Steady test system and method for heat conduction coefficient and interface thermal resistance of radiation heat-dissipation correction-type aviation background material

Abstract

The invention discloses a steady test system and method for heat conduction coefficient and interface thermal resistance of a radiation heat-dissipation correction-type aviation background material. The device comprises a germanium solar absorption panel hot source, a radiation refrigerating plate cold source, a temperature test system and a data acquisition system, wherein the hot source and thecold source both are connected with a segment of cylindrical aviation aluminum-alloy material, a high-accuracy temperature sensor is arranged at an upper side of the aluminum-alloy material and is used for testing a temperature, the cold source, the hot source and a heat conductor connected with the cold source and the hot source can be maintained coaxially on a mechanical structure, a cold side is fixed, a hot side can axially move, radiation-prevention layers are arranged at outer sides of an aluminum-alloy heat conductor and a sample placement part, radiation-prevention layers are additionally arranged outside a temperature data acquisition device, the temperature sensor and a connection wire, and power is supplied to the acquisition device by a solar cell. The hot source and the radiation refrigerating panel cold source can stably work for a long time in a space environment, the system can be enabled to be adaptive to the space environment with the application of the aviation aluminum-alloy material, and the radiation heat dissipation of the test system in the space environment is isolated by the radiation-prevention layers.

Description

technical field [0001] The invention relates to the field of steady-state testing of thermal physical properties of materials in a space environment, in particular to a steady-state testing system and method capable of satisfying thermal conductivity and interface thermal resistance of materials in a space environment. Background technique [0002] With the rapid development of aerospace technology, human activities in outer space will increase day by day. Human activities in outer space are inseparable from necessary aerospace equipment and systems composed of various equipment. These devices and systems are located in the high vacuum and microgravity environment in space. In order to ensure their normal operation, thermal control and thermal management are required for them. There are various solid materials in contact between the cold and heat sources of these devices, and the thermal resistance network is composed of the bulk thermal resistance of each material and the ...

AI Technical Summary

Problems solved by technology

However, the thermal performance of aerospace materials is mostly tested and calculated in a ground simulation environment, and it is difficult to test the thermal conductivity and interface thermal resistance of materials in a space environment.

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