论文部分内容阅读
通过研究航空发动机环下供油轴承腔拓扑结构,建立了较为简化的拟轴承腔结构-旋转圆盘腔结构,并基于此进行了腔内油滴运动特性的研究。研究中首先获得了腔内气相介质流场特性,然后在考虑气相阻力、油滴自身重力对油滴运动特性的影响下,采用Lagrangian方法建立气相介质流场中油滴运动方程,获得了不同油滴直径以及圆盘转速变化对油滴运动过程中的速度和轨迹影响的规律。分析结果表明:不同圆盘转速对油滴运动过程中的速度和轨迹都有很大的影响;相同转速下直径较小油滴速度、轨迹的受到气相流场的影响比直径较大油滴所受影响更为显著。且油滴自身重力对不同直径下油滴的运动运动轨迹亦有影响。
By studying the topological structure of the bearing cavity under the aero-engine, a simpler quasi-bearing cavity structure-rotating disc cavity structure is established, and the movement characteristics of the droplet inside the cavity are studied. Firstly, the flow field characteristics of the gas-phase medium in the cavity were obtained. Then, the motion equations of the oil droplets in the gas-phase medium flow field were established by Lagrangian method under the influence of the gas phase resistance and the gravity of the oil droplets on the movement characteristics of the oil droplets. Diameter and disk speed changes on the speed and trajectory of oil droplets in the course of the law. The analysis results show that the rotational speeds of different disks have a great influence on the velocity and trajectory of the droplets during the movement of the droplets. Under the same rotational speed, the velocity and trajectory of droplets with smaller diameter are affected by the flow field of the gas phase Affected more significantly. And the droplet’s own gravity on the different diameters of oil droplets movement trajectory also has an impact.