为了研究真实气体条件下霍尔效应对磁流体(MHD)控制热防护效果的影响,建立了热化学非平衡流场、外加磁场、霍尔电场的耦合计算方法.分析了耦合计算效率与电场更新间隔、电势残差收敛极限的关系.给出了采用非平衡霍尔系数模型时电场更新间隔和电势收敛极限的较优取值.研究表明,当霍尔系数较小(β=1.0)时,电场更新间隔大于100流场计算时间步时耦合计算效率较高,且导电壁面和绝缘壁面结论一致.当霍尔系数较大时,耦合计算时间过长,可适当增加电场迭代间隔和电势收敛极限以提高耦合计算效率.%Under the real flight conditions,the Hall effect usually cannot be neglected which may affect the performance of the magnetohydrodynamics(MHD) thermal protection.Therefore,the coupled numerical simulations are conducted for the thermochemical nonequilibrium flow field,the externally applied magnetic field and the induced electric field around a typical hypersonic vehicle.After that,the relations between the coupled calculation efficiency and the updating interval of the electric field as well as the converging residual limit of the electric potential are analyzed.Results show that the coupled calculation efficiency is higher under the condition that the updating interval is greater than 100 flow steps during a relatively smaller Hall parameter.However,during a larger Hall parameter,the coupling efficiency is lower but can be improved by increasing the updating interval of the electric field and potential residual limit.The suggested updating interval and potential residual limit are also given while the nonequilibrium Hall parameter model is utilized.
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