Leakage and rotordynamic performance of T type labyrinth seal
Leakage and rotordynamic performance of T type labyrinth seal
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DOI：
10.1016/j.ast.2019.02.043
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发表时间：
2019-05
影响因子：
5.6
通讯作者：
Jia Xingyun-;Q. Zheng;Yuting Jiang;Hai Zhang
中科院分区：
文献类型：
--
作者：
Jia Xingyun-;Q. Zheng;Yuting Jiang;Hai Zhang
提出了一种新型的密封结构--T型迷宫密封，以减小密封区域流动引起的激振力，从而降低航空发动机转子的振动。建立了全周计算模型，并在密封流场边界处定义了振动特征参数，以考虑转子振动的影响。对新型迷宫密封与交错式、直通式迷宫密封进行了沿着分析。T形齿对密封流场的洛马金效应增强，使密封内径向气动力大大增加。在轴向长度和叶顶间隙相同的情况下，T型密封的泄漏量比直通式迷宫密封小23.6-25.3%，比交错式迷宫密封大7.4-8.5%。
A new type of seal, called a T type labyrinth seal is proposed to reduce exciting force induced by seal region flow, thereby reducing rotor vibration in aero-engines. The whole circle computational model is performed, and the vibration characteristics parameters are defined at the boundary of the seal flow field to consider the effect of rotor vibration. The new type seal is analyzed along with the interlaced and straight through labyrinth seals. The enhanced Lomakin effect of seal flow field caused by the T-shaped tooth contributes to the great increase in the inward radial aerodynamic force. With the same axial length of the seal and the tip clearance, the leakage of T seal is approximately 23.6–25.3% less than the straight through labyrinth seal, and approximately 7.4–8.5% more than the interlaced labyrinth seal.