Numerical study of cavitation flows in ultra-supercritical steam trap

作者：Li Shu Xun^*; Hu Jian Hua; Li Lian Cui; Xu Xiao Gang; Zhang Xing

来源：Journal of Sichuan University(Engineering Science Edition), 2013, 45(5): 145-153.

• Cavitation flow
• Cavitation model
• Inlet pressures
• Internal cavitation
• Near-wall
• Two phase flow model
• Ultra-supercritical
• Valve seats

Internal cavitation flow was numerically simulated in the ultra-supercritical steam trap by combining cavitation model and two-phase flow model and using the standard k-Ε model. The occurrence and development of internal cavitation in the valve were predicted and internal cavitation flow of the valve was studied under these conditions of different openings, different inlet pressures, different angles of sealing surface. Meanwhile, the anti-cavitation of the trap was studied. The results showed that the cavitation flow is well predicted. With the increase of opening the cavitation appears at the valve seat, developing gradually, finally a large number of cavitation form at valve bottom near wall. With the rise of inlet pressure, the cavitation intensify. When the angle of sealing surface becomes 45 degree, cavitation at the valve seat becomes lowest. Installing three-stage sleeve can restrain the occurrence and development of cavitation effectively.

• 出版日期2013
• 单位兰州大学