Improving the Efficiency of the Trent 500 HP Turbine Using Non-Axisymmetric End Walls: Part II

DOI：

10.1115/2001-gt-0505

发表时间：

2001-06

期刊：

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

Martin George Rose;N. Harvey;P. Seaman;D. Newman;D. McManus

本白皮书的第一部分描述了罗尔斯-罗伊斯Trent 500的高压涡轮模型试验台如何通过在叶片和叶片通道上应用非轴对称端壁来重新设计，同时保持涡轮的工作点和整体流动条件不变。本文介绍了模型试验台的试验结果，并将其与基准设计(常规轴对称端墙)的结果进行了比较。涡轮机效率的测量改进显示与达勒姆大学先前的线性叶栅研究预期的一致，见Harvey等人。[1]和Hartland et al.[2]。在设计和非设计条件下都可以观察到这些改进。在转子出口处拍摄的热线横截面显示，出乎意料的是，端壁轮廓在整个涡轮流场中引起了变化。参考初步的三维CFD分析，对这一结果进行了讨论。结果表明，本文第一部分所述的设计方法已经得到验证，非轴对称端壁仿形现在是降低透平(可能是所有轴流透平机械)二次损失的主要新工具。然而，还需要进一步的工作来充分了解端壁仿形的阶段性(和多阶段性)影响。版权所有：ASME，2001

Part I of this paper described how the HP turbine model rig of the Rolls-Royce Trent 500 was redesigned by applying non-axisymmetric end walls to both the vane and blade passages, whilst leaving the turbine operating point and overall flow conditions unaltered. This paper describes the results obtained from testing of the model rig and compares them with those obtained for the datum design (with conventional axisymmetric end walls). Measured improvements in the turbine efficiency are shown to be in line with those expected from the previous linear cascade research at Durham University, see Harvey et al. [1] and Hartland et al. [2]. These improvements are observed at both design and off-design conditions. Hot wire traverses taken at the exit of the rotor show, unexpectedly, that the end wall profiling has caused changes across the whole of the turbine flow field. This result is discussed making reference to a preliminary 3-D CFD analysis. It is concluded that the design methodology described in part I of this paper has been validated, and that non-axisymmetric end wall profiling is now a major new tool for the reduction of secondary loss in turbines (and potentially all axial flow turbomachinery). Further work, though, is needed to fully understand the stage (and multistage) effects of end wall profiling.Copyright © 2001 by ASME

Improving the Efficiency of the Trent 500 HP Turbine Using Non-Axisymmetric End Walls: Part II — Experimental Validation

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