非嵌入式概率配置点法在后台阶地形流场计算中的应用

Application of Non-intrusive Probabilistic Collocation Method in Back-step Flow Calculation

为验证非嵌入式概率配置点法的准确性,针对来流速度的不确定性,对后台阶流动进行不确定CFD模拟,分析该方法在后台阶地形流场计算中的应用,并比较计算结果与试验结果,验证了该方法的可靠性与实用性。结果表明,该方法可在较小计算量下得到较高的精度,提高了计算的可信度和参考价值。研究结果为该方法在复杂边界流场中的应用提供依据。

In order to verify the accuracy of non-instructive probabilistic collocation method,the uncertain CFD simulation of the back-step flow is carried out considering the flow velocity uncertainty.And the use of this method in backstep flow is analyzed.At the same time,the calculation results are compared with the experimental results to verify the reliability and practicability of the method.The results show that the method can obtain higher accuracy,and improve the reliability and reference value of the calculation results with a rather small calculation amount.The results provide a basis for application of this method in complex boundary flow.