Fundamental Studies in the Performance and Design of Face Seals with Two Phase Flow

本项目研究的是可能发生相变的条件下的端面密封性能。该计划主要是理论上的，但广泛使用了现有的数据、工业经验和NASA Lewis正在进行的实验，该项目将开发更完整和准确的分析模型，用于端面密封的稳态和暂态行为，以及在各种实际操作条件下的稳定性分析。目前，高压泵和旋转机械的工业设计正朝着密封间隙肯定会出现两相状态的方向发展，例如高压水泵和低温液体泵。此外，在非常简单的普通操作密封中，通常存在两相状态，并且可能主导密封的行为和性能。透彻的理解对于在这样的条件下进行适当的设计是必不可少的。

This project is concerned with face seal performance under conditions where a phase change may take place. The program is primarily theoretical, but extensive use is made of existing data, industrial experience and ongoing experiments at NASA Lewis, This project will develop more complete and accurate analytical models for steady and transient behavior of face seals and for their stability analyses under a wide variety of practical operating conditions. Current industrial design of high pressure pumps and rotating machinery is moving in a direction where two-phase conditions are definitely occurring in the seal gap as examples, high pressure water pumps and cryogenic liquid pumps. Moreover, in very simple common operating seals the two-phase condition is often present and may dominate the behavior and performance of the seal. A thorough understanding is essential for proper design under such conditions.