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    • 顾雨濛，李铁，魏义杰，赖哲渊，王斌.柴油喷雾蒸发仿真中KH-RT模型的数值试验研究[J].内燃机工程,2019,40(1):36-41.
    Numerical Study on KH-RT Model Constants in Simulation of Evaporating Diesel Spray
    DOI：10.13949/j.cnki.nrjgc.2019.01.006
    Key Words:Box Behnken design(BBD)  spray  Kelvin-Helmholtz & Rayleigh-Taylor(KH-RT)  breakup time constant
    Author NameAffiliation
    GU Yumeng, LI Tie, WEI Yijie, LAI Zheyuan, WANG Bin 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University， Shanghai 200240， China
    2.Collaborative Innovation Center for Advanced Ship and Deep Sea Exploration, Shanghai 200240, China 
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    Abstract:A numerical study based on the Box Behnken design(BBD) was made to analyze the Kelvin-Helmholtz & Rayleigh-Taylor(KH-RT) model constants in the simulation of evaporating diesel spray mixture. The mixing process of evaporating diesel spray was recorded by high-speed shadowgraph technique during fuel injection in a constant-volume vessel with the ambient temperature of 900 K, ambient density of 15 kg/m3 and injection pressure of 120 MPa. The simulated liquid- and vapor-phase penetrations were compared with the experimental results. According to the relative difference theory, the response surface method was adopted to evaluate the influence of each model constant on evaporating diesel spray mixture development. The results show that the breakup time constant plays a dominant role. Furthermore, an optimized combination of the KH-RT model constants was obtained and validated for predicting the evaporating diesel spray.
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