Experiment on Finite Amplitude Sound Propagation in a Fluid with a Strong Sound Speed Gradient

2006 ◽  
Author(s):  
H. Hobæk
Keyword(s):  
Sound Speed ◽  
Sound Propagation ◽  
Finite Amplitude ◽  
Speed Gradient

Chemical amplification at the wave head of a finite amplitude gasdynamic disturbance

1977 ◽  
Vol 81 (2) ◽  
pp. 257-264 ◽  
Author(s):  
J. F. Clarke
Keyword(s):  
Shock Wave ◽  
Sound Speed ◽  
Method Of Characteristics ◽  
Ignition Time ◽  
Finite Amplitude ◽  
General State ◽  
Expansion Waves ◽  
Shock Wave Formation ◽  
Reactive Mixture ◽  
Background State

Consider a background state which consists of a spatially uniform chemically reactive mixture in a general state of disequilibrium. The analytical method of characteristics is used to show that a plane finite amplitude disturbance propagates through this system at the frozen sound speed and, if the degree of disequilibrium is sufficient, is amplified by the chemical reaction. Some comments are made about the time to shock-wave formation and its relation to the homogeneous explosion ignition time, and also about expansion waves, which are found to have a tendency towards fixed-strength ‘quenching waves’, their strength being proportional to the extent of the ambient disequilibrium.

Comparison of Sound Propagation Characteristic between Deep and Shallow Water

2014 ◽  
Vol 577 ◽  
pp. 1198-1201
Author(s):  
Zhang Liang ◽  
Chun Xia Meng ◽  
Hai Tao Xiao
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Sound Speed ◽  
Sound Propagation ◽  
Spherical Wave ◽  
Sound Field ◽  
Propagation Loss ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Propagation Law

The physical characteristics are compared between shallow and deep water, in physics and acoustics, respectively. There is a specific sound speed profile in deep water, which is different from which in shallow water, resulting in different sound propagation law between them. In this paper, the sound field distributions are simulated under respective typical sound speed profile. The color figures of sound intensity are obtained, in which the horizontal ordinate is distance, and the vertical ordinate is depth. Then we can get some important characteristics of sound propagation. The results show that the seabed boundary is an important influence on sound propagation in shallow water, and sound propagation loss in deep water convergent zone is visibly less than which in spherical wave spreading. We can realize the remote probing using the acoustic phenomenon.

Sign in / Sign up

Export Citation Format

Share Document