摘要
根据微小尺度流动的特性,引入滑移边界条件,对干气密封进行了数值模拟,得到了比非滑移边界条件和假设流体为层流时更为精确的压力场分布。结果表明,干气密封压力最高的位置处于坝区的迎风面,气体在螺旋槽内的压力由外径向内径逐渐升高,其中在螺旋沟槽和密封坝之间的过渡区存在较大的压力降;滑移边界条件下的模拟结果具有良好的周期性,各个周期的过渡性也更加平滑,与实际情况更加接近。
According to the character of microflow,using the slip boundary condition to simulate the dry gas seal, pressure distribution was obtained, which is more precise than that simulated with laminar model and non - slip boundary. The result shows that the maximal pressure is at the upwind face, the pressure increases from outside radius to inside radius, the drop of pressure between groove region and land region changes quickly. The simulation has good period property, the transition hetween each period is more smooth and is more close to the real result.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第5期98-101,共4页
Lubrication Engineering
关键词
干气密封
滑移边界
压力场
dry gas seal
slip boundary
pressure field
