scholarly journals Numerical analysis of transient combustion response to acoustic oscillations in axisymmetric rocket motors

1998 ◽  
Author(s):  
Tae-Seong Roh ◽  
E. Culick
Keyword(s):  
Numerical Analysis ◽  
Acoustic Oscillations ◽  
Rocket Motors ◽  
Transient Combustion

scholarly journals GEOECOLOGICAL RISKS OF TECHNOGENIC NOISES AT LOW FREQUENCIES

2021 ◽  
Vol 4 (1) ◽  
pp. 137-144
Author(s):  
Oksana A. Kopylova ◽  
Marat S. Khairetdinov
Keyword(s):  
Numerical Analysis ◽  
Low Frequency ◽  
Vibration Velocity ◽  
Acoustic Oscillations ◽  
Railway Transport ◽  
Seismic Vibration ◽  
Time Analysis ◽  
Low Frequencies ◽  
Velocity Level ◽  
Seismic Vibrator

The article considers the estimation and prevention problem of ecologically dangerous influence of technogenic noises generated by moving transport, such as heavy tracked and wheeled transport, railway transport. The influence on the man and the environment of a low-frequency controlled CV-40 seismic vibrator [1] used for seismological research separately is considered. The influence of vibrations located in the area of low and infra-low frequencies is estimated. The field records of technogenic noises are analyzed. Numerical analysis and estimation of levels of geoecological risks associated with seismic vibration in the ground and acoustic oscillations in the atmosphere are presented. Spectral and spectral-time analysis of technogenic noises records are performed. The main ecologically dangerous frequency areas, which are the most characteristic for these sources, are separated. The dynamics of changes of the vibration velocity level over distances for heavy wheeled and tracked types of transport has been determined.

Effects of acoustic oscillations on flame dynamics of homogeneous propellants in rocket motors

1995 ◽  
Vol 11 (4) ◽  
pp. 640-650 ◽  
Author(s):  
Tae-Seong Roh ◽  
I-Shih Tseng ◽  
Vigor Yang
Keyword(s):  
Acoustic Oscillations ◽  
Rocket Motors ◽  
Flame Dynamics
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