为了削弱静叶叶根气封间隙流对压气机性能的不利影响,在分析该间隙流特点的基础上提出了相应的优化方法,即增加上游气封口处的几何削角来控制泄漏流与主流的相互作用,削弱其对主流流动的干扰.结合优化前后计算结果的比较得出,优化后气封泄漏流与主流流动的掺混位置更接近气封槽内迁移,泄漏流引起的阻塞减少,损失减小,静叶排的性能提高.多个不同削角的计算比较表明存在一最佳削角约为25°,此时三排叶片的效率提高0.47%.
参考文献
| [1] | Lejambre CR;Zacharias RM .Development and Application of a Multistage Navier-Stokes Solver.Part Ⅱ:Application to a High Pressure Compressor Design,[ASME 95-GT-343][R].,1995. |
| [2] | Wellborn S R;Okiishi T H .The Influence of Shrouded Stator Cavity Flows on Multistage Compressor Performance[J].Journal of Turbomachinery,Transactions of the ASME,1999,122:486-497. |
| [3] | S. R. Wellborn;I. Tolchinsky;T. H. Okiishi .Modeling Shrouded Stator Cavity Flows in Axial-Flow Compressors[J].Journal of turbomachinery,2000(1):55-61. |
| [4] | Heidegger N J;Hall EJ .Paxameterized Study of HighSpeed Compressor Seal Cavity Flow [AIAA Paper 96-2807][R].,1996. |
| [5] | Storer JA;Cumpsty N A .An Approximate Analysis and Prediction Method for Tip Clearance Loss in Axial Compressors [ASME 93-GT-140][R].,1993. |
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