Effects of an accompanied gas jet on transverse liquid injection in a supersonic crossflow

Hu, Runsheng; Li, Qinglian; Li, Chun; Li, Chenyang

doi:10.1016/j.actaastro.2019.01.040

Cited by 30 publications

(2 citation statements)

References 36 publications

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“…The simulation mainly involves the two-phase mixing of water vapor and liquid water, and the Euler model has high accuracy [9]. The Euler model adopts the concept of phase volume fraction.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

CFD Simulation of the Cavitation Behaviour in Single Jet Process via Outlet Pressure

Zhang

Chai

et al. 2022

J. Phys.: Conf. Ser.

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Cavitation effect is the most common phenomenon in the process of jet. In this work, the method of CFD numerical simulation is used to study the cavitation behaviour in the process of single hole jet. In order to obtain the mixing situation and change process of gaseous water and liquid water produced in the nozzle, the Euler multiphase flow model and the realizable k-epsilon model in the turbulence model are used. The simulation results show that the degree and frequency of liquid column breakage of cavitation water jet are far higher than those of ordinary water jet. And the structure of the nozzle also has the most ideal situation. When the nozzle inlet size is 20 mm, the nozzle diameter is 1 mm, and the nozzle length is 5 mm, which is most conducive to the growth and diffusion of cavitation bubbles. The cavitation effect increases with the increase of the inlet jet velocity, but the promotion effect does not increase significantly when the inlet velocity is greater than 2.5 m/s. From the perspective of energy consumption, the optimum velocity at this time is 2.5 m/s. And the pressure environment at the nozzle outlet also affects the cavitation phenomenon, mainly as follows: positive pressure can inhibit the cavitation effect, negative pressure can promote the cavitation effect, but the negative pressure has a limited effect on the degree of cavitation.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

CFD Simulation of the Cavitation Behaviour in Single Jet Process via Outlet Pressure

Zhang

Chai

et al. 2022

J. Phys.: Conf. Ser.

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show abstract

“…It was found by Lin [30] that an enhanced surface breakup, liquid column breakup, and shorter breakup length could be obtained with a pulsed jet with the help of the LES and CLSVOF methods. Hu [31] found that a gas-accompanied jet could improve jet penetration significantly using high-speed photography technology. Zhao [32,33], by employing high-speed imaging and the Euler-Lagrange method, found that hydrogen-water jets could enhance the penetration and mixing effects, especially via constant-flow countercurrent injection.…”

Section: Introductionmentioning

confidence: 99%

Investigations of the Atomization Characteristics and Mechanisms of Liquid Jets in Supersonic Crossflow

Zhou,

Chang,

Shan

2023

Aerospace

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In the combustion chamber of scramjets, fuel jets interact with supersonic airflow in the form of a liquid jet in crossflow (LJIC). It is difficult to achieve adequate jet–crossflow mixing and the efficient combustion of fuel in an instant. Large eddy simulation (LES), the coupled level-set and volume of fluid (CLSVOF) method, and an adaptive mesh refinement (AMR) framework are used to simulate supersonic LJICs in this article. This way, LJIC atomization characteristics and mechanisms can be further explored and analyzed in detail. It is found that the surface waves of the liquid column exist in a two-dimensional form, including vertical and spanwise directions. Column breakup occurs when all the spanwise surface waves between adjacent vertical surface waves break up. Bow shock waves, composed of multiple connected arcuate shock waves, are dynamic and will change with the evolution of the liquid column. The vortex ring movement of supersonic LJICs, whose trends in the vertical and spanwise directions are different, is relatively complex, which is due to the complex and time-dependent shape of liquid columns.

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Liquid Jet Breakup and Penetration in a Gas Cross-Flow -An Experimental Study

Pourrousta,

Larimi,

Biglarian

et al. 2023

Exp Tech

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Effects of an accompanied gas jet on transverse liquid injection in a supersonic crossflow

Cited by 30 publications

References 36 publications

CFD Simulation of the Cavitation Behaviour in Single Jet Process via Outlet Pressure

CFD Simulation of the Cavitation Behaviour in Single Jet Process via Outlet Pressure

Investigations of the Atomization Characteristics and Mechanisms of Liquid Jets in Supersonic Crossflow

Liquid Jet Breakup and Penetration in a Gas Cross-Flow -An Experimental Study

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