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Differentiation of impinging jet noise
Abhijit Dhamanekar,
Published in The Institute of Noise Control Engineering of the USA, Inc.
2015
Abstract
High-speed subsonic and supersonic impinging jets are seen in various applications such as cooling of equipment from heavy and large turbine blades, fusion blankets to weightless and micro size electronic chips. Impinging jets are widely used for heating and cooling operations. High rate of exchange of heat, mass and momentum makes these flows very fruitful in many applications. But these flows also contain other features responsible for noise generation, such as high rate of turbulent mixing, boundary layer turbulence and Mach wave radiations at high speeds. In addition to this there are instabilities which are responsible for the production of very painful tones caused by the coupling of fluid flow and acoustic waves. Apart from increase in noise levels if these tones are permitted to interact with surrounding structures, they can cause structural vibration and fatigue failure problems. This article discusses various types of noise in impinging jet and flow physics responsible for it. Acoustic and flow measurement for various impinging jet configuration is carried out. Further flow visualization is performed to show the special noise sources in the flow. © 2015 by ASME.
About the journal
JournalINTER-NOISE 2015 - 44th International Congress and Exposition on Noise Control Engineering
PublisherThe Institute of Noise Control Engineering of the USA, Inc.
Open AccessNo
Concepts (19)
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    Acoustic variables control
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    Atmospheric thermodynamics
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    Boundary layers
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    Electronic cooling
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    Fighter aircraft
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    Flow of fluids
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    FLUID DYNAMICS
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    Structural dynamics
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    Supersonic aerodynamics
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    Turbomachine blades
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    BOUNDARY LAYER TURBULENCE
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    Fatigue failures
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    Heating and cooling
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    Mach wave radiation
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    Noise generation
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    Structural vibrations
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    SUPERSONIC IMPINGING JETS
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    Turbulent mixing
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    Acoustic noise