Details
| Original language | English |
|---|---|
| Pages (from-to) | 206-210 |
| Number of pages | 5 |
| Journal | Journal of thermal science |
| Volume | 19 |
| Issue number | 3 |
| Publication status | Published - 16 May 2010 |
Abstract
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° annual diffuser, the pressure recovery increases with Strouhal number.
Keywords
- Rotating wakes, Separation, Turbine exhaust diffuser
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of thermal science, Vol. 19, No. 3, 16.05.2010, p. 206-210.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of the wakes of rotating spokes on the performance of a turbine exhaust diffuser
AU - Kuschel, M.
AU - Seume, J. R.
N1 - Funding information: The investigations were conducted as part of the joint research programme COORETEC-turbo in the frame of AG Turbo. The work was supported by the Bundesmin-isterium für Wirtschaft und Technologie (BMWi) as per resolution of the German Federal Parliament under grant number 0327717B. The authors gratefully acknowledge AG Turbo and MAN Turbo AG for their support and permission to publish this paper. The responsibility for the content lies solely with its authors.
PY - 2010/5/16
Y1 - 2010/5/16
N2 - 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° annual diffuser, the pressure recovery increases with Strouhal number.
AB - 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° annual diffuser, the pressure recovery increases with Strouhal number.
KW - Rotating wakes
KW - Separation
KW - Turbine exhaust diffuser
UR - http://www.scopus.com/inward/record.url?scp=77956253803&partnerID=8YFLogxK
U2 - 10.1007/s11630-010-0206-2
DO - 10.1007/s11630-010-0206-2
M3 - Article
AN - SCOPUS:77956253803
VL - 19
SP - 206
EP - 210
JO - Journal of thermal science
JF - Journal of thermal science
SN - 1003-2169
IS - 3
ER -