Indirect combustion noise: Experimental investigation of the vortex sound generation mechanism

2011 ◽  
Author(s):  
Nancy Kings ◽  
Karsten Knobloch ◽  
Friedrich Bake ◽  
Lars Enghardt
Keyword(s):  
Experimental Investigation ◽  
Generation Mechanism ◽  
Combustion Noise ◽  
Sound Generation ◽  
Vortex Sound

scholarly journals Experimental investigation of entropy waves’ evolution for understanding of indirect combustion noise in gas turbine combustors

Energy ◽  
2020 ◽  
Vol 195 ◽  
pp. 116978 ◽  
Author(s):  
S.M. Hosseinalipour ◽  
A. Fattahi ◽  
H. Khalili ◽  
F. Tootoonchian ◽  
N. Karimi
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Combustion Noise ◽  
Gas Turbine Combustors

Sound generation mechanism in low speed axial fans.

2010 ◽  
Vol 127 (3) ◽  
pp. 1837-1837 ◽  
Author(s):  
Stefano Bianchi ◽  
Alessandro Corsini ◽  
Anthony G. Sheard
Keyword(s):  
Generation Mechanism ◽  
Sound Generation ◽  
Low Speed ◽  
Axial Fans

Modeling and linear analysis of sound generation mechanism in sonic soot blowers

2019 ◽  
Vol 25 (17) ◽  
pp. 2305-2315
Author(s):  
A. Najafi ◽  
M. Asayesh ◽  
A. Siami
Keyword(s):  
Sound Wave ◽  
Parametric Study ◽  
Low Frequency ◽  
Linear Analysis ◽  
Generation Mechanism ◽  
Frequency Content ◽  
Sound Generation ◽  
Governing Equations ◽  
High Level ◽  
Frequency Sound Wave

Sonic soot blowers (SSBs) are nondestructive tools to prevent ashes and particle build-up on the surfaces of boilers or other similar instruments. For higher performance, sonic soot cleaners should generate a high level-low frequency sound wave. In this article, the sound generation mechanism in these tools has been modeled. Firstly, the governing equations of the diaphragm and the horn and coupling between them are derived. By linearization, a parametric study is performed to find the optimum design points. Based on the eigenvalue analysis, it is shown that the sound generation in sonic soot cleaners is due to instability of the interaction between the diaphragm and the horn. Moreover, it is found that the sound wave frequency is approximately equal to the lowest fundamental frequency of the horn or diaphragm. Finally, the frequency content of an SSB voice is investigated.

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