Numerical study on three-dimensional CJ detonation waves interacting with isotropic turbulence

Jin, Tai; Luo, Kun; Dai, Qi

doi:10.1007/s11434-016-1196-6

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…Here the CJ detonation represent a detonation process with combustion whereas the nonreactive shock represents the detonation without combustion. According to the CJ detonation theorem hypothesis: flow is onedimensional, regardless of the heat conduction, heat radiation and viscous friction dissipation effect; the detonation wave as strong discontinuity; after the detonation wave through chemical reaction and discharge instantaneous chemical reaction heat, reaction products in the thermal chemical equilibrium and thermodynamic equilibrium state; detonation wave front propagation process is stationary [5].…”

Section: The Approach Of Simulationmentioning

confidence: 99%

Analysis and Possible Improvements of Scramjet Engines: The Effective Thrust and the Combustion Stability Problems

Wang

2023

TNS

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The scramjet is the representative of the future jet engine, and it has irreplaceable advantages in terms of working performance and service life. Although it has been developed more than fifty years, there are many problems in the driven system of the scramjet engine. This paper mainly focuses on the problems of the effective thrust and the combustion stability. The research shows that how the pressure ratio affects the positive thrust and the combustion stability. Furthermore, this paper also shows that the elements which can affect the pressure ratio. The lower inlet air temperature is beneficial to enhance the thrust. According to the relevant research which apply the CJ detonation theorem to find the possible reason for the combustion instability. For the possible improvements, the research found that the engine thrust at different speed and the allowable maximum speed. The type of fuel and the reactivity of the fuel can influence the thrust.

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Section: The Approach Of Simulationmentioning

confidence: 99%

Analysis and Possible Improvements of Scramjet Engines: The Effective Thrust and the Combustion Stability Problems

Wang

2023

TNS

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TensorFlow solver for quantum PageRank in large-scale networks

Tang

Shi

et al. 2021

Science Bulletin

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Direct numerical simulation of particle dispersion in a three-dimensional spatially developing compressible mixing layer

et al. 2018

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By direct numerical simulations, the particle dispersion is systematically investigated in a three-dimensional spatially developing compressible mixing layer. The convective Mach number is 1.2 and particles interact with fluid through both the one- and two-way coupling. Six simulations are conducted with different particle diameters (Stokes numbers) or particle back-reaction. The compressible mixing layer is characterized by various vortical structures and unsteady shocklets, which both have significant effects on the dispersion of particles. The particles tend to accumulate in the peripheries of the vortical structures with high density, low vorticity, and high strain rate inside the mixing layer, as well as the high-density regions behind the shocklets outside the mixing layer. Due to the sweep and ejection effects, the particles from the high-speed side cluster in the high-speed streaks while those from the low-speed side collect in the low-speed steaks. Also, the particle mixing between the two streams skews towards the low-speed side. Compared with the other cases, medium particles show the strongest preferential concentration in the peripheries of vortices while small particles exhibit the most significant tendency to accumulate behind the shocklets. As the Stokes number decreases, the particle mixing is enhanced with more significant deviation towards the low-speed side. Besides, the particle back-reaction on fluid attenuates the preferential concentration. Outside the mixing layer, the number of the compression regions of the particle dispersion decreases, but the particles have stronger concentration behind the residual shocklets. The particle mixing as well as the skewness towards the low-speed side is also attenuated under the two-way coupling, which is attributed to the reduction of the vortex number and the centrifugal effects on particles.

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Numerical study on three-dimensional CJ detonation waves interacting with isotropic turbulence

Cited by 5 publications

References 26 publications

Analysis and Possible Improvements of Scramjet Engines: The Effective Thrust and the Combustion Stability Problems

Analysis and Possible Improvements of Scramjet Engines: The Effective Thrust and the Combustion Stability Problems

TensorFlow solver for quantum PageRank in large-scale networks

Direct numerical simulation of particle dispersion in a three-dimensional spatially developing compressible mixing layer

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