Dynamic Coefficient Analysis of Labyrinth Seal Based on FLUENT
Dynamic Coefficient Analysis of Labyrinth Seal Based on FLUENT
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发表时间：
2008
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通讯作者：
Zheng Shui-ying
中科院分区：
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作者：
Zheng Shui-ying
采用Fluent计算迷宫密封三维流场，提出了一种计算转子动力系数的新方法，研究了偏心距、入口切向速度、涡动速度等一系列因素对转子迷宫密封系统动力系数的影响。数值结果表明，入口切向速度是影响横向刚度的主要因素，入口切向速度越大，横向刚度越大。较大时，直接刚度和交叉阻尼变化较小，而交叉刚度和直接阻尼是非线性的。因此，交叉刚度和直接阻尼对转子的稳定性有重要影响。
Fluent was used in calculating three dimensional flow field of labyrinth seal.A new method of calculating the rotordynamic coefficient is put forward.Study the influences of a series of factors on dynamic coefficients of rotor labyrinth seal system,such as eccentricity,inlet tangential velocity,whirling velocity.The numerical results show that inlet tangential velocity is the main factor of cross stiffness,the bigger the inlet tangential velocity is,the lager the cross stiffness will be.As eccentricity becomes large,the direct stiffness and the cross damping change small while the cross stiffness and the direct damping are nonlinear.Thus the cross stiffness and the direct damping have the important effect on the stability of rotor.