A Ground Prediction Method of Coupling Effects of Aerothermal and Material Catalytic Properties

Abstract

The invention discloses a ground prediction method for aerodynamic heat and material catalytic characteristic coupling effect. The ground prediction method includes analyzing material surface heat flow of different materials under a surface catalytic characteristic condition according to a theoretical method; establishing a function relation that the material surface catalytic effect changes along with material surface catalytic compound coefficients; subjecting typical part heat environments to engineering evaluation based on flight states and aerodynamic configurations, and combining the typical part heat environment engineering calculation results with the function relation so as to predict an air vehicle surface heat flow response course in a flight state; adopting a heat transfer theory method so as to predict an air vehicle internal temperature response course in the flight state. The ground prediction method has the advantages that accurate description on the aerodynamic heat and material catalytic characteristic coupling effect is achieved, and powerful support for exquisite design of heatproof and heat-insulating systems is provided.

Description

technical field [0001] The invention belongs to the technical field of aircraft testing, in particular to a ground prediction method for coupling effects of aerodynamic heat and material catalytic properties. Background technique [0002] When the aircraft flies at high speed, it will form a strong bow shock wave around the head. Due to the viscous dissipation effect and the strong compression of the shock wave, part of the huge kinetic energy loss is converted into the internal energy of the gas in the shock layer. When the incoming air passes through the shock wave, it is heated to thousands of degrees or even tens of thousands of degrees to form a high-temperature gas layer. The degrees of freedom of translation, rotation and vibration of gas molecules are excited, dissociated or even ionized by energy. The impact of vibrational energy excitation, molecular dissociation, atomic recombination, chemical reaction between components, and ionization on the flow field paramete...

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Problems solved by technology

[0003] Due to the lack of in-depth analysis and relevant data, the traditional design cannot accurately describe the coupling effect of aerodynamic heat and material catalytic properties, resulting in a conservative design of the thermal protection system, which brings great difficulties to the optimal design of the thermal protection system

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