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Flow-induced vibration suppression method and structural parameter design of the seal with shunt injection
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Zhongxun CAO1, Zhiyong SHEN1, Fei WANG1, Xuefeng DONG1, Naidan ZHANG2, Wanfu ZHANG2
Thermal Power Generation | 2024, 53(3) : 137 - 145
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Thermal Power Generation | 2024, 53(3): 137-145
• Thermal energy science research •
Flow-induced vibration suppression method and structural parameter design of the seal with shunt injection
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Zhongxun CAO1, Zhiyong SHEN1, Fei WANG1, Xuefeng DONG1, Naidan ZHANG2, Wanfu ZHANG2
Affiliations
  • 1.China Energy Science and Technology Research Institute Co., Ltd., Nanjing 210046, China
  • 2.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Published: 2024-03-25 doi: 10.19666/j.rlfd.202308134
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Labyrinth seals are widely used in various types of turbomachinery due to their simple structure, convenient maintenance, and long service life. The shunt injection devices can reduce the flow-induced vibration caused by the spiral effect and improve the stability of the sealing system by affecting the circumferential flow inside the seal cavity. The three-dimensional numerical models of shunt injection labyrinth seal were established to calculate and analyze the impact of the shunt injection nozzle on the dynamic characteristics of the seal under different structural parameters. The results show that the smaller the tilt angle of the anti-swirl nozzle, the greater the system damping and stability. When the tilt angle is 30°, the effective damping is 4 times that of the vertical angle incident; the shape of the anti-swirl nozzle has a small impact on the sealing dynamic and flow characteristics. The cross stiffness of both nozzle hole types is negative, and the difference in cross stiffness between the two is about 5 kN/m at low frequencies and 1~2 kN/m at high frequencies; the more nozzles there are, the more they can suppress the circumferential flow of the rotor, which is beneficial for system stability.

shunt injection  /  labyrinth seal  /  dynamic characteristics  /  computational fluid dynamics
Zhongxun CAO, Zhiyong SHEN, Fei WANG, Xuefeng DONG, Naidan ZHANG, Wanfu ZHANG. Flow-induced vibration suppression method and structural parameter design of the seal with shunt injection[J]. Thermal Power Generation, 2024 , 53 (3) : 137 -145 . DOI: 10.19666/j.rlfd.202308134
Funding
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  • Science and Technology Project of National Energy Group Science and Technology Research Institute(WH2023Y02)
  • General Program of National Natural Science Foundation of China(51872361)
Appendix
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Year 2024 volume 53 Issue 3
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Article Info
doi: 10.19666/j.rlfd.202308134
  • Receive Date：2023-08-23
  • Online Date：2025-12-31
  • Published：2024-03-25
Article Data
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History
  • Received：2023-08-23
Funding
Science and Technology Project of National Energy Group Science and Technology Research Institute(WH2023Y02)
General Program of National Natural Science Foundation of China(51872361)
Affiliations
    1.China Energy Science and Technology Research Institute Co., Ltd., Nanjing 210046, China
    2.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202308134
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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