Analysis of cavitation flow in conical throttle valve with different cone angle. Issue 13 (8th November 2018)

• Record Type: Journal Article
• Authors: He, Jie; Li, Beibei; Liu, Xiumei
• Is Part Of: Journal of engineering. Volume 2019:Issue 13(2019)
• Page Start: 163
• Page End: 167
• Publication Date: 2018-11-08
• Subjects: orifices (mechanical) -- valves -- numerical analysis -- cavitation -- computational fluid dynamics -- mechanical engineering computing; high‐speed camera -- different cone angle conditions -- cavitation process -- flow field physical parameters -- lowest pressure -- main area cavitation -- cone angle valve -- low pressure increases gradually also the highest velocity -- decreasing cone angle -- anti‐cavitation -- high‐performance hydraulic valves -- cavitation flow -- conical throttle valve -- common phenomenon -- industrial control valves -- strong influence -- internal flow -- two‐phase mixture model -- computational fluid dynamics software -- numerical model -- numerical results; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.9008
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : Cavitation is a common phenomenon in industrial control valves, which has a strong influence on the internal flow. Herein, characteristics of cavitation flow inside conical throttle valve have been numerically analysed using a two‐phase mixture model via computational fluid dynamics software firstly. The accuracy of the numerical model is proven by comparing the numerical results with the experimental data recorded by high‐speed camera. Then, the development of cavitation and the relationship between cavitation, pressure and velocity have also been discussed. The effects of cone angle on the flow and cavitation characteristics have been investigated in detail. The results reveal that under different cone angle conditions, cavitation process and flow field physical parameters are similar. The highest velocity and lowest pressure of the oil is located at the orifice, which is the main area cavitation occurs. Meanwhile, with decreasing cone angle valve, the range of low pressure increases gradually also the highest velocity. It is concluded from the results that the decreasing cone angle will be beneficial for the anti‐cavitation and anti‐erosion of throttle valve. The authors' conclusions could provide theoretical help for designing high‐performance hydraulic valves.