Topic
Shock tube
About: Shock tube is a research topic. Over the lifetime, 6963 publications have been published within this topic receiving 99372 citations.
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TL;DR: A modified model based on the Bell equation is proposed, which well predicts the perturbation growth in a converging geometry from early to late stages before the reshock, and it is found that the flow compressibility is significant in the converging Richtmyer-Meshkov instability.
Abstract: We report the first measurements of the perturbation amplitude in the converging Richtmyer-Meshkov instability in a semiannular shock tube. At early stages, the amplitude growth agrees well with the impulsive model considering the geometrical convergence effect. A quick decrease of the growth rate at late time, even to be negative, before the reshock is observed for the first time. The reduction of the growth rate is ascribed to the Rayleigh-Taylor stabilization caused by the interface deceleration motion only presented in the converging circumstance. By reasonably evaluating the Rayleigh-Taylor stabilization, a modified model based on the Bell equation is proposed, which well predicts the perturbation growth in a converging geometry from early to late stages before the reshock. It is also found that the flow compressibility is significant in the converging Richtmyer-Meshkov instability.
52 citations
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TL;DR: In this paper, the high pressure and temperature kinetics of n -propylbenzene oxidation were investigated in the High Pressure Single Pulse Shock Tube at University of Illinois at Chicago.
52 citations
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TL;DR: In this paper, a gas-phase mixture of aviation kerosene Jet-A with air at pressures of 10 and 20 atm was measured using OH ∗ emission at 309nm and CH 3 absorption at 3.39μm.
52 citations
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TL;DR: In this paper, the effect of a shock passing through an arbitrarily shaped interface y(x,0) between two fluids is considered and the evolution of the interface into a new shape is found by applying the linear, classical Richtmyer-Meshkov instability result to each mode in the Fourier expansion of the original interface.
Abstract: We consider the effect of a shock passing through an arbitrarily shaped interface y(x,0) between two fluids. The evolution of the interface into a new shape, written formally as y(x,t)=y(x,0)+tF(x), is found by applying the linear, classical Richtmyer–Meshkov instability result to each mode in the Fourier expansion of the original interface. We provide several examples where the new shape F(x) can be found analytically. For any interface y(x,0) we define an associated dual interface ydual(x,0) and show that F(x)=dydual(x,0)∕dx. Representing a shock by a new mathematical operator we find how y(x,0),ydual(x,0), and F(x) transform under the effect of a shock. Kink-singularities are found in F(x) when and where y(x,0) has a discontinuous change in its first derivative. These are the locations where jetting occurs. We briefly discuss the effects of nonlinearity, compressibility, viscosity, etc., all of which suppress kink-singularities, and present hydrocode simulations of shock tube and high-explosive-driven ...
52 citations
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TL;DR: In this paper, a converging lens geometry is used to focus a planar shock wave resulting in the ignition of a mixture of H 2, O 2 and Xe (55, 30% and 15%, respectively) in N 2.
52 citations