PAN Hua-chen, ZHU Jia-le

(School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: Aiming at leakage of spiral sealing with an additional gland seal on gas, computational fluid dynamics(CFD) simulations of gas spiral sealing with an additional gland seal were conducted using the concept of porous media for modeling the gland seal,the model was established.The results indicate that the permeability of the gland seal decreases with increasing angle of spiral sealing, its groove depth and gap thickness if a given leakage condition is defined. When the angle, gap thickness and groove depth reach a certain range, spiral sealing effect is reduced, then the gland seal plays a dominant role in the whole sealing structure. The results are very helpful for researching and designing the spiral sealing with an additional gland seal.

Key words: gland seal; porous media; spiral seal; numerical simulation