Boundary Layers on Rough Compressor Blades
K. Bammert,R. Milsch +1 more
TLDR
In this paper, the effect of axial flow compressors roughened by corrosion or erosion on the boundary layers of the blades has been investigated with an enlarged cascade and the results enabled to develop new formulas for a modified friction coefficient and for the laminar-turbulent transition and separation points of the boundary layer.Abstract:
Blades of axial flow compressors are often roughened by corrosion or erosion. There is only scant information about the influence of this roughening on the boundary layers of the blades and thereby on the compressor efficiency. To obtain detailed information for calculating the efficiency drop due to the roughness, experimental investigations with an enlarged cascade have been executed. The results enabled to develop new formulas for a modified friction coefficient in the laminar region and for the laminar-turbulent transition and the separation points of the boundary layer. Thus, together with the Truckenbrodt theory, it was possible, to get a good reproduction of the experimental results.Copyright © 1972 by ASMEread more
Citations
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Journal ArticleDOI
A Review of Surface Roughness Effects in Gas Turbines
TL;DR: In this article, the effects of surface roughness on gas turbine performance are reviewed based on publications in the open literature over the past 60 years, and the conclusion remains that considerable research is yet necessary to fully understand the role of roughness in gas turbines.
Journal ArticleDOI
Effects of surface roughness on deviation angle and performance losses in wet steam turbines
TL;DR: In this article, the effects of turbine blade roughness and steam condensation on deviation angle and performance losses of the wet stages are investigated, in which abrupt formation of liquid droplets produces condensation shocks.
Dissertation
Axial Compressor Performance Deterioration and Recovery through Online Washing
TL;DR: In this article, the authors show that turbine performance deterioration can negatively affect overall production capacity of power plants and cause major economic losses, due to fouling in the compressor sect of a gas turbine.
Journal ArticleDOI
Surface roughness of real operationally used compressor blade and blisk
TL;DR: In this paper, roughness in high-pressure compressor reduces the pressure rise and thus improves the efficiency of aircraft engine maintenance, among other effects, roughness of axial compressors reduces the power consumption.
The measurement of boundary layers on a compressor blade in cascade. II - Suction surface boundary layers
Steven Deutsch,W. C. Zierke +1 more
TL;DR: In this paper, a one-component laser Doppler velocimeter (LDV) has been used to measure the two-dimensional, periodic flow field about a double circular arc, compressor blade in cascade.