For abnormal leakage of liquid film seals in the aviation field caused by whirling conditions, considering factors such as seal dynamics, whirling characteristics, and radial relative motion of the faces, the influence of whirling conditions on the evolution of seal leakage and leakage characteristic values was analyzed by solving the dynamics equations and the Reynolds equation with the radial velocity effect. The results indicate that under synchronous whirling motions, an elliptical whirling motion only causes minor changes in the fluid film thickness and load-bearing capacity, but it leads to shear flow leakage at the sealing faces. As the long axis to short axis ratio of the whirling trajectory increases from 1, the shear flow leakage starts to increase significantly from 0 and then tends to a certain value. The radial shear flow effect under elliptical whirling conditions is a potential cause of abnormal leakage in liquid film seals.
Li et al. (Fri,) studied this question.