Frequency Characteristic of Self-Induced Flow Oscillation Caused by Supersonic Jet Impinging with Cylindrical Body : Effect on Pressure Ratio and Position for Frequency Characteristic

2003 ◽  
Vol 2003 (0) ◽  
pp. 185-186
Author(s):  
Masaki OOMORI ◽  
Tsuyoshi YASUNOBU ◽  
Hideo KASHIMURA
Keyword(s):  
Frequency Characteristic ◽  
Pressure Ratio ◽  
Supersonic Jet ◽  
Cylindrical Body ◽  
Flow Oscillation ◽  
Body Effect ◽  
Induced Flow

scholarly journals MECHANISMS OF GENERATION AND SOURCES OF NOISE IN SUPERSONIC JETS

Akustika ◽  
2019 ◽  
Vol 32 ◽  
pp. 144-150
Author(s):  
Vladislav Emelyanov ◽  
Aleksey Tsvetkov ◽  
Konstantin Volkov
Keyword(s):  
Pressure Ratio ◽  
Supersonic Jet ◽  
Numerical Data ◽  
Jet Flows ◽  
Noise Generation ◽  
Noise Sources ◽  
Cavity Depth ◽  
Flow Parameters ◽  
Nozzle Pressure ◽  
Physical Pattern

Interest in the development of models and methods focused on the mechanisms of noise generation in jet flows is due to strict noise requirements produced by various industrial devices, as well as the possibilities of using sound in engineering and technological processes. The tools of physical and computational modeling of gas dynamics and aero-acoustics problems are considered, and noise sources and mechanisms of noise generation in supersonic jet flows are discussed. The physical pattern of the flow in free supersonic under-expanded jets is discussed on the basis of experimental and numerical data, as well as the flow structure arising from the interaction of a supersonic under-expanded jet with a cylindrical cavity. The influence of the nozzle pressure ratio and cavity depth on the sound pressure level, amplitude and frequency characteristics of the flow parameters is studied.

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