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首页> 外文会议>AIAA propulsion and energy forum;AIAA/SAE/ASEE joint propulsion conference >Comparison of computational and experimental results for a transonic variable-speed power-turbine blade operating with low inlet turbulence levels
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Comparison of computational and experimental results for a transonic variable-speed power-turbine blade operating with low inlet turbulence levels

机译：跨音速变速动力涡轮叶片在低入口湍流水平下运行的计算结果和实验结果的比较

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摘要

A computational assessment of the aerodynamic performance of the midspan section of a variable-speed power-turbine blade is described. The computation comprises a periodic single blade that represents the 2-D Midspan section VSPT blade that was tested in the NASA Glenn Research Center Transonic Turbine Blade Cascade Facility. A commercial, off-the-shelf (COTS) software package, Pointwise and CFD++, was used for the grid generation and RANS and URANS computations. The CFD code, which offers flexibility in terms of turbulence and transition modeling options, was assessed in terms of blade loading, loss, and turning against test data from the transonic tunnel. Simulations were assessed at positive and negative incidence angles that represent the turbine cruise and take-off design conditions. The results indicate that the secondary flow induced at the positive incidence cruise condition results in a highly loaded case and transitional flow on the blade is observed. The negative incidence take-off condition is unloaded and the flow is very two-dimensional. The computational results demonstrate the predictive capability of the gridding technique and COTS software for a linear transonic turbine blade cascade with large incidence angle variation.
机译：描述了对变速动力涡轮叶片中跨部分的空气动力性能的计算评估。该计算包括一个周期性的单个叶片，该叶片代表2-D中跨截面VSPT叶片，该叶片已在NASA格伦研究中心跨音速涡轮叶片级联设施中进行了测试。 Pointwise和CFD ++的商业现货（COTS）软件包用于网格生成以及RANS和URANS计算。 CFD代码提供了湍流和过渡建模选项方面的灵活性，并根据叶片负载，损失和反超音速隧道的测试数据进行了评估。以代表涡轮巡航和起飞设计条件的正和负入射角评估了仿真。结果表明，在正入射巡航条件下引起的二次流导致高负荷情况，并且在叶片上观察到过渡流。负入射起飞条件是空载的，流动是非常二维的。计算结果证明了网格技术和COTS软件对具有较大入射角变化的线性跨音速涡轮叶片级联的预测能力。

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