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Direct Coupling of the NEQAIR Radiation and DPLR Computational Fluid Dynamics Codes

机译:NEQAIR辐射与DPLR计算流体力学代码的直接耦合

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The NEQAIR line-by-line radiation code is incorporated into the DPLR flow solver such that NEQAIR is now a callable subroutine of DPLR. The radiant-energy source term computed by NEQAIR acts as an energy sink, reducing the convective and radiative heating rates, and brings the shock wave closer to the body. The effects of fluid-dynamics/radiation coupling are examined by comparing coupled and uncoupled DPLR-NEQAIR results against FIRE II flight measurements and previous computations. Radiation coupling had the greatest effect at the 1643 s FIRE II trajectory point where the stagnation-point total heating rate was reduced by 15.1%. The coupled 1643 s results were closely correlated to the flight measurements. The change in stagnation-point total heating rate was 6 % at the 1636 and 1645 s trajectory points, and radiation coupling effects were essentially nonexistent at the 1651 s trajectory point. The coupled DPLR-NEQAIR surface heating-rate profiles converged after only two updates of the radiant-energy source term.
机译:NEQAIR逐行辐射代码已合并到DPLR流量求解器中,因此NEQAIR现在是DPLR的可调用子例程。 NEQAIR计算出的辐射能源项充当能量汇,降低了对流和辐射的加热速率,并使冲击波更接近人体。通过将已耦合和未耦合的DPLR-NEQAIR结果与FIRE II飞行测量结果和先前的计算进行比较,来检验流体动力学/辐射耦合的影响。辐射耦合在1643年代的FIRE II轨迹点上影响最大,停滞点总加热速率降低了15.1%。耦合的1643年代的结果与飞行测量值密切相关。停滞点总升温速率在1636和1645 s轨迹点处的变化为6%,并且在1651 s轨迹点处根本不存在辐射耦合效应。仅在两次更新辐射能源项之后,耦合的DPLR-NEQAIR表面加热速率曲线便收敛了。

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