AERODYNAMIC LOSSES FROM TURBINE COMPONENTS WITHIN GAS TURBINE ENGINES

摘要：

　　A survey of recent research on aerodynamic loss investigations for turbine components of gas turbine engines is presented.Experimental and numerically predicted results are presented from investigations undertaken over the past 60 plus years.Of interest are losses from the development of secondary flows from airfoil/endwall interactions,and from cambered airfoils.The most important of the airfoil/endwall secondary flows are passage vortices,counter vortices,and corner vortices.The structure and development of these secondary flows are described as they affect aerodynamic performance within and downstream of turbine passage flows in compressible,high speed flows with either subsonic or transonic Mach number distributions,as well as within low-speed,incompressible flows.In regard to profile losses,considered are cambered airfoils with no film cooling.Here,experimentally measured and numerically predicted variations of streamwise development,freestream turbulence intensity,and exit Mach number are addressed as they influence integrated total pressure losses,area-averaged loss coefficients,mass-averaged total pressure loss coefficients,and Integrated Aerodynamic Loss.

关键词： Aerodynamic losses gas turbine engines turbine components airfoil/endwall interactions secondary flows vorticity.

作者: Phil Ligrani Geoffrey Potts Arshia Fatemi

作者单位: Oliver L. Parks Endowed Chair,Professor of Aerospace and Mechanical Engineering;ParksCollege of Engi Parks College of Engineering,Aviation,and Technology,Saint Louis University,3450 Lindell Boulevard,M

会议类型: 国际会议

会议名称: The 5th International Symposium on Jet Propulsion and Power Engineering(第五届喷气推进与动力工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-13

在线出版日期: 2014-09-15（万方平台首次上网日期，不代表论文的发表时间）