Generation Mechanism and Transition Process of Cavitation Noise

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概要

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• The regions and mechanism of cavitation noise generation on the surface of an axial-flow pump impeller were clarified based on detailed studies, under various cavitation conditions, of pressure fluctuation levels along the impeller casing, inclusive of the outlet side away from the impeller. The region influencing cavitation noise generation the most was found to be less than approx. 1/3 of the chord extending from the leading edge of the impeller blades. A great difference existed in the pressure between the two-phase flow, comprised of vapor bubbles formed in the impeller tip zone, and the main flow, causing an increase in the levels of high-frequency pressure fluctuation components due to cavitation. This indicates that the above two-phase flow has a great influence on cavitation noise generation. This paper also discusses the process of transition from pressure fluctuation to air-borne noise.

• 一般社団法人日本機械学会の論文
• 1989-05-15

著者

• Saito Sumio

  Turbomachinery Engineering Department Haneda Plant Ebara Corporation

関連論文

• Generation Mechanism and Transition Process of Cavitation Noise

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