Numerical Study on Mechanical Characteristics of Steam Turbine Valve Disc

Abstract:

The instability flow in the control valve often lead to abnormal vibration, the valve wear and the valve stem destruction, also lead to pressure loss. The flow in the control valve show complex flow regime distribution and variation, it is a typical unsteady flow. Therefore, it is necessary to theoretical calculation and qualitative analyses the flow field of valve by the numerical simulation method. In this paper, we study on the axial force of valve stem that caused by the fluid pulsation pressure. Establishing the flow field model of the control valve, generating the computational grid through the pre-processor, using the CFD software to do discretized and solved, getting visualization graphics of the internal flow field. Study the changes of the flow characteristics according to different pressure ratio, getting the variation characteristic of axial force. Provide the basis for subsequent optimization and design of the low vibration control valve.

• Periodical: Key Engineering Materials (Volume 572)
• Pages: 319-322
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.572.319
• Online since: September 2013
• Authors: Dong Yue Qu, Zhong Yuan Guo, Chong Liu
• Keywords: Computational Fluid Dynamics (CFD), Fluid Analysis, Large Eddy Simulation, Numerical Simulation

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