Improving the efficiency of the Trent 500-HP turbine using nonaxisymmetric end walls - Part I: Turbine design

被引：78

作者：

Brennan, G ^{[1
]}

Harvey, NW ^{[1
]}

Rose, MG ^{[1
]}

Fomison, N ^{[1
]}

Taylor, MD ^{[1
]}

机构：

[1] Rolls Royce PLC, Turbine Syst, Derby DE2 8BJ, England

来源：

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME | 2003年 / 125卷 / 03期

关键词：

Airfoils - Machine design - Rotors;

D O I：

10.1115/1.1450766

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper describes the redesign of the HP turbine of the Rolls-Royce Trent 500 engine making use of nonaxisymmetric end walls. The original, datum turbine used conventional axisymmetric end walls, while the vane and (shrouded) rotor aerofoil profiles were nominally the same for the two designs. Previous research on the large-scale, low-speed linear cascade at Durham University (see Hartland et al. Compositor: complete ref. in Abstract), had already demonstrated significant potential,for reducing turbine secondary losses using nonaxisymmetric end walls-by about one third. This paper shows how a methodology was derived from the results of this research and applied to the design of the single-stage Trent 500-HP turbine (model rig). In particular the application of a new linear design system for the parametric definition of these end wall shapes (described in Harvey et al. Compositor: complete ref. in Abstract) is discussed in detail.

引用

页码：497 / 504

页数：8