The Influence of Blade Number Ratio and Blade Row Spacing on Axial-Flow Compressor Stator Blade Dynamic Load and Stage Sound Pressure Level

[+] Author and Article Information
H. E. Gallus, H. Grollius, J. Lambertz

Institute for Jet Propulsion and Turbomachines, Technical University Aachen, West Germany

J. Eng. Power 104(3), 633-641 (Jul 01, 1982) (9 pages) doi:10.1115/1.3227326 History: Received December 10, 1980; Online September 28, 2009


In axial-flow turbomachines considerable dynamic blade loads and noise production occur as a result of the unsteady blade row interaction between rotor and stator blades. This paper presents results of midspan measurements of the dynamic pressure distribution on the stator blade surface (fixed number of blades) for various rotor-blade numbers and various axial clearances between rotor and stator. For this purpose, one stator blade had been provided with eleven semiconductor pressure transducers in the midspan section. Simultaneously, the sound pressure level was measured at two axial distances downstream of the stator by four condensator microphones distributed along the circumference in each of the two sections and mounted flush with the wall surface. The wake-flow distribution downstream of the rotor could be obtained by a rotating three-hole pressure probe. The results of the corresponding dynamic pressure-measurements and noise measurements are discussed and compared with results from theory.

Copyright © 1982 by ASME
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