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球面端壁造型变几何涡轮流场和性能数值研究 被引量:3

Numerical Simulation of Flow Fields and Performance of Spherical End-wall Variable Geometry Turbine
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摘要 为了研究球面端壁变几何涡轮的效率特性及损失机理,对在一单级高压涡轮基础上改造而来的球面端壁变几何涡轮进行数值模拟。结果显示,对原始涡轮的球面端壁改造和导叶端区间隙的存在都会导致涡轮效率降低,且后者的影响更加显著。涡轮导叶关闭时,导叶尾迹损失和动叶二次流损失增强,造成涡轮效率急剧下降。导叶打开时,在低压比状态下导叶尾迹损失和动叶二次流损失被削弱,使涡轮效率得到提高;高压比状态下,动叶尾迹损失增大,导致涡轮效率降低。 To investigate efficiency characteris-tics and loss mechanism of Spherical end wall VGT(variable geometry turbine),a spherical end wall VGT reformed from a one stage high pres-sure turbine was numerical simulated in this study. Both the spherical end wall profiling and,espe-cially,the vane end leakage would lead to a de-crease of turbine efficiency.With vanes closing, guide vane wake loss and secondary flow loss in-creases,and causes a rapid decrease of turbine effi-ciency.With vane open at low pressure ratio,tur-bine efficiency would increase because of lower guide vane wake loss and secondary flow loss. Blades wake loss increases with vane open at high pressure ratio,which finally causes the decrease of turbine efficiency.
出处 《机械与电子》 2014年第5期32-36,共5页 Machinery & Electronics
关键词 变几何涡轮 球面端壁 变循环发动机 涡轮效率 数值模拟 variable geometry turbine spheri-cal end wall variable cycle engine turbine efficien-cy numerical simulation
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  • 1陈绍文,陈浮,徐文远,王仲奇.变攻角下低压涡轮导向器二次流的实验研究[J].燃气涡轮试验与研究,2005,18(4):15-19. 被引量:9
  • 2刘顺隆,冯永明,刘敏,王林.船用燃气轮机动力涡轮可调导叶级的流场结构[J].热能动力工程,2005,20(2):120-124. 被引量:15
  • 3邱超,宋华芬.变几何涡轮的损失研究[J].燃气轮机技术,2007,20(1):39-42. 被引量:15
  • 4徐星仲,朱斌,蒋洪德,俞镔,谭春青,张伟.一种“后部加载”型透平静叶的设计[J].工程热物理学报,1997,18(1):48-52. 被引量:20
  • 5王仲奇 秦仁编著.透平机械原理[M].北京:机械工业出版社,1987..
  • 6QIU C,SONG H F,WANG Y H,et al.Pedormance estimation of variable geometry turbines[J].Proc IMechE,Part A:J Power and Energy,2009,223(A4):441-449.
  • 7邱超.典型燃气轮机变几何动力涡轮特性曲线的建立[D].上海:上海交通大学,2006.
  • 8SANG WOO LEE,BYOUNG JOO CHAE.Effects of squealer rim height on aerodynamic losses downstream of a high-uming turbine rotor blade[J].Experimental Thermal and Fluid Science,2008,32:1440-1447.
  • 9SAUER H,MULLER R,VOGELER K.Reduction of secondary flow losses in turbine cascades by leading edge modifications at the endwalt[J].Journal of Turbinemaehinery,2001,123:207-213.
  • 10MCCARTER A A,XIAO x W,LAKSHMINARAYANA B.Tip clearance effects in aturbine rotor.PartⅡ:velocity field and flow physics[R].ASME 2000-GT-0477,2000.

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