CAJ | 학술논문

从描述粒子运动的微观层次出发，采用双向耦合技术，建立了一种适用于稀薄条件下两相流动的 DSMC 数值模拟方法。对相间相互作用进行解耦处理，实现了气固两相间动量和能量相互作用的模拟。相关算例验证了方法的可靠性。结果表明：在大样本统计平均条件下，该模拟方法能够保证相间动量和能量交换时守恒，固体颗粒尺寸、气体稀薄程度等条件对相间的相互作用有很大的影响。
종묘술입자운동적미관층차출발，채용쌍향우합기술，건립료일충괄용우희박조건하량상류동적 DSMC 수치모의방법。대상간상호작용진행해우처리，실현료기고량상간동량화능량상호작용적모의。상관산례험증료방법적가고성。결과표명：재대양본통계평균조건하，해모의방법능구보증상간동량화능량교환시수항，고체과립척촌、기체희박정도등조건대상간적상호작용유흔대적영향。
A numerical simulation approach is presented to simulate rarefied two phase flow by applying two—way coupling technical in DSMC method.The interaction between rarefied gas and solid particles is dealt with decoupled approximation to compute momentum and energy ex—change between phases.Results of simulation examples validate the methods and the models by the comparison of the present results with that of typical confirmed results from references,and indicate that it can ensure momentum and energy conservation between phases even in case of large sample number.A two—phase plume flow field from solid rocket engine is simulated using this present method.Away from the engine nozzle,gas and solid particles have a greater impact caused by temperature drop and increases of the speed of particles.The particles temperature away from the nozzle exit tends to be balanced.Simulation shows that the particle size and gas rarefaction would affect the interaction evidently.