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

Author(s):  
Nancy Kings ◽  
Karsten Knobloch ◽  
Friedrich Bake ◽  
Lars Enghardt
Energy ◽  
2020 ◽  
Vol 195 ◽  
pp. 116978 ◽  
Author(s):  
S.M. Hosseinalipour ◽  
A. Fattahi ◽  
H. Khalili ◽  
F. Tootoonchian ◽  
N. Karimi

2010 ◽  
Vol 127 (3) ◽  
pp. 1837-1837 ◽  
Author(s):  
Stefano Bianchi ◽  
Alessandro Corsini ◽  
Anthony G. Sheard

2019 ◽  
Vol 25 (17) ◽  
pp. 2305-2315
Author(s):  
A. Najafi ◽  
M. Asayesh ◽  
A. Siami

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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