压气机静叶气封几何优化与流动分析.pdfVIP

第 30 卷第 8 期 工程热物理学报 Vo 1.30 , No.8 JOURNAL OF ENGINEERING THER乱在OPHYSICS 2009 年 8 月 Aug. , 2009 压气机静叶气封几何优化与流动分析 马文主禄整颜春伟 {清华大学热能工程系热科学与动力工程教育部重点实验室，北京 100084) 摘 要 为了削弱静~tl!t根气封间隙流对压气机性能的不1电影响，在分析该间隙流辛辛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Ilt排的性 0 能提高.多个不同削角的计算比较表明存在一最佳酿i 角约为 25 ，此时三排叶片的效率提高。.47%. 关键词压气机;气封i湾隙流;几何优化;数筐模拟 中图分类号 TK123 文献标识码 A 文章编号 0253-231X(2009)08-1288-03 CO孔1PRESSOR STATOR SEAL CAVITY GEO孔1ETRY OPTI坠1JZATION AND FLOW ANALYSIS MA Wen-Sheng LU Kun GU Chun札Tei (Key La.boratory for Tberma1 Science and Power Engineering of Ministry of Ed出ation， Department of Tbermal Engineering, Tsingbua University, Beiji培 100084， Cbina) Abstract In order to weaken the hu此 of seal cavity fl.ow to compressor performance , cavity geo囚的roy is optimizied through shearing the hub corner to control the interaction betwεen leakage fl.ow and mainfl.ow. Numerical simulation results present that opti组ization case shows a improvement including a lower mixing loc时ion， thinner boundary layer , reducing blockage and loss , a smaller separation and enhanced stator operation. The comparasion of several cases with different shear angle shows the angle 25 degree ìs an optimized she缸缸19le， and its e组ciency of the case is 0 .47% higher than the case before optimization. Key words 缸ial compressor; seal leakage fl.ow; geometry optimization; numerical simulation 。引 的流动机理，也还实了该优住方法能够有效地削弱 现代高佳能压气机的设计朝着高负荷饪襄弦比