A computational methodology is proposed to predict the running clearance of a six-tooth straight-through rotating labyrinth seal numerically by taking into account both the centrifugal and thermal growths. Four different angular velocities ranging from 0 to 3000 rad/s are chosen to study the influence of rotation on the leakage flow rate. The detailed leakage flow fields and the structural deformations are presented. Further, different pressure ratios in the range of 1.1 to 2.5 have been investigated for a wide range of initial clearances. The methodology is validated against the available data in the literature. It is found out that there is a significant reduction in leakage flow rate by incorporating the radial growth for a particular operating condition. However, for a given initial clearance, the rotation has negligible effect on the reduction in the leakage flow rate, except at pressure ratios lower than 1.7. Further; the rotation has more prominent effect for smaller clearance values.
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机译：提出了一种计算方法，通过考虑离心和热的增长来预测六齿直通旋转迷宫式密封的游隙。选择4种不同的角速度，范围从0到3000 rad / s，以研究旋转对泄漏流量的影响。给出了详细的泄漏流场和结构变形。此外，对于宽范围的初始间隙，已经研究了在1.1至2.5范围内的不同压力比。该方法论已根据文献中的可用数据进行了验证。已经发现，通过结合针对特定操作条件的径向增长，泄漏流量显着降低。但是，对于给定的初始间隙，旋转对泄漏流量的降低影响可忽略不计，除非压力比低于1.7。进一步;对于较小的游隙值，旋转具有更显着的效果。
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