This paper deals with an experimental investigation on the suppression of high-speed jet noise using air/water microjet injection at the nozzle exit. The far-field acoustic measurements from a high temperature Mj = 1.38 and Mj = 0.9 axisymmetric jet issuing from a converging nozzle show the suppression of screech tones, Mach wave radiation/crackle and mixing noise due to the use of microjets. Estimations of the contributions of different noise sources to the far-field sound are made using the current data supported by observations of previous investigators. It appears that the mixing noise reduction due to elimination of large eddies is found to be about 3–5 dB. Any further reduction of noise may only be accomplished by significant turbulence suppression and thermodynamic changes in the jet.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3697-5
PROCEEDINGS PAPER
On the Limitations of High Speed Jet Noise Suppression (Keynote Paper) Available to Purchase
Anjaneyuly Krothapalli,
Anjaneyuly Krothapalli
FAMU-FSU College of Engineering, Tallahassee, FL
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Brenton Greska,
Brenton Greska
FAMU-FSU College of Engineering, Tallahassee, FL
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Vijay Arakeri
Vijay Arakeri
FAMU-FSU College of Engineering, Tallahassee, FL
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Anjaneyuly Krothapalli
FAMU-FSU College of Engineering, Tallahassee, FL
Brenton Greska
FAMU-FSU College of Engineering, Tallahassee, FL
Vijay Arakeri
FAMU-FSU College of Engineering, Tallahassee, FL
Paper No:
FEDSM2003-45055, pp. 287-294; 8 pages
Published Online:
February 4, 2009
Citation
Krothapalli, A, Greska, B, & Arakeri, V. "On the Limitations of High Speed Jet Noise Suppression (Keynote Paper)." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 2: Symposia, Parts A, B, and C. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 287-294. ASME. https://doi.org/10.1115/FEDSM2003-45055
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