A hybrid lattice Boltzmann flux solver for integrated hypersonic fluid-thermal-structural analysis
| Autor: | Jiangfeng Wang, Jiawei Li, Liming Yang, Chang Shu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Hypersonic speed Discretization Lattice Boltzmann methods Aerospace Engineering 02 engineering and technology Hypersonic 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics 020901 industrial engineering & automation Inviscid flow 0103 physical sciences Fluid-structural-thermal Motor vehicles. Aeronautics. Astronautics Physics Finite volume method Mechanical Engineering Hybrid lattice Boltzmann flux solver TL1-4050 Mechanics Solver Boltzmann equation Improved switch function Heat transfer |
| Zdroj: | Chinese Journal of Aeronautics, Vol 33, Iss 9, Pp 2295-2312 (2020) |
| ISSN: | 1000-9361 |
| DOI: | 10.1016/j.cja.2020.04.020 |
| Popis: | In this paper, a hybrid Lattice Boltzmann Flux Solver (LBFS) with an improved switch function is proposed for simulation of integrated hypersonic fluid-thermal-structural problems. In the solver, the macroscopic Navier–Stokes equations and structural heat transfer equation are discretized by the finite volume method, and the numerical fluxes at the cell interface are reconstructed by the local solution of the Boltzmann equation. To compute the numerical fluxes, two equilibrium distribution functions are introduced. One is the D1Q4 discrete velocity model for calculating the inviscid flux across the cell interface of Navier–Stokes equations, and the other is the D2Q4 model for evaluating the flux of structural energy equation. In this work, a new dual thermal resistance model is proposed to calculate the thermal properties at the fluid–solid interface. The accuracy and stability of the present hybrid solver are validated by simulating several numerical examples, including the fluid-thermal-structural problem of cylindrical leading edge. Numerical results show that the present solver can accurately predict the thermal properties of hypersonic fluid-thermal-structural problems and has the great potential for solving fluid-thermal-structural problems of long-endurance high-speed vehicles. |
| Databáze: | OpenAIRE |
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