High-precision fluid-solid coupling calculation method for thermal environment of head cone of hypersonic flight vehicle

Abstract

The invention discloses a high-precision fluid-solid coupling calculation method for a thermal environment of a head cone of a hypersonic flight vehicle. A flow field is discretized through a finite volume method, a structure temperature field is discretized through a finite element method, and coupling calculation is divided into inner iteration and outer iteration; internal iterative computationis repeatedly performed in any time step until the flow field and the structure temperature field converge or reach the maximum internal iterative step number, and the internal iteration is jumped out to enter the external iterative computation, so as to solve the next time step. According to the method, a result irrelevant to the time step length can be obtained under the large time step length,accumulated errors of a traditional fluid-solid coupling calculation method in the time advancing process can be eliminated, the problem of time lag existing in the traditional fluid-solid coupling calculation method is solved, and higher time precision is achieved. The calculation method has the advantages of being easy to understand, convenient to program and high in precision, and has universality for thermal environment coupling calculation of hypersonic flight vehicle components.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a high-precision fluid-solid coupling calculation method for the nose cone thermal environment of a hypersonic vehicle. Background technique [0002] In recent years, hypersonic vehicles and related technologies have become a research hotspot in the field of aerospace. The main feature that distinguishes a hypersonic vehicle from a conventional supersonic vehicle is that it is subjected to a huge aerodynamic heating effect, especially the nose cone of the vehicle. The high heat flux caused by aerodynamic heating will cause the temperature of the hypersonic vehicle nose cone structure to exceed 1500K. The thermal environment analysis of the nose cone is one of the difficulties and core technologies in the design of hypersonic vehicles. Accurately analyzing the thermal environment of the nose cone in the design stage directly affects the design thickness and safety of the aircr...

AI Technical Summary

Problems solved by technology

Although this method realizes the coupling calculation of aerodynamic heating and structural heat transfer, the method of freezing boundary conditions will have a time lag effect, and as the coupling calculation proceeds, the cumulative error caused by the time lag will become larger and larger

Therefore, the time accuracy of this coupling method is low, and it cannot meet the requirements of high-precision fluid-solid coupling calculation of the nose cone thermal environment. There is an urgent need for a high-precision fluid-solid coupling method to calculate the nose cone thermal environment of hypersonic vehicles.

Images