Influence of the wakes of rotating spokes on the performance of a turbine exhaust diffuser

被引：1
|
作者：
Kuschel, M. [1 ]
Seume, J. R. [1 ]
机构：
[1] Leibniz Univ Hannover, Inst Turbomachinery & Fluid Dynam, D-30167 Hannover, Germany
来源：
JOURNAL OF THERMAL SCIENCE | 2010年 / 19卷 / 03期
关键词：
turbine exhaust diffuser; rotating wakes; separation;
D O I：
10.1007/s11630-010-0206-2
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The design of turbine exhaust diffusers is still commonly based upon conservative design charts which do not consider the influence of the components installed upstream such as the last turbine stage. Based on investigations with different spoke wheels which approximate the blade wakes of the last turbine stage, the influence of a rotating bladed disc on the flow in a exhaust diffuser is presented. The pressure recovery for an annual diffuser with 15 half cone angle and the 5 mm spoke wheel used in the model test is very high and nearly independent on the rotational speed and the corresponding Strouhal number. For a 20 degrees annual diffuser, the pressure recovery increases with Strouhal number
引用
收藏
页码：206 / 210
页数：5
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