Effect of Thermal Actuator on Vortex Characteristics in Supersonic Shear Layer

Shi, Jingchang; Yan, Hong; Bai, Gege; Lin, Kae‐Long

doi:10.2514/6.2017-4307

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…It was found that the oblique shock wave induced by the thermal choking effect of discharge not only enhances the mixing of the fuel in the shear layer but also increases the pressure in the cavity, which contributes to fuel combustion. Shi et al [14] studied the effects of a pulsed discharge on the control of mixing in a circular tube-free jet. Their results showed that the pulsed discharge at a certain frequency effectively promotes the development of the large-scale structures of the jet's shear layer.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Effects of Arrayed Pulsed Energy Depositions on a Supersonic Combustor

Cai

Gao

Wang

et al. 2022

International Journal of Aerospace Engineering

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This paper proposes a method to improve the mixing efficiency of a supersonic combustor by using arrayed pulsed energy depositions, and this method is verified by a numerical simulation. In the simulation, the Navier-Stokes equations with an energy source are solved to simulate the effects of energy depositions in various distributions on the fuel mixture in the combustor. It is found that the energy deposition arranged in the streamwise direction leads to a significant improvement in the mixing efficiency and maximum concentration decay rate of the ethylene fuel by increasing the scale of the jet-induced counter-rotating vortex pair. The energy deposition arranged in the spanwise direction introduces another counter-rotating vortex pair which can also contribute to the fuel mixture. By comparison, the energy deposition distributed in the streamwise direction and downstream of the jet orifice is shown to be the most effective case in the fuel mixing enhancement. Under the energy deposition, the wall pressure on the trailing edge of the cavity is increased which leads to a decrease in the total pressure recovery of the combustor, but this decrease is not significant.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Effects of Arrayed Pulsed Energy Depositions on a Supersonic Combustor

Cai

Gao

Wang

et al. 2022

International Journal of Aerospace Engineering

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show abstract

Study of Mixing Enhancement in Helium Jet/Shock Interaction by Laser Pulses

Liu

Yan

2022

AIAA Journal

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Numerical Study on Transverse Jet Mixing Enhanced by High Frequency Energy Deposition

et al. 2022

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Supersonic incoming flow has a large momentum, which makes it difficult for transverse jets to have a large penetration depth due to the strong compression of the incoming flow. This impacts the mixing efficiency of the jet in the supersonic combustor. This paper proposes a method to improve the mixing efficiency of a rectangular flow field model using pulsed energy deposition, which is verified numerically. In the simulations, the Navier–Stokes equations with an energy source are solved to simulate the effects of energy deposition with various distributions on the fuel mixture. The results show that the energy deposition increases the turbulent kinetic energy, which enlarges the scale of the flow vortex and improves the fuel mixing performance. The energy deposition is distributed upstream and significantly improves the mixing performance. Energy deposition can improve the penetration depth of fuel, which is more significant when the energy deposition is distributed downstream of the jet orifice. The energy deposition also slightly reduces the total pressure recovery coefficient. In general, an energy deposition that is distributed upstream of the jet has the best effect on the mixing efficiency.

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Effect of Thermal Actuator on Vortex Characteristics in Supersonic Shear Layer

Cited by 3 publications

References 16 publications

Numerical Study on Effects of Arrayed Pulsed Energy Depositions on a Supersonic Combustor

Numerical Study on Effects of Arrayed Pulsed Energy Depositions on a Supersonic Combustor

Study of Mixing Enhancement in Helium Jet/Shock Interaction by Laser Pulses

Numerical Study on Transverse Jet Mixing Enhanced by High Frequency Energy Deposition

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