Method for determining temperature field distribution of cabin of carrier rocket in flight phase in atmospheric layer

Abstract

The invention relates to a method for determining temperature field distribution of a cabin of a carrier rocket in a flight phase in an atmospheric layer. The method comprises a first step of determining an aerodynamic heating thermal flow qh changing along with the flight height and acting on the outer wall of the cabin; a second step of determining an average natural convection heat transfer coefficient alpha n of the shell surface of an instrument in a closed cavity of the cabin changing along with the flight height; a third step of determining a forced convection heat transfer coefficient alpha f of interior of the cabin caused by flight accelerated speed and constant leakage of gas in the cabin; and a fourth step of building a cabin node thermal network model, finishing thermal coupling analysis, and obtaining the cabin temperature field distribution. The method comprehensively considers the impact of aerodynamic heating outside the cabin, air natural convection in the cabin and forced convection on the cabin thermal environment, thereby effectively solving the problem of determination of temperature field distribution of the cabin of the carrier rocket in the flight phase in the atmospheric layer.

Description

technical field [0001] The invention relates to a method for determining the temperature field distribution of a cabin section of a flight section in the atmosphere of a carrier rocket, which belongs to the analysis and design of the thermal environment of the carrier rocket. Background technique [0002] During the flight of the launch vehicle in the atmosphere (flight altitude 0km≤h≤71km), the main factors affecting the thermal environment of the cabin include: aerodynamic heating of the outer wall of the cabin, self-heating of the instruments and equipment in the cabin, heat conduction of the propellant in the tank, and internal heating of the cabin. Natural convection heat transfer caused by the presence of air, forced convection heat transfer inside the cabin due to flight acceleration and continuous leakage of gas in the cabin. Among them, aerodynamic heating, natural convection heat transfer and forced convection heat transfer of gas in the cabin account for the large...

AI Technical Summary

Problems solved by technology

Among them, aerodynamic heating, natural convective heat transfer and forced convective heat transfer of gas in the cabin account for the largest proportion of the factors affecting the thermal environment of the cabin, and are the main factors affecting the temperature environment distribution of the cabin, and their determination methods are also relatively complicated

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