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

本项目关注的是可能发生相变条件下的端面密封性能。该计划主要是理论上的，但广泛使用了现有数据，工业经验和正在进行的实验，本项目将为端面密封的稳态和瞬态特性及其在各种实际操作条件下的稳定性分析开发更完整、更准确的分析模型。目前高压泵和旋转机械的工业设计正朝着密封间隙中肯定会出现两相条件的方向发展，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，经常存在两相状态，并且可能支配密封的行为和性能。在这种情况下，彻底的了解是正确设计的必要条件。

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.