Spiral-Groove gas seals work by maintaining a narrow clearance between the rotating and stationary rings. The finited element method is used to solve Renolds equation of the gas.

分析了螺旋槽气体密封间隙内的气体运动并建立了雷诺方程，将用有限元素法对该方程求解所得的结果与有关文献中的结论进行了比较；

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The vent system composed of vent groove, vent plug and clearance of ejector pin can fit the need of venting.

采用分型面排气槽、顶杆间隙排气与排气塞排气相结合的排气系统设计能够很好地满足模具排气需要。

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There are flow separations at the front blade of bulge tip clearance. The high speed area of groove tip clearance increases the secondary flow loss dramatically.

凸型间隙在叶片前缘引起了流动分离，凹型间隙存在一高速区，增加了二次流损失。

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