论文标题

LES/DNS使用高阶LB模型超过T106 LPT级联

LES/DNS of flow past T106 LPT cascade using a higher-order LB model

论文作者

Maruthi, Naliganahalli Hanumantharayappa, Thantanapally, Chakradhar, Namburi, Manjusha, Kumaran, Viswanathan, Ansumali, Santosh

论文摘要

本工作的主要目的是评估用于分离和过渡流的高阶熵晶格鲍尔茨曼方法(ELBM),而无需使用任何明确的湍流模型。为此,我们选择模拟两种T106低压涡轮(LPT)级联反应-T106A和T106C - 分别代表不可压缩和可压缩的流程度。这些结果是使用我们公司内部高阶ELBM跨性别求解器获得的。我们已经对两个测试用例进行了两组模拟。一个带有干净的入口,另一个带有由白色高斯噪声叠加在入口速度上的入口干扰。对于干净的入口案例,在两个测试用例中,流在整个刀片表面上保持层流。对于入口干扰情况,它在吸气侧进行过渡。 T106A的T106A的压力系数和T106C的叶片表面的等肌Mach数与实验结果非常匹配。同样,根据Q标准的流量特征的定性比较与文献中报道的早期计算结果非常吻合。

The main objective of the present work is to assess higher-order Entropic Lattice Boltzmann Method (ELBM) for separated and transitional flows without the use of any explicit turbulence model. For this, we chose to simulate two cases of T106 Low-Pressure Turbine (LPT) cascade -- T106A and T106C -- representing incompressible and compressible flow regimes respectively. These results are obtained using our company's in-house higher-order ELBM transonic solver. We have carried out two sets of simulations for both the test cases. One with a clean inlet and the other with an inlet disturbance given by white Gaussian noise superimposed on the inlet velocity. For the clean inlet case, the flow remains laminar on the entire blade surface for both the test cases. It undergoes transition on the suction side for the inlet disturbance case. The pressure coefficient for the T106A and the isentropic Mach number on the blade surface for the T106C matches well with the experimental results. Also, the qualitative comparison of flow features in terms of the Q-criterion is in good agreement with the earlier computational results reported in literature.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源