A Simple Model for Study of Sound Generation Mechanism in Mixing Layers

2012 ◽  
Vol 11 (3-4) ◽  
pp. 447-458 ◽  
Author(s):  
Lin Zhou ◽  
Mingjun Wei ◽  
De-Jun Sun
Keyword(s):  
Simple Model ◽  
Generation Mechanism ◽  
Mixing Layers ◽  
Sound Generation

Adaptive linear list reorganization under a generalized query system

1995 ◽  
Vol 32 (03) ◽  
pp. 793-804 ◽  
Author(s):  
R. S. Valiveti ◽  
B. J. Oommen ◽  
J. R. Zgierski
Keyword(s):  
Simple Model ◽  
Query Processing ◽  
Generation Mechanism ◽  
Linear List ◽  
Query Generation ◽  
Query System ◽  
The Individual

We consider the problem of reorganizing a linear list, when the individual queries consist of accesses to a subset of the elements stored, as opposed to the individual elements themselves. In this paper, which to our knowledge represents the first reported result in this model of query processing, we first propose a simple model for a query generator which emits set queries. Subsequently, we present extensions to the classical move-to-front (MTF) and transposition (TR) rules under this generalized query generation mechanism and analyze their performance.

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.

scholarly journals Sound Generation in Chemically Reacting Mixing Layers.

2000 ◽  
Vol 66 (648) ◽  
pp. 2117-2124 ◽  
Author(s):  
Ye LI ◽  
Mamoru TANAHASHI ◽  
Toshio MIYAUCHI
Keyword(s):  
Mixing Layers ◽  
Sound Generation ◽  
Chemically Reacting

scholarly journals Global and Koopman modes analysis of sound generation in mixing layers

2013 ◽  
Vol 25 (12) ◽  
pp. 124101 ◽  
Author(s):  
G. Song ◽  
F. Alizard ◽  
J.-C. Robinet ◽  
X. Gloerfelt
Keyword(s):  
Mixing Layers ◽  
Sound Generation

Sound generation mechanism radiated from bubble

2016 ◽  
Vol 2016 (0) ◽  
pp. 0722
Author(s):  
Takao OKU ◽  
Hiroyuki HIRAHARA ◽  
Syoh YOSHIZAKI
Keyword(s):  
Generation Mechanism ◽  
Sound Generation
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