Heat flow calibration method for ground thermal intensity cabin test of aerospace plane

Abstract

The invention belongs to the field of heat flow sensor calibration, and relates to a heat flow calibration method for a ground heat intensity cabin test of an aerospace plane, which comprises the following steps of: measuring the temperature of a dummy test piece by placing a standard heat flow density sensor and a to-be-calibrated heat flow density sensor in the same symmetrical working environment; the heating devices are symmetrically arranged on the two sides of the false test piece, the temperature measuring sensor is arranged on the false test piece, and the temperature difference measured by the standard heat flux sensor and the heat flux sensor to be calibrated is compared at the same temperature point, so that the numerical value of the heat flux sensor to be calibrated can be corrected efficiently and accurately; the unpredictable convective heat transfer influence in the experiment can be accurately quantified through the benchmarking standard heat flow density sensor, the heating precision of the heat flow test is improved, and the examination of the ground heat intensity test on the structural member is more accurate and effective. A guiding effect is achieved on the measurement of convective heat transfer by using the total heat flux density sensor; and meanwhile, natural convection and forced convection tests can be respectively carried out.

Description

technical field [0001] The application belongs to the field of heat flow sensor calibration, and in particular relates to a heat flow calibration method used for the ground heat intensity cabin test of an aerospace aircraft. Background technique [0002] Convective heat transfer is a phenomenon in which thermal energy is transmitted from one place to another in a space by hot particles in a flowing medium. This heat transfer method only occurs in the fluid (gas and liquid), and it must be accompanied by the thermal conductivity generated by the molecular motion of the fluid itself. If, in the process of heat convection, the fluid with mass m (kg / m s) per unit area flows from the place of temperature t1 to the place of t2 per unit time, then the heat q transferred by the heat convection is shown in formula (1): [0003] q=mC p (t 2 -t 1 )………………………………(1) [0004] Among them, Cp-medium heat capacity. [0005] Convective heat transfer can be divided into gas convection and...

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Problems solved by technology

[0007] The purpose of this application is to provide a heat flow calibration method for the ground thermal strength cabin test of aerospace aircraft, to solve the problem that uncalibrated sensors will produce experimental errors when performing the ground thermal strength cabin test

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