Decomposing one‐dimensional acoustic pressure response into propagating and standing waves

1988 ◽  
Vol 84 (4) ◽  
pp. 1536-1541 ◽  
Author(s):  
Charles E. Spiekermann ◽  
Clark J. Radcliffe
Keyword(s):  
Acoustic Pressure ◽  
Standing Waves ◽  
Pressure Response ◽  
One Dimensional

Pore pressure response of seabed in standing waves and its mechanism

2014 ◽  
Vol 91 ◽  
pp. 213-219 ◽  
Author(s):  
Hu Wang ◽  
Hong-jun Liu ◽  
Min-sheng Zhang
Keyword(s):  
Pore Pressure ◽  
Standing Waves ◽  
Pressure Response ◽  
Pore Pressure Response

Sound Generation by a Centrifugal Pump at Blade Passing Frequency

1998 ◽  
Vol 120 (4) ◽  
pp. 736-743 ◽  
Author(s):  
M. Morgenroth ◽  
D. S. Weaver
Keyword(s):  
Flow Rate ◽  
Acoustic Pressure ◽  
Flow Behavior ◽  
Pressure Fluctuations ◽  
Standing Waves ◽  
Acoustic Resonance ◽  
Piping System ◽  
Hydraulic Pressure ◽  
Pump Speed ◽  
Blade Passing Frequency

This paper reports the results of an experimental study of the pressure pulsations produced by a centrifugal volute pump at its blade passing frequency and their amplification by acoustic resonance in a connected piping system. Detailed measurements were made of the pressure fluctuations in the piping as a function of pump speed and flow rate. A semi-empirical model was used to separate acoustic standing waves from hydraulic pressure fluctuations. The effects of modifying the cut-water geometry were also studied, including the use of flow visualization to observe the flow behavior at the cut-water. The results suggest that the pump may act as an acoustic pressure or velocity source, depending on the flow rate and the cut-water geometry. At conditions of acoustic resonance, the pump acted as an open termination of the piping, i.e., as a node in the acoustic pressure standing waves. Rounding the cut-water had the effect of reducing the amplitude of acoustic resonance, apparently because of the ability of the stagnation point to move and thereby reduce the vorticity generated.

scholarly journals Real Space Imaging of One-Dimensional Standing Waves: Direct Evidence for a Luttinger Liquid

2004 ◽  
Vol 93 (16) ◽  
Author(s):  
Jhinhwan Lee ◽  
S. Eggert ◽  
H. Kim ◽  
S.-J. Kahng ◽  
H. Shinohara ◽  
...  
Keyword(s):  
Direct Evidence ◽  
Luttinger Liquid ◽  
Standing Waves ◽  
Real Space ◽  
One Dimensional

One-Dimensional Shock-Induced Pore Pressure Response in Saturated Carbonate Sand

2002 ◽  
Vol 25 (3) ◽  
pp. 9927
Author(s):  
L David Suits ◽  
TC Sheahan ◽  
GE Veyera ◽  
WA Charlie ◽  
ME Hubert
Keyword(s):  
Pore Pressure ◽  
Pressure Response ◽  
Carbonate Sand ◽  
One Dimensional ◽  
Pore Pressure Response

scholarly journals Standing Waves in One-Dimensional Resonator Containing an Ideal Isothermal Gas Affected by the Constant Mass Force

2017 ◽  
Vol 42 (2) ◽  
pp. 263-271
Author(s):  
Anna Perelomova
Keyword(s):  
Boundary Conditions ◽  
Acoustic Waves ◽  
Standing Waves ◽  
Ideal Gas ◽  
Excess Pressure ◽  
Mass Force ◽  
Constant Mass ◽  
Total Field ◽  
One Dimensional ◽  
Isothermal Gas

Abstract The study is devoted to standing acoustic waves in one-dimensional planar resonator which containing an ideal gas. A gas is affected by the constant mass force. Two types of physically justified boundary conditions are considered: zero velocity or zero excess pressure at both boundaries. The variety of nodal and antinodal points is determined. The conclusion is that the nodes of pressure and antinodes of velocity do not longer coincide, as well as antinodes of pressure and nodes of velocity. The entropy mode may contribute to the total field in a resonator. It is no longer isobaric, in contrast to the case when the external force is absent. Examples of perturbations inherent to the entropy mode in the volume of a resonator are discussed.

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