【摘 要】
：
The classical theory of liquid jet instabilities has hardly considered the effects of real-fluid thermodynamics on the liquid fuel spray at the supercritica
【机 构】
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SchoolofMechanical,ElectronicandControlEngineering,BeijingJiaotongUniversity,P.R.China
【出 处】
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13th International Conference on Liquid Atomization and Spra
论文部分内容阅读
The classical theory of liquid jet instabilities has hardly considered the effects of real-fluid thermodynamics on the liquid fuel spray at the supercritical or subcritical conditions.However,such supercritical or subcritical conditions are always existed in normal operation environment for actual engines,and the current model of the spray atomization for the mentioned conditions is questionable.Therefore,the real-fluid behaviors must be taken considered into an accurate model,and the method of a multicomponent fuel mixture formulation under the supercritical or subcritical conditions is a promising solver to the consideration.In the present article,a linear theory model has been applied for the investigation on the instability and breakup of the fuel spray at supercritical or subcritical environment since it has a consideration of the spatially variation of surface tension at the liquid-gas interface.The spatial variation of surface tension is obtained from the states of real-fluid thermodynamics that is upon both surface tension and transient heat-transfer between the surrounding gas and the liquid column,and via which the classical interface breakup theory and the effects of the real fluid thermodynamic state is coupled.Such analysis method could provide a great help to the understanding the fuel spray breakup mechanisms under supercritical or subcritical conditions,consequently a significant guide to understand the actual operation conditions within advanced diesel engines.
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