Active thermal protection equipment based on heat storage material

Abstract

The utility model discloses active thermal protection equipment based on heat storage materials, which comprises a porous hollow metal part and a heat storage part, and vertical ribs are arranged in the porous hollow metal part. A heat storage material filling opening is reserved in one side face of the porous hollow metal part. The active thermal protection equipment based on the heat storage material has the advantages of being simple in structure, low in cost, high in specific heat capacity, large in heat storage density and the like, and can be used for solving the thermal protection problems of unstable heat flow and uneven temperature difference of an aircraft.

Description

Technical Field

[0001] The utility model belongs to the field of active thermal protection of aircraft cabins, and specifically relates to an active thermal protection device based on heat storage materials. Background Art

[0002] As high-speed aircraft develop towards higher Mach numbers, the cabin walls of the aircraft face more serious aerodynamic heating problems. At this time, traditional passive thermal protection systems, due to their large mass and volume burdens, have gradually been unable to meet the thermal protection needs of high-speed aircraft.

[0003] The active thermal protection system can transfer a large part of the heat transmitted to the wall with the cooling medium, and the remaining small part of the heat is radiated out by the wall. The active thermal protection system has a strong cooling capacity. Compared with the pure passive thermal protection system, under the same heat flow, the active cooling thermal protection system can significantly reduce the temperature difference of the aircraft wall, and can realize the temperature and heat flow control of the open-loop or even closed-loop system, complete the combination of structure and function, and realize the integration of heat protection, heat insulation and heat control.

[0004] In order to deal with the cabin thermal protection problem caused by high Mach number aircraft, passive thermal protection systems use low thermal conductivity, large heat sinks, high temperature resistance or ablative materials to arrange in the parts that need thermal protection, which is often accompanied by large volume and mass losses. It is still weak in the case of ultra-high speed and long-term flight in the atmosphere. Therefore, it is necessary to start from the perspective of heat storage, comprehensively consider the use of every bit of heat entering the overall thermal environment of high-speed aircraft, and find new thermal protection methods for cabin walls. Summary of the invention

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: an active thermal protection device based on heat storage material, comprising: a porous hollow metal component and a heat storage component, wherein the porous hollow metal component contains vertical ribs; a heat storage material filling port is reserved on one side of the porous hollow metal component.

[0006] Preferably, the size of the porous hollow metal component is 100*100*10 mm, and the wall thickness is 1 mm.

[0007] Preferably, the hole diameter of the porous hollow metal component ranges from 0.5 to 2 mm, and the hole spacing is 9 mm.

[0008] Preferably, the porous hollow metal component is made of aluminum alloy, stainless steel, titanium alloy or high-temperature alloy.

[0009] Preferably, the heat storage component is composed of a shaped skeleton material and a heat storage material.

[0010] Preferably, the shaping skeleton material is a hydrogel or water-absorbing resin material, and the heat storage material is a phase change heat storage material or a chemical heat storage material.

[0011] Preferably, the filling port is sealed using high temperature glue and fastening screws.

[0012] The active thermal protection device based on the heat storage material of the utility model has the advantages of simple structure, low cost, high specific heat capacity, and large heat storage density, and can be used to solve the thermal protection problems of unstable heat flow and uneven temperature difference of aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the active thermal protection device based on heat storage material of the utility model.

[0014] Figure 2 This is a test diagram of the heat protection effect of the active thermal protection device based on the heat storage material of the utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the present invention, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 The active thermal protection device based on heat storage material of the utility model is shown, including a porous hollow metal component 101 and a heat storage component (not shown in the figure), wherein the size of the porous hollow metal component 101 is 100*100*10mm, the wall thickness is 1mm, the diameter range of the hole 103 of the porous hollow metal component is 0.5-2mm, and the hole spacing is 9mm. The material of the porous hollow metal component 101 is aluminum alloy, stainless steel, titanium alloy or high-temperature alloy. The porous hollow metal component contains vertical ribs (not shown) to strengthen the structure itself. The porous hollow metal structural component 101 is filled with heat storage components, all of which exist in a solid phase state. The side with holes in the metal component is the outer surface in contact with heat. When the heat flux density increases, the heat storage material inside the porous hollow metal component is heated from a solid phase or a liquid phase to a gas phase, absorbs heat, and evaporates from the hole 103, thereby achieving the effect of heat absorption and temperature control on the shell surface and inside.

[0017] A heat storage material filling port 102 is reserved on one side of the porous hollow metal component 101, and the filling port is sealed with high temperature glue and fastening screws.

[0018] The heat storage component is composed of a shaped skeleton material and a heat storage material. The shaped skeleton material is a hydrogel or water-absorbing resin material, and the heat storage material is a phase change heat storage material or a chemical heat storage material.

[0019] The following describes the preparation process and test results of the active thermal protection equipment based on heat storage materials of the utility model. First, use the 3D printing process to print the porous hollow metal component 101, and then finely process the surface of the metal component. The component size is 100*100*10mm and the wall thickness is 1mm. 1% water-absorbing resin and 15% ammonium bicarbonate powder are filled into the metal component shell through the filling port, and then the remaining water is poured into the shell. The water-absorbing resin is fixed to a total amount of 80g of ammonium bicarbonate heat storage material. Finally, the filling port is sealed with inorganic high-temperature glue and fastening screws.

[0020] The thermal protection equipment was placed in a pneumatic high temperature test device. Under high heat flux density, the surface temperature rise rate of the metal shell was slow during the test period of 70-250s. At 250s, the surface temperature of the metal shell was 500℃. Figure 2 As shown, it shows good heat protection effect.

[0021] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An active thermal protection device based on heat storage material, characterized in that: include: A porous hollow metal component and a heat storage component, wherein: The porous hollow metal component contains vertical ribs inside; A heat storage material filling port is reserved on one side of the porous hollow metal component.

2. The active thermal protection device based on heat storage material according to claim 1, characterized in that: The size of the porous hollow metal component is 100*100*10 mm, and the wall thickness is 1 mm.

3. The active thermal protection device based on heat storage material according to claim 1, characterized in that: The hole diameter of the porous hollow metal component ranges from 0.5 to 2 mm, and the hole spacing is 9 mm.

4. The active thermal protection device based on heat storage material according to claim 1, characterized in that: The material of the porous hollow metal component is aluminum alloy, stainless steel, titanium alloy or high-temperature alloy.

5. The active thermal protection device based on heat storage material according to claim 1, characterized in that: The heat storage component is composed of a shaped frame material and a heat storage material.

6. The active thermal protection device based on heat storage material according to claim 5, characterized in that: The shaping skeleton material is a hydrogel or water-absorbing resin material, and the heat storage material is a phase change heat storage material or a chemical heat storage material.

7. The active thermal protection device based on heat storage material according to claim 1, characterized in that: The filling port is sealed by using high temperature glue and fastening screws.

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