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Large Eddy Simulation of Primary Breakup of Transverse Pulsed Liquid Jet in Supersonic Flow(PDF)

《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

Issue:
2020 01
Page:
87-95
Research Field:
Publishing date:

Info

Title:
Large Eddy Simulation of Primary Breakup of Transverse Pulsed Liquid Jet in Supersonic Flow
Author(s):
Lin SenShen ChibingXiao FengZhu Yuanhao
School of Aerospace Science,National University of Defence Technology,Changsha 410073,China
Keywords:
scramjet engineprimary breakuppulsed liquid jetinterface tracklarge eddy simulation
PACS:
V434
DOI:
10.11715/rskxjs.R201903009
Abstract:
In order to improve the atomization and mixing performance of liquid fuel in scramjet engines,a method of transverse pulsed injection into supersonic flow was proposed,and numerical calculation was carried out to investigate the effects of liquid jet pulsation on the primary breakup.The two-phase flow large eddy simulation(LES)algorithm was used to calculate the liquid jet atomization in the supersonic flow,and the coupled level set and volume of fluid(CLSVOF)method was used to track the gas-liquid interface.The compressible flow solver was used to obtain the gas phase,and the incompressible solver was used to obtain the liquid phase.The results showed that the surface breakup and liquid column breakup of the pulsed liquid jet were enhanced,and the jet breakup length was significantly shortened.In the studied regime of the pulsation frequency,the instability due to pulsation replaced the Rayleigh-Taylor instability and dominated the primary breakup of liquid jet.Due to the pulsation of the jet velocity,the penetration of the pulsed jet can be increased by 20% in comparison with the steady jet,and the width of the wake region can be expanded by 25%,showing better atomization and mixing

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Last Update: 2020-01-17