Investigations of the acoustic field produced by a supersonic jet

2019 ◽  
Keyword(s):  
Acoustic Field ◽  
Supersonic Jet

CALCULATION OF THE INTEGRAL NOISE LEVEL AT A FIELD POINT OF A FREE SUPERSONIC JET OF A ROCKET ENGINE

Akustika ◽  
2020 ◽  
Vol 36 (36) ◽  
pp. 22-24
Author(s):  
Anatoly Kochergin ◽  
Valeeva Ksenia
Keyword(s):  
Acoustic Field ◽  
Noise Level ◽  
Rocket Engine ◽  
Supersonic Jet ◽  
Noise Sources ◽  
Field Point

The paper considers an acoustic field created by a supersonic jet (CES) of a rocket engine freely flowing into flooded space. The acoustic field was presented in the form of a diagram of noise isobars, from which it can be seen that the acoustic field is formed by two effective noise sources: the nearest one, lying at a distance of 5-10 calibers from the nozzle cut and the far one, lying at a distance of 15-30 calibers from the nozzle cut.

Numerical Prediction of an Acoustic Field of a Supersonic Jet Impinging on a Plate at Different Inclination Angles

2014 ◽  
Author(s):  
Vladimir Golubev ◽  
Anstasios Lyrintzis ◽  
Reda R. Mankbadi ◽  
Konstantin A. Kurbatskii ◽  
Barrett Guenthoer
Keyword(s):  
Acoustic Field ◽  
Supersonic Jet ◽  
Numerical Prediction ◽  
Inclination Angles

Acoustic field of a shielded rectangular supersonic jet

2015 ◽  
Vol 138 (3) ◽  
pp. 1915-1915
Author(s):  
Ephraim Gutmark ◽  
Pablo Mora ◽  
Florian Baier
Keyword(s):  
Acoustic Field ◽  
Supersonic Jet

Acoustics measurements of military-style supersonic beveled nozzle jets with interior corrugations

2016 ◽  
Vol 16 (1-2) ◽  
pp. 21-43 ◽  
Author(s):  
Russell W Powers ◽  
Dennis K McLaughlin
Keyword(s):  
Noise Reduction ◽  
Acoustic Field ◽  
High Speed ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Operating Conditions ◽  
Military Aircraft ◽  
Azimuthal Dependence ◽  
Penn State ◽  
Mixing Noise

Increasingly powerful and noisy military aircraft have generated the need for research leading to the development of supersonic jet noise reduction devices. The hot, high speed supersonic jets exhausting from military aircraft during takeoff present a most challenging problem. The present study extends prior research on two methods of noise reduction. The first is the internal nozzle corrugations pioneered by Seiner et al. and the second is the beveled exit plane explored most recently by Viswanathan. A novel research idea of creating fluidic corrugations similar to the nozzle corrugations has been initiated by Penn State. To further the understanding and analysis of the fluidic corrugations, the present study focuses on the flow field and acoustic field of nozzles with two, three, and six conventional, hardwalled corrugations. The effect of the combination of the internal corrugations with a beveled nozzle is explored. The results show that significant noise reductions of over 3 dB of the mixing noise and the broadband shock-associated noise can be achieved. The combination of the beveled nozzle and the internal nozzle corrugations showed that there is less azimuthal dependence of the acoustic field than for the purely beveled nozzle. The combination nozzle was shown to reduce the noise over a wider range of polar angles and operating conditions than either the purely beveled nozzle or the purely corrugated nozzle.

CALCULATION OF THE FREQUENCY CHARACTERISTICS AT THE POINT OF THE ACOUSTIC FIELD OF A FREE SUPERSONIC JET OF A ROCKET ENGINE

Akustika ◽  
2020 ◽  
Vol 36 (36) ◽  
pp. 33-35
Author(s):  
Anatoly Kochergin ◽  
Valeeva Ksenia
Keyword(s):  
Acoustic Field ◽  
Rocket Engine ◽  
Supersonic Jet ◽  
Frequency Characteristics ◽  
Cold Air ◽  
Air Jets

The paper studies the frequency characteristics of the acoustic field of a free supersonic jet of a powder rocket engine. The results were compared with similar results of free supersonic cold air jets by a number of other authors.

Interaction between a supersonic jet and an acoustic field

1973 ◽  
Vol 5 (4) ◽  
pp. 598-608
Author(s):  
M. G. Lebedev ◽  
G. F. Telenin
Keyword(s):  
Acoustic Field ◽  
Supersonic Jet

Studies of the Acoustic Field Generated by a Supersonic Jet

2019 ◽  
Vol 32 (4) ◽  
pp. 442-449
Author(s):  
D. A. Marakasov ◽  
V. M. Sazanovich ◽  
R. Sh. Tsvyk ◽  
A. N. Shesternin ◽  
D. A. Gubanov
Keyword(s):  
Acoustic Field ◽  
Supersonic Jet
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