For increasing the thrust-to-weight ratio of modern turbojet engines, the number of stages of the turbo components or at least the number of blades per stage must be minimized. This inevitably forces a higher loading of the remaining blades, for which, especially in the compressor, even the use of modern controlled diffusion airfoil concepts is limited due to the danger of flow separation. Therefore, boundary layer control can be taken into consideration. The use of blowing proves to be most obvious for applications in turbojet engines, because the required pressurized air is, due to the working process, already available. Basic investigations on this topic are described in this paper, and both the midspan and the sidewall region are covered. As a review of the pertinent literature disclosed the lack of reliable design criteria, fundamental experiments in a cascade wind tunnel were performed. The results of these measurements are reported and recommendations concerning the application of blowing in compressor cascades are given.
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July 1992
Research Papers
Performance Improvements of Compressor Cascades by Controlling the Profile and Sidewall Boundary Layers
W. Sturm,
W. Sturm
MTU Mu¨nchen GmbH, 8000 Mu¨nchen 50, Federal Republic of Germany
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H. Scheugenpflug,
H. Scheugenpflug
MTU Mu¨nchen GmbH, 8000 Mu¨nchen 50, Federal Republic of Germany
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L. Fottner
L. Fottner
Universita¨t der Bundeswehr Mu¨nchen, 8014 Neubiberg, Federal Republic of Germany
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W. Sturm
MTU Mu¨nchen GmbH, 8000 Mu¨nchen 50, Federal Republic of Germany
H. Scheugenpflug
MTU Mu¨nchen GmbH, 8000 Mu¨nchen 50, Federal Republic of Germany
L. Fottner
Universita¨t der Bundeswehr Mu¨nchen, 8014 Neubiberg, Federal Republic of Germany
J. Turbomach. Jul 1992, 114(3): 477-486 (10 pages)
Published Online: July 1, 1992
Article history
Received:
March 4, 1991
Online:
June 9, 2008
Connected Content
A companion article has been published:
Transient Dynamic Analysis of Rotors Using SMAC Techniques: Part 2, Numerical Study
Citation
Sturm, W., Scheugenpflug, H., and Fottner, L. (July 1, 1992). "Performance Improvements of Compressor Cascades by Controlling the Profile and Sidewall Boundary Layers." ASME. J. Turbomach. July 1992; 114(3): 477–486. https://doi.org/10.1115/1.2929168
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