| HOU Xin-zheng 1，3 ， ZHANG Xing-yuan 2 ， TIAN Jin-hu 3 ， ZHANG Wen-liang 2 ， MIN Hao 3 ， AI Yan-ting 2.Numerical Simulation of the Influence of Labyrinth Seal Structure on Sealing Characteristics of The SlipJoint Between the Moving and Fixed Element of Altitude Test Facility[J].航空发动机,2024,50(5):133-138 |
| Numerical Simulation of the Influence of Labyrinth Seal Structure on Sealing Characteristics of The SlipJoint Between the Moving and Fixed Element of Altitude Test Facility |
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| Key Words:simulation altitude test facility labyrinth seal structural parameters leakage rate sealing characteristics aeroengine |
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| Abstract:A traditional labyrinth seal structure was adopted for the slip Joint between the moving and fixed element of an aeroengine
altitude test facility, where significant gas leakage and flow metering device icing were found during tests. To improve the accuracy and
safety of the altitude simulation tests, theoretical analyses and numerical simulations were carried out to study the sealing mechanism of the
new labyrinth seal structure of the slip Joint, the influential laws of the structural parameters such as seal clearance, chamber depth-width
ratio, and the number of fins on the sealing characteristics of the new labyrinth seal structure were obtained. The results show that with the
decrease of labyrinth seal clearance, changing of the control port pressure ratio results in a slower change of the leakage rate; the chamber
depth-width ratio barely affects the change trend of the leakage rate at the mainstream inlet; with the increase of the number fins, the leak?
age rate decreases. It provides a theoretical basis for the structural design and leakage rate analysis for the labyrinth seal structure of the
slip Joint of altitude test facilities. |
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