小间隙直通迷宫密封流场与泄漏特性数值模拟  

Simulation of small-gap straight-through labyrinth flow field and leakage characteristic value

作　　者：谭晓军[1] 

机构地区：[1]四川空分设备(集团)有限责任公司设备事业部

出　　处：《深冷技术》2014年第4期27-32,共6页

摘　　要：采用RNGκ—ε模型对小间隙(<0.1 mm)直通迷宫密封可压缩定常湍流场进行数值模拟,得到通道内的速度、温度等流场典型分布。通过改变密封间隙、齿深等,得出通道内最大马赫数及泄漏曲线趋势图。结果表明小间隙时直通迷宫密封内存在齿尖节流、空腔膨胀及射流偏转、复热等主要特征,而小间隙下增加齿深会降低泄漏量。The value simulation of small-gap （ 〈 0. 1 mm ） straight-through labyrinth compressible steady turbulence field with RNG κ-ε model obtains the typical distribution of velocity and temperature flow field in the passage. The change of seal gap and teeth depth obtains the maximum Mach number and leakage curve trend diagram in the passage. The results show that at small-gap the main characteristics exist in straight-through labyrinth such as tooth tip throttle, cavity expansion, jet deflection and re-heat, and the increase of tooth depth at small-gap will lower the leakage rate.

关 键 词：透平膨胀机 小间隙 直通迷宫密封 可压缩 流场 泄漏量 

分 类 号：TB653[一般工业技术—制冷工程]