An adiabatic heat flow meter

Abstract

The invention discloses an adiabatic heat flowmeter, which comprises a sensitive sheet, a thermocouple, a first heat insulation component, a protective film, a second heat insulation component, a compensation sheet and a bottom sheet. The sensitive sheet is located on the uppermost layer to receive the radiant heat flow from the outside. Below the sensitive sheet is the first heat insulation component to prevent heat transfer. The compensation sheet is located under the first heat insulation component to compensate for the gap between the surface of the spacecraft and the sensitive sheet. The size of the compensation sheet is larger than that of the sensitive sheet. The compensation sheet is under the second thermal insulation component to prevent heat transfer. The bottom sheet is located under the second thermal insulation component. On the side of the first thermal insulation component and the second The side of the thermal insulation component is pasted with a protective film, which is used to reduce the heat exchange between the gaps between the layers of the multi-layer thermal insulation material and the outside world. The adiabatic heat flow meter is suitable for measuring the incident radiation heat flux density of the sun and the earth's thermal radiation simulator on the surface of the spacecraft, and has a simple structure and high measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of measurement and relates to a measuring device for infrared radiation heat flux under vacuum conditions. The device can be used to measure the infrared radiation heat flux reaching the surface of a spacecraft or the infrared radiation heat flux absorbed by the surface in a spacecraft heat balance test. Background technique [0002] In general industry, because the effect of heat radiation is smaller than fluid convection heat transfer or solid heat conduction, it is often ignored. The same is true for heat flow measurement, often ignoring radiation heat flow, only measuring the heat flow of fluid convective heat transfer or heat conduction, or mainly measuring the heat flow of fluid convective heat transfer or heat conduction. The space where the spacecraft operates is in a vacuum state. The sun and the earth heat the spacecraft through thermal radiation, and the radiation heat flux reaching the surface of...

AI Technical Summary

Problems solved by technology

However, it is found in actual use that due to the strong heat conduction effect of the hard foam plastic ring 106 and the copper cup 101, the heat flow receiving copper sheet 102 is greatly affected by heat conduction and heat leakage, and the measurement accuracy of radiant heat flow is not high.

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