关键词: 两相流;流动分布;计算流体力学;收油效率;润滑系统

Abstract: In order to study the flow process in the under-race lubrication system and the influencing factors of the oil capture efficiency of the oil scoop， based on the VOF (Volume of Fluid) two-phase flow model and the numerical calculation method of the slide mesh model, the calculation model of the internal flow field of the under-race lubrication is established. Through the numerical calculation, the oil capture efficiency of the oil scoop was obtained and the validity of the numerical calculation results was verified. The effects of different structural parameters on the oil capture efficiency were analyzed and discussed. The calculation results show that the oil capture efficiency and flow phenomenon obtained by this paper numerical method are consistent with the existing experimental and numerical calculation results. The angle of the oil jet nozzle and the radius of the oil scoop mainly affect the splash volume of the oil jet impinging oil scoop blade and the amount of oil that is cut by oil scoop blade. The oil capture efficiency depends on the relative values of the above two reasons. , and ,, the oil capture efficiency has reached a maximum value. The number of oil scoop blades and the distance between the oil jet nozzle and the tip of the oil blade affect the time interval of the oil scoop blade cutting oil jet and the flow of oil jet before it reaches the oil scoop blade, respectively. This does not affect the splashing amount of the oil jet impinging the oil scoop blade and the cutting oil jet by the oil scoop blade, which has little effect on the oil capture efficiency.

Key words: Two-phase flow;Flow distribution;Computational fluid dynamics;Oil capture efficiency;Lubrication system