Publication Date:
2016-06-07
Description:
The existence of clusters of pure tones at integral multiples of shaft speed has been noted for supersonic-tip-speed operation of fans and compressors. A continuing program to explore this phenomenon, often called combination-tone noise, has been in effect for several years. This paper reviews the research program, which involves a wide range of engines, compressor rigs, and special apparatus. Elements of the aerodynamics of the blade-associated shock waves are outlined and causes of blade-to-blade shock inequalities, responsible for the multiple tones, are described.
Keywords:
FLUID MECHANICS AND HEAT TRANSFER
Type:
Pennsylvania State Univ. Fluid Mech., Acoustics, and Design of Turbomachinery, Pt. 2; p 435-459
Format:
application/pdf
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