Experimental study of characteristics of pressure waves excited by the pinch-effect in a conical channel

2008 ◽  
Vol 44 (3) ◽  
pp. 289-294
Author(s):  
A. Kapusta ◽  
B. Tilman
Keyword(s):  
Experimental Study ◽  
Pressure Waves ◽  
Pinch Effect ◽  
Conical Channel

Experimental Study on the Process of Gas Explosion in a Narrow Pipeline

2013 ◽  
Vol 454 ◽  
pp. 230-233
Author(s):  
Jian Jun Liang ◽  
Shu Liu ◽  
Xin Sheng Jiang ◽  
Dong Wang ◽  
Jian Zhong Zhou
Keyword(s):  
Experimental Study ◽  
Detonation Waves ◽  
Pressure Waves ◽  
Gas Explosion ◽  
Leading Role ◽  
Pressure Peak

In this paper, the process of the gas explosion waves was investigated in a closed pipeline. The research indicated that the interaction between pressure waves and flame waves were extensive in the course of gas explosion, which took effect of both enhancement and inhibition, and played a leading role at different stages. Not only could the flame waves raise the pressure peak and amplitude, but they also compressed the ascent stage of the pressure waves, stretched the descent stage. Eventually, detonation waves may come into being.

Growth of Flame Front Turbulence

1986 ◽  
Vol 108 (4) ◽  
pp. 877-881 ◽  
Author(s):  
T. Tsuruda ◽  
M. Harayama ◽  
T. Hirano
Keyword(s):  
Experimental Study ◽  
Combustion Chamber ◽  
Flame Front ◽  
Pressure Wave ◽  
High Speed ◽  
Wall Turbulence ◽  
Pressure Waves ◽  
Fuel Type ◽  
Fuel Concentration ◽  
Schlieren Photography

An experimental study was performed on the growth of flame front turbulence by stimulating a laminar propagating flame with weak pressure waves, which were generated by sudden breaking of the membrane separating a small chamber from the combustion chamber. The flame front behavior was explored by using high-speed schlieren photography. About one millisecond after the first weak pressure wave passed the flame front, a very fine disturbance appeared at the central part of the flame front, where no effect of the wall turbulence could appear. Then, the area and strength of the disturbance were observed to increase rapidly. The effects of the pressure wave intensity, fuel concentration, and fuel type on the growth of this type of flame front turbulence were examined in detail.

THEORETICAL AND EXPERIMENTAL STUDY OF A RESONATOR MODEL FOR ATTENUATION OF PRESSURE WAVES IN THE PRESENCE OF PULSATING FLOW ORIFICE PLATE

2015 ◽  
Author(s):  
Mara Nilza Estanislau Reis ◽  
Amanda Maria Araújo Mendes ◽  
Brenno de Rocha Brito ◽  
Yuri Veríssimo Soares
Keyword(s):  
Experimental Study ◽  
Pulsating Flow ◽  
Orifice Plate ◽  
Pressure Waves ◽  
Resonator Model

scholarly journals Effect of pool confinement on pressures around a block impacted by plunging aerated jets

2016 ◽  
Vol 43 (3) ◽  
pp. 201-210 ◽  
Author(s):  
Rafael Duarte ◽  
Anton J. Schleiss ◽  
António Pinheiro
Keyword(s):  
Experimental Study ◽  
Opposite Effect ◽  
Pressure Fluctuations ◽  
Air Entrainment ◽  
Flow Patterns ◽  
Hydraulic Structures ◽  
Pressure Waves ◽  
Pool Depth ◽  
Scour Hole ◽  
Rock Interface

The erosion caused by jets issued from hydraulic structures progressively develops a confined scour-hole on the riverbed. A realistic scour assessment must consider both the influence of the air entrained when the jet plunges into the pool and the flow patterns induced by bottom geometry. This experimental study systematically analyzes the combined influence of jet aeration and pool confinement on the dynamic pressures affecting the water–rock interface and inside 3D fissures around a block. The results show that confinement reduces mean pressures and pressure fluctuations when the pool is relatively deep, but almost no influence is found when the pool is shallow, while air entrainment has an opposite effect. Three mechanisms are identified, two of them depend on the pool depth. Furthermore, when a block is mobile, pressures are attenuated inside the surrounding joints. The consequent block vibrations and the presence of air reduce pressure waves celerity inside the fissures.

scholarly journals Experimental study on the attenuation of pressure waves in a cavity induced by flow boiling

2015 ◽  
Vol 61 ◽  
pp. 96-104 ◽  
Author(s):  
J. Rojas-Herrera ◽  
A. Velazquez ◽  
J.R. Arias ◽  
A. Barrero
Keyword(s):  
Experimental Study ◽  
Flow Boiling ◽  
Pressure Waves
Sign in / Sign up

Export Citation Format

Share Document