Effect of free-stream turbulence on heat transfer and fluid flow in a transonic turbine stage
(2006) 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006- Abstract
- In the present work, a numerical study has been performed to simulate the effect of free-stream turbulence, length scale and variations in rotational speed of the rotor on heat transfer and fluid flow for a transonic high-pressure turbine stage with tip clearance. The stator and rotor rows interact via a mixing plane, which allows the stage to be computed in a steady manner. The focus is on turbine aerodynamics and heat transfer behavior at the mid-span location, and at the rotor tip and casing region. The results of the fully 3D CFD simulations are compared with experimental results available for the so-called MT1 turbine stage. The predicted heat transfer and static pressure distributions show reasonable agreement with the experimental... (More)
- In the present work, a numerical study has been performed to simulate the effect of free-stream turbulence, length scale and variations in rotational speed of the rotor on heat transfer and fluid flow for a transonic high-pressure turbine stage with tip clearance. The stator and rotor rows interact via a mixing plane, which allows the stage to be computed in a steady manner. The focus is on turbine aerodynamics and heat transfer behavior at the mid-span location, and at the rotor tip and casing region. The results of the fully 3D CFD simulations are compared with experimental results available for the so-called MT1 turbine stage. The predicted heat transfer and static pressure distributions show reasonable agreement with the experimental data. In general, the local Nusselt number increases, at the same turbulence length scale, as the turbulence intensity increases, and the location of the suction side boundary layer transition moves upstream towards the blade leading edge. Comparison of the different length scales at the same turbulence intensity shows that the stagnation heat transfer was significantly increased as the length scale increased. However, the length scale evidenced no significant effects on blade tip or rotor casing heat transfer. Also, the results presented in this paper show that the rotational speed in addition to the turbulence intensity and length scale has an important contribution to the turbine blade aerodynamics and heat transfer. Copyright (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/616875
- author
- Mumic, Fadil LU and Sundén, Bengt LU
- organization
- publishing date
- 2006
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Boundary layer transition, Free stream turbulence, Rotational speed
- host publication
- American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
- pages
- 9 pages
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
- conference location
- Chicago, IL, United States
- conference dates
- 2006-11-05 - 2006-11-10
- external identifiers
-
- scopus:84920631497
- ISSN
- 0272-5673
- ISBN
- 0791837904
- language
- English
- LU publication?
- yes
- id
- c1cc7c78-b788-4292-9e93-7233aa846fd2 (old id 616875)
- date added to LUP
- 2016-04-01 16:06:06
- date last changed
- 2022-01-28 17:17:18
@inproceedings{c1cc7c78-b788-4292-9e93-7233aa846fd2,
abstract = {{In the present work, a numerical study has been performed to simulate the effect of free-stream turbulence, length scale and variations in rotational speed of the rotor on heat transfer and fluid flow for a transonic high-pressure turbine stage with tip clearance. The stator and rotor rows interact via a mixing plane, which allows the stage to be computed in a steady manner. The focus is on turbine aerodynamics and heat transfer behavior at the mid-span location, and at the rotor tip and casing region. The results of the fully 3D CFD simulations are compared with experimental results available for the so-called MT1 turbine stage. The predicted heat transfer and static pressure distributions show reasonable agreement with the experimental data. In general, the local Nusselt number increases, at the same turbulence length scale, as the turbulence intensity increases, and the location of the suction side boundary layer transition moves upstream towards the blade leading edge. Comparison of the different length scales at the same turbulence intensity shows that the stagnation heat transfer was significantly increased as the length scale increased. However, the length scale evidenced no significant effects on blade tip or rotor casing heat transfer. Also, the results presented in this paper show that the rotational speed in addition to the turbulence intensity and length scale has an important contribution to the turbine blade aerodynamics and heat transfer. Copyright}},
author = {{Mumic, Fadil and Sundén, Bengt}},
booktitle = {{American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD}},
isbn = {{0791837904}},
issn = {{0272-5673}},
keywords = {{Boundary layer transition; Free stream turbulence; Rotational speed}},
language = {{eng}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{Effect of free-stream turbulence on heat transfer and fluid flow in a transonic turbine stage}},
year = {{2006}},
}