中等雷诺数下有无上游扰动的低压涡轮叶栅非定常流场高保真数值模拟

IF 2.9 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Zhu, Hongbo, Pang, Xiyuan, Wu, Feng, Zhang, Chunxiao, Bao, Yan, Xu, Hui
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引用次数: 0

摘要

本文采用基于高阶非结构化方法的高性能计算方法,数值研究了中等雷诺数下不同进流条件下T106A低压涡轮的气动性能。考虑均匀入流和扰动入流两种不同的条件,扰动入流在叶栅上游放置一个小圆柱,产生尾流湍流作为长期扰动。采用高阶傅立叶谱/hp元方法求解高复杂几何叶栅中的流动动力学问题。从叶栅壁面压力和摩擦系数的分布、尾迹压力损失的分布以及边界层流动结构的演化特征等方面对流动过渡特性进行了量化。数值结果表明,目前的数值模拟能够准确地预测低压涡轮叶栅的流动过渡性能,并捕捉到尾迹扰动对叶栅的影响,与均匀入流情况相比,尾迹扰动能有效地改变低压涡轮叶栅的流动过渡性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High fidelity numerical simulations on the unsteady flow field of low-pressure turbine cascades with and without upstream disturbance at moderate Reynolds number
This paper numerically investigates the aerodynamic performance of the T106A low-pressure turbine based with different inflow conditions at moderate Reynolds number by using high performance computing based on high order unstructured methods. Two different inflow conditions respectively of uniform and disturbed are considered, while for the latter a small circular cylinder is placed upstream of the cascade to generate wake turbulence as a long-standing disturbance. A high order Fourier-spectral/hp element method is employed to solve the flow dynamics in the cascade of high complex geometries. Flow transition characteristics are quantified in terms of the distribution of cascade wall surface pressure and friction coefficient, the distribution of wake profile pressure loss and the evolution characteristics of boundary layer flow structures as well. The numerical results show that the current numerical simulations accurately predict the flow transition performance of low-pressure turbine cascades and capture the effects of wake-generated disturbance on the cascade, which is shown to effectively modify the flow transition performance as compared with the uniform inflow case.
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来源期刊
CiteScore
4.50
自引率
4.30%
发文量
35
审稿时长
11 weeks
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