube (101) are respectively communicated with two corresponding first heat dissipation branch tubes (5); the first radiating fins (102) are fixedly arranged on the periphery of the first radiating flat tube (101);

the second heat dissipation assembly (3) comprises a second heat dissipation flat tube (301) and a second heat dissipation fin (302);

two ends of the second heat dissipation flat tube (301) are respectively communicated with two corresponding second heat dissipation branch tubes (7); the second radiating fins (302) are fixedly arranged on the periphery of the second radiating flat tube (301).

5. The intake precooling heat exchanger with multiple modes as claimed in claim 4, wherein: the length direction of the first radiating fin (102) is perpendicular to the length direction of the first radiating flat tube (101);

the length direction of the second radiating fin (302) is perpendicular to the length direction of the second radiating flat tube (301).

6. The intake precooling heat exchanger with multiple modes as claimed in claim 4, wherein: the device also comprises a fixed plate (11) and a driving component (13);

the first radiator is fixedly connected with the fixed plate (11), one end of the driving component is connected with the fixed plate (11), and the other end of the driving component is connected with the second radiator; the driving assembly is used for driving the second radiator to switch between a first mode and a second mode.

7. The intake precooling heat exchanger with multiple modes as claimed in claim 6, wherein: the driving component (13) is a ball screw, a telescopic cylinder, a hydraulic cylinder, a cam component, a worm gear mechanism or a gear rack mechanism.

8. The intake precooling heat exchanger with multiple modes as claimed in claim 4, wherein: the heat radiator comprises a first heat radiator, a second heat radiator, a first heat radiation component (1) and a second heat radiation component (3), and is characterized by further comprising a shell (12), wherein the shell (12) is fixedly connected with the second heat radiator, the shell (12) is in sliding connection with the first heat radiator, and the first heat radiation component (1) and the second heat radiation component (3) are both positioned in the shell (12).

9. An aircraft comprising an inlet pre-chill heat exchanger having multiple modes according to any one of claims 1 to 8;

when the flying speed of the aircraft is lower than a set speed value, the air inlet precooling heat exchanger is in a first mode;

and when the flying speed of the aircraft is not lower than a set speed value, the air inlet precooling heat exchanger is in a second mode.

10. The aircraft of claim 9, wherein the set speed is mach 2 to mach 3.