高负荷反向旋转压缩机内部流场涡度动力学诊断

T. Yan, H. Chen, P. Yan
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引用次数: 0

摘要

基于气动优化技术与计算流体力学相结合的方法,对高负荷对转压气机进行了优化设计,并采用涡度动力学诊断方法对通道内的流动结构进行了分析和评价。结果表明,优化后的压气机在设计点和非设计点的气动性能都有明显改善。通过对比优化前后叶片表面涡度动力学参数的分布特征,发现边界涡量通量和周向涡量能够有效捕获通道内激波和二次流等高流动损失区域。此外,提出了基于边界熵通量理论的边界熵通量诊断方法,拓展了边界涡动力学诊断方法的应用领域。涡度动力学参数的变化揭示了叶片几何参数对通道粘性流场的影响,为气动优化设计提供了理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Vorticity dynamics diagnosis of the internal flow field in a high-load counter-rotating compressor
A high-load counter-rotating compressor is optimised based on the method of coupling aerodynamic optimisation technology and computational fluid dynamics, and the flow structures in the passage are analysed and evaluated by vorticity dynamics diagnosis. The results show that the aerodynamic performance of optimised compressor are obviously improved at both design point and off-design point. By comparing the distribution characteristics of vorticity dynamics parameters on the blade surface before and after the optimisation, it is found that BVF (boundary vorticity flux) and circumferential vorticity can effectively capture high flow loss regions such as shock waves and secondary flow in the passage. In addition, the BEF (Boundary enstrophy flux) diagnosis method based on the theory of boundary enstrophy flux is developed, which expands the application scenario of the boundary vorticity dynamics diagnosis method. The change of vorticity dynamics parameters shows blade geometric parameters’ influence on the passage’s viscous flow field, which provides a theoretical basis for the aerodynamic optimisation design.
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