Yuan Chen

TL;DR: In this paper, experimental studies on transient state film thickness and leakage rate of a spiral groove dry gas seal at high-speeds are carried out under different spring pressures and different spiral groove depths.

TL;DR: In this paper, a series of bionic grooves based on bird wing, such as cluster spiral groove, multi-array spiral groove and flow-split spiral groove are introduced to improve the film stiffness and sealing properties of dry gas seal.

TL;DR: In this paper, a dynamic wedge-shaped gap with a fixed angle between seal faces will form under the influence of angular excitation, and it has a significant impact on transient behaviors of the dry gas seals.

TL;DR: In this article, a new type of bionic cluster spiral groove DGS (CS-DGS) is proved to have superior film stability than SDS at the condition of high-speed and low-pressure numerically, and the film stiffness and stiffness-leakage ratio of these two face seals are derived by the relationship between closing force and film thickness at the steady state.

TL;DR: In this article, a generalized geometric model based on triangles is proposed to characterize spiral grooves, and the film stiffness of dry gas seal must be sufficient to keep gas film stable at high and low speed.