High-precision hybrid calculation method, device and equipment for shock wave instability and storage medium

Abstract

The invention relates to a high-precision hybrid calculation method and device and equipment for shock wave instability, and a storage medium. The method comprises the following steps: initializing flow field unit information, and setting a reconstruction mode and a data format at the current moment as a preset mode; reconstructing the flow field unit information according to the flow field information and the reconstruction mode at the current moment; according to a reconstruction result, calculating a flow field interface flux by adopting a data format at the current moment; obtaining a stability matrix according to the flux of the grid interface; analyzing the feature vector of the stability matrix through a matrix stability analysis method, and further obtaining the position where shock wave instability occurs; using a high-robustness numerical format for calculation at an unstable position, and using a low-dissipation numerical format for calculation at other positions. The shock wave is stably captured by applying targeted treatment to the shock wave instability position. According to the method, shock waves can be stably captured, and then accurate distribution of the surface heat flow of the hypersonic aircraft is obtained.

Description

technical field [0001] The present application relates to the technical field of computational fluid dynamics, in particular to a high-precision hybrid calculation method, device, equipment and storage medium for shock wave instability. Background technique [0002] At present, the problem of aerodynamic heat has become an important factor restricting the development of hypersonic vehicles. Using numerical simulation method to numerically predict the aerodynamic thermal problems of hypersonic vehicles, and then carry out targeted heat protection treatment, this is a common method for thermal protection of hypersonic vehicles. [0003] Since the hypersonic vehicle will produce a strong shock wave discontinuity when flying in the air, the compression of the shock wave is the main cause of the aerodynamic and thermal problems of the hypersonic vehicle. Therefore, in order to achieve accurate aerothermal simulation of hypersonic vehicles, it is necessary to be able to simulate ...

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Problems solved by technology

The use of the mixed function method is based on the accurate resolution of shock waves, and the existence of free parameters in the mixed function further limits its application in practical calculations

The key to the hybrid calculation method based on regional decomposition is the selection of the decomposition position. At present, there are two ideas based on the selection of the shock wave position and the boundary layer position, but these two ideas are based on the accurate identification of the shock wave or the boundary layer. Due to the imperfection of current shock wave detection and boundary layer detection technology, this method also has great limitations

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