摘要
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。
We study the characteristics of droplet movement in a rotating disk cavity through analyzing a bear cham- ber~ topological structure. Firstly, we study the gas fluid dynamic characteristics of the droplet. Then, we use the Lagrangian model to establish the droplet motion model, taking into account gas resistance and droplet gravity. The numerical simulation of the droplet movement is performed with the instantaneous step method. The simulation re- suits show the influences of different droplet diameters and disk speeds on droplet velocity and droplet trajectory re, spectively are very great, that droplet gravity also has influence on droplet trajectory and that gas medium fluid has greater influence on the characteristics of movement of a smaller droplet.
出处
《机械科学与技术》
CSCD
北大核心
2013年第11期1699-1702,1707,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50975233)
航空科学基金项目(20100453004)资助
关键词
旋转圆盘腔
油滴运动特性
Lagrangian方法
computer simulation
drops
gravitation
lubricating oils
mathematical models
numerical methods
schematic diagrams
topology
trajectories
velocity
rotating disk cavity
droplet movement
dropletvelocity
droplet trajectory
lagrangian model
droplet gravity
