Research on the Optimal Design of a Pilot Valve Controlling Cut-Off Valve

Abstract:

The cut-off valve based on pilot valve controlling is a new kind of valve which opens and closes fast and has low driving energy consumption. Because of the complexity of the internal flow and uncertainty of the internal pressure, there is uncertainty in the design of the key structure. We simulate the whole opening process of the valve under different key structural dimensions with Fluent Dynamic Mesh and UDFs, and we do experiments to authenticate simulation results. The turn-on time we get from the simulation is the same as that from experiments under the valves actual operating conditions, in other words, the simulation results are correct, so we can identify the valve flow and get the internal pressure data which provides a reliable basis for the design of the key structural dimensions.

• Periodical: Applied Mechanics and Materials (Volume 331)
• Pages: 65-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.331.65
• Online since: July 2013
• Authors: Jin Yuan Qian, Han Zhang, Jian Kai Wang, An Le Lu, Zhi Jiang Jin
• Keywords: Cut-Off Valve, Dynamic Numerical Simulation, Pilot Valve, Structure Optimization

References

[1] Jin Zhi-jiang, Kuang Ji-yong, Chinese Patent: ZL200820164064.5. (2009)

[2] Ferrari J., Leutwyler Z.: Fluid flow force measurement under various cavitation state on a globe valve model. Pressure Vessel and Piping Division of The ASME. (2009) 157-165.

DOI: 10.1115/pvp2008-61238

[3] James A. Davis, Mike Stewart: Predicting globe control valve performance - Part 1: CFD Modeling. Journal of Fluids Engineering -Transactions of The ASME, 124 (2002) 772-777.

DOI: 10.1115/1.1490108

[4] James A. Davis, Mike Stewart: Predicting globe control valve performance - Part II: Experimental verification. Journal of Fluids Engineering-Transactions of The ASME, 124(2002) 778-783.

DOI: 10.1115/1.1490126

[5] Taik-Dong Cho, Sang-Min Yang et al: A study on the force balance of an unbalanced globe valve. Journal of Mechanical Science and Technology, 21(2007) 814-820.

DOI: 10.1007/bf02916360

[6] Wang Fu-jun: Analysis of computational fluid dynamics, Tsinghua University Press, 2004.

[7] Srikanth, C., Bhasker, C.: Flow analysis in valve with moving grids through CFD techniques. Advances in Software Engineering, 40 (2009) 193-201.

DOI: 10.1016/j.advengsoft.2008.04.003

[8] Yuan Xin-ming, He Zhi-guo, Mao Gen-hai: Numerical Simulation of a Turbulence Flow in the Cut-off Valve by RNG kappa-epsilon Turbulence Model. Fluid Mechanics, 34(2006) 34-38.