The under-race lubrication system providing a moderate amount of oil to high-speed bearings is one of the key factors to ensure its good lubrication and cooling. To investigate the oil capture performance of the oil scoop, a complete numerical calculation model was established, and unsteady simulations of oil–gas two-phase flow inside the under-race lubrication system were carried out. The results indicate that the oil capture efficiency increases first and then decreases with increasing rotating speed at different oil jet velocities. The ratio of the rotating Reynolds number of the oil scoop to the Reynolds number of the oil jet corresponding to the maximum oil capture efficiency changes linearly with oil jet velocity. There are three variation trends of oil capture efficiency at different rotating speeds with the increase of oil jet velocity: monotonically decreasing, first increasing, and then decreasing and monotonically increasing. However, the amount of oil captured by the oil scoop increases monotonically under all operating conditions. The effect of oil temperature on oil capture efficiency is mainly due to the change of dynamic viscosity of the oil. The oil capture efficiency can be improved by appropriately increasing the oil temperature within a certain temperature range.

赛车下润滑系统为高速轴承提供适量的机油，是确保其良好润滑和冷却的关键因素之一。为了研究油勺的捕油性能，建立了一个完整的数值计算模型，并进行了赛道下润滑系统内部油气两相流的非稳态模拟。结果表明，在不同喷油速度下，捕油效率随转速的增加先增大，然后减小。对应于最大集油效率的油勺的旋转雷诺数与喷油嘴的雷诺数之比随喷油嘴速度线性变化。随着喷油速度的增加，不同转速下的捕油效率存在三种变化趋势：单调递减，先递增，然后递减，然后单调递增。但是，在所有工作条件下，油勺捕获的油量都会单调增加。油温对捕油效率的影响主要是由于油的动态粘度的变化。通过在一定温度范围内适当提高油温，可以提高捕油效率。