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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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Journal ArticleDOI
TL;DR: A robust sharp-interface immersed boundary method for numerically studying high speed flows of compressible and viscous fluids interacting with arbitrarily shaped either stationary or moving rigid solids.

38 citations

Journal ArticleDOI
01 Jan 2011
TL;DR: In this paper, a sensitivity of the measured profiles to the rate constant of the primary ethylene decomposition reaction, C2H4→C2H2+H2 was demonstrated, allowing a determination of the rate constants for this reaction using the ethylene time-histories.
Abstract: Ethylene concentration time-histories were measured behind reflected shock waves in ethylene/argon and n-heptane/argon mixtures using 10.5 μm CO2 laser absorption. Reflected shock conditions covered temperatures between 1350 and 1950 K, pressures between 1.3 and 3.3 atm, and fuel concentrations of 1% ethylene and 300 ppm n-heptane in argon. The ethylene absorption cross-section at this wavelength was determined over similar pressures and temperatures using both absorption measurements in a heated-cell FTIR and laser absorption/shock tube measurements. Measured ethylene concentration time-histories during ethylene pyrolysis were compared to constant volume simulations using the Marinov et al. (1998) mechanism. A sensitivity of the measured profiles to the rate constant of the primary ethylene decomposition reaction, C2H4 → C2H2 + H2 was demonstrated, allowing a determination of the rate constant for this reaction using the ethylene time-histories. Ethylene concentrations, measured during n-heptane pyrolysis, were also compared to simulations using the Sirjean et al. (2009)/JetSurF 1.0 mechanism. Incorporation of the new reaction rate constant k1 provided better agreement between the measured ethylene concentration profiles and the simulations for both ethylene and n-heptane pyrolysis.

38 citations

Journal ArticleDOI
01 Dec 2020
TL;DR: In this article, a new manually operated pressure driven shock tube is proposed and demonstrated using acoustic method, which is used to measure both pressure and time lag of shock wave between the sensors.
Abstract: A new manually operated pressure driven shock tube is proposed and demonstrated. Shock wave-associated parameters like velocity, Mach number, pressure, and temperature are computed using acoustic method. Experiment involves manually loading train of pressure pulses into a driver tube using a bicycle pump. The high pressure buildup in driver tube ruptures the diaphragm at critical pressure and generates a propagating shock wave in the driven section coupled with sensor section in which a couple of microphones are separated by a fixed distance. The propagating shock wave acoustical profile is recorded and its arrival time lag is measured using sound recording software. In a conventional method, piezo-electric pressure sensors are utilized to measure both pressure and time lag of shock wave between the sensors. In the proposed method, microphones are utilized to measure time lag of shock wave with sampling frequency of 768 KHz using computer supporting audio software. Utilizing time data, the said shock wave parameters are evaluated and reported. The performance of the proposed shock tube is compared with manually operated piston-driven Reddy tube.

38 citations

Journal ArticleDOI
Erjiang Hu1, Lun Pan1, Zhenhua Gao1, Xin Lu1, Xin Meng1, Zuohua Huang1 
TL;DR: In this paper, a systematic measurement related to the ignition delay times were conducted for H 2 /O 2 mixtures diluted with argon over the temperatures from 850 K to 1500 K, the pressures from 1.2 to 16.0, and the equivalence ratios of 0.5, 1.0 and 2.0.

38 citations

Journal ArticleDOI
Abstract: The high-temperature, high-pressure pyrolysis of the prototype aromatic, benzene, has been studied behind reflected shock waves in the UIC High Pressure Single Pulse Shock Tube. Three sets of experiments were performed at nominal pressures of 30 and 50 bars in the high temperature regime from 1200–1800 K. Stable species sampled from the shock tube were analyzed offline using gas chromatographic techniques. The present data set was simulated using the three most recent models, two of the models developed and validated against high-temperature benzene pyrolysis shock-tube data for stable species profiles as well as H atom production rates and the third model, a “work-in-progress” model from our laboratory aimed at resolving the high-pressure combustion of primary aromatics such as benzene and toluene. The simulations reflect the complexities and uncertainties involved not only in describing the primary decay steps but also the subsequent high-temperature secondary chemistry for even the simplest ar...

38 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023148
2022285
2021134
2020175
2019173
2018159