Effect of surface roughness on the aerodynamic performance of turbine blade cascade

Effect of surface roughness on the aerodynamic performance of turbine blade cascade

The effect of surface roughness on the boundary development and loss behavior of turbine blades is investigated with different Reynolds numbers in this paper. The result shows that the velocity profile in boundary layer is plumper on rough surface than on smooth blade. The aerodynamic loss is lowere...

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Bibliographic Details
Main Authors: Tao Bai, Jingyuan Liu, Weihao Zhang, Zhengping Zou
Format: Article
Language:English
Published: Elsevier 2014-06-01
Series:Propulsion and Power Research
Subjects:
Turbine blade
Surface roughness
Boundary layer
Reynolds number
Aerodynamic loss
Online Access:http://www.sciencedirect.com/science/article/pii/S2212540X14000194
Description
Summary:The effect of surface roughness on the boundary development and loss behavior of turbine blades is investigated with different Reynolds numbers in this paper. The result shows that the velocity profile in boundary layer is plumper on rough surface than on smooth blade. The aerodynamic loss is lowered at low Reynolds number, but becomes significantly large at high Reynolds number. The total pressure loss coefficient of cascade can reach a top increase of 129% for rougher blades comparing with smooth blades at Re=300000.
ISSN:2212-540X

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