scholarly journals Visualization of reacting shock wave in single pulse supersonic combustion tube

2019 ◽  
Author(s):  
Mohammad Amri Mazlan ◽  
Mohd Yasin ◽  
Mazlan Abdul Wahid ◽  
Aminuddin Saat ◽  
Rashid Jamaludin ◽  
...  
Keyword(s):  
Shock Wave ◽  
Single Pulse ◽  
Supersonic Combustion ◽  
Combustion Tube

Stimulation of angiogenesis using single-pulse low-pressure shock wave treatment

2018 ◽  
Vol 96 (11) ◽  
pp. 1177-1187 ◽  
Author(s):  
Susinder Sundaram ◽  
Karthi Sellamuthu ◽  
Krishnaveni Nagavelu ◽  
Harikumar R Suma ◽  
Arpan Das ◽  
...  
Keyword(s):  
Shock Wave ◽  
Single Pulse ◽  
Low Pressure ◽  
Pressure Shock ◽  
Wave Treatment ◽  
Shock Wave Treatment ◽  
Stimulation Of

Inlet air and fuel flow pressure fluctuation effect on supersonic combustion

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
AmirMahdi Tahsini
Keyword(s):  
Shock Wave ◽  
Combustion Chamber ◽  
Pressure Fluctuations ◽  
Combustion Efficiency ◽  
Supersonic Combustion ◽  
Oblique Shock Wave ◽  
Reacting Flow ◽  
Content Type ◽  
Fuel Flow ◽  
Flow Stream

Purpose The purpose of this paper is to analyze the effect of pressure fluctuations on the combustion efficiency of the hydrogen fuel injected into the supersonic oxidizing cross flow. The pressure fluctuations are imposed on inlet air flow and also on the fuel flow stream. Two different situations are considered: the combustion chamber once without and again with the inlet standing oblique shock wave. Design/methodology/approach The pressure fluctuations are imposed on inlet air flow and also on the fuel flow stream. Two different situations are considered: the combustion chamber once without and again with the inlet standing oblique shock wave. The unsteady turbulent reacting flow solver is developed to simulate the supersonic flow field in the combustion chamber with detail chemical kinetics, to predict the time-variation of the combustion efficiency due to the imposed pressure fluctuations. Findings The results show that the response of the reacting flow field depends on both the frequency of fluctuations and the existence of the inlet shock wave. In addition, the inlet standing shock wave has some attenuating role, but the reacting flow shows an amplifying role on imposed oscillations which is also augmented by imposing anti-phase fluctuations on both inlet and fuel flow streams. Originality/value This study is performed to analyze the instabilities in the supersonic combustion which has not been considered before in this manner.

On the Supersonic Combustion of Hydrogen around a Conical Obstacle Considering Variable Specific Heats with Application to Scramjets

2015 ◽  
Vol 811 ◽  
pp. 162-166
Author(s):  
Sorin Berbente ◽  
Daniel Eugeniu Crunteanu ◽  
Corneliu Berbente
Keyword(s):  
Shock Wave ◽  
Detonation Wave ◽  
Numerical Method ◽  
Supersonic Combustion ◽  
Detonation Waves ◽  
Specific Heats ◽  
Combustion Speed ◽  
Combustion Of Hydrogen

One proposes a combined analytical-numerical method for the supersonic combustion around a conical obstacle, considering variable specific heats with temperature. One important aspect is to avoid the dissociation what is not possible if normal detonation waves (of Chapman-Jouguet type) occur. The Clarke model where the detonation wave is separated in a shock wave and a deflagation wave is able to reduce the temperature. Here conical waves are used. In order to characterize the combustion speed and intensity, new parameters are proposed. A comparison with the Chapman-Jouguet combustion is also presented.

scholarly journals Numerical Investigation of Bubble Cloud Dynamics in Shock Wave Lithotripsy

2002 ◽  
Author(s):  
Michel Tanguay ◽  
Tim Colonius
Keyword(s):  
Shock Wave ◽  
Shock Wave Lithotripsy ◽  
Focal Point ◽  
Free Field ◽  
Single Pulse ◽  
Curvilinear Coordinates ◽  
Artificial Kidney ◽  
Bubble Cloud ◽  
Extracorporeal Shock Wave ◽  
Cloud Dynamics

To provide greater understanding of some of the phenomena in Extracorporeal Shock Wave Lithotripsy (ESWL), we implemented a two-phase continuum model for cavitating flow and applied it to the simulation of bubble cloud dynamics in an electro-hydraulic lithotripter. Through the combination of a WENO shock capturing scheme, curvilinear coordinates system and ensemble averaged mixture model, we computed the evolution of the lithotripsy shock wave and the concomitant cavitation field. In this paper, we present the results for three different configurations: a single-pulse lithotripter (free field), a single-pulse lithotripter with rigid artificial kidney stone at the focal point, and a dual-pulse lithotripter. Qualitative and quantitative comparisons of the numerical results to experimental observations are also included.

Supersonic combustion induced by reflective shuttling shock wave in fan-shaped two-dimensional combustor

2019 ◽  
Vol 37 (3) ◽  
pp. 3741-3747 ◽  
Author(s):  
Masato Yamaguchi ◽  
Ken Matsuoka ◽  
Akira Kawasaki ◽  
Jiro Kasahara ◽  
Hiroaki Watanabe ◽  
...  
Keyword(s):  
Shock Wave ◽  
Supersonic Combustion ◽  
Two Dimensional

scholarly journals Review of experimental Richtmyer–Meshkov instability in shock tube: From simple to complex

2017 ◽  
Vol 232 (16) ◽  
pp. 2830-2849 ◽  
Author(s):  
Zhigang Zhai ◽  
Liyong Zou ◽  
Qiang Wu ◽  
Xisheng Luo
Keyword(s):  
Shock Wave ◽  
Experimental Study ◽  
Shock Tube ◽  
Inertial Confinement Fusion ◽  
Supernova Explosion ◽  
Supersonic Combustion ◽  
Three Dimensions ◽  
Compressible Turbulence ◽  
Converging Shock Waves ◽  
Planar Shock

Richtmyer–Meshkov (RM) instability is regarded as a central role for understanding the hydrodynamic processes involved in inertial confinement fusion, supersonic combustion and supernova explosion. Because of its academic implication and engineering applications, the RM instability has received much attention since it was proposed. As an important tool for studying RM instability, shock tube experiment on shock–fluid interface interaction has been widely adopted and great progress has been achieved in past decades. The generation of a shock wave, the formation of an initial interface and the diagnostic of flow field are the three elements for studying the RM instability experimentally. This review surveys the advances in experimental investigations of RM instability in shock tube environment. Originating from a simple configuration as a planar shock interacting with a simple perturbed interface, the experimental study of RM instability approaches more complex situations like a convergent shock with a simple interface, or a planar shock with a complex interface. It is then expected that the experimental study on the real circumstance may be realized by using a complex shock with a complex interface. Finally, we propose the following issues for future study: (1) evolution of the RM instability induced by cylindrically converging shock waves; (2) effect of the three dimensions on the RM instability; (3) interaction of perturbed shock wave with an initially uniform or perturbed interface; and (4) formation and mixing mechanism of the compressible turbulence in the final stage of the RM instability.

Effects of a Single-pulse Energy Deposition on Steady Shock Wave Reflection

Shock Waves ◽  
2006 ◽  
Vol 15 (5) ◽  
pp. 353-362 ◽  
Author(s):  
D. V. Khotyanovsky ◽  
A. N. Kudryavtsev ◽  
M. S. Ivanov
Keyword(s):  
Shock Wave ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Wave Reflection ◽  
Single Pulse ◽  
Single Pulse Energy ◽  
Shock Wave Reflection ◽  
Steady Shock
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