论文部分内容阅读
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。
In order to study the influence of Hall effect on the thermal protection effect of MHD control under real gas conditions, a coupled calculation method of thermo-chemical non-equilibrium flow field, applied magnetic field and Hall electric field was established. The relationship between coupling calculation efficiency and electric field renewal interval and potential residual convergence limit is analyzed. The optimal values of the electric field renewal interval and the potential convergence limit when using the non-equilibrium Hall coefficient model are given. The results show that when the Hall coefficient is small (β = 1.0), the coupling calculation efficiency is higher when the electric field is renewed more than 100 times of the flow field, and the conclusions are consistent between the conductive wall and the insulating wall. When the Hall coefficient is large, the coupling calculation time is too long, and the iteration interval of electric field and the potential convergence limit may be appropriately increased to improve the coupling calculation efficiency.