Discharge coefficient of pilot poppet valve at low Reynolds number

doi:10.1016/j.flowmeasinst.2022.102141

	Discharge coefficient of pilot poppet valve at low Reynolds number
	Min, Wei 1; Li, Cheng 1; Wang, Hongyu 1; Zheng, Zhi 1; Zhao, Jianfeng 2; Ji, Hong 1
刊名	Flow Measurement and Instrumentation
	2022-06-01
卷号	85
关键词	Flow fields Orifices Reynolds number Visualization Vortex flow Condition Cone angle Discharge coefficients Flow capacity Flow field structure Fluid-structure interaction Low Reynolds number Pilot poppet valve Poppet-valves Variations ranges
ISSN号	0955-5986
DOI	10.1016/j.flowmeasinst.2022.102141
英文摘要	The discharge coefficient (Cq) is an important parameter that affects the flow capacity of hydraulic valve. Many researches of Cq focused on main stage poppet (half cone angle is 30°–45°), weather the results are suitable for pilot stage poppet (half cone angle is 10°–15°) is still uncertain. In this paper, the discharge coefficient of different pilot stage poppet valves are measured, and Fluid-Structure Interaction is used to analyze the influence of the orifice submerged jet on the discharge coefficient, visualization experiment is used to study the flow field at the tail of the valve port under different poppet structures. The results show that the stability of the flow field structure at the front of the valve port and the end of the valve port has an important influence on the discharge coefficient, and Cq of the pilot poppet valve still can be written as Cq = mRe0.5 under the condition of low Reynolds number, however the proportional coefficient m been obviously smaller than poppet valve as main stage. In poppet valve with orifice, the m value of the Cq is between 0.04 and 0.05 of the flat-end poppet, and the variation range obviously smaller than ball-end poppet valve, the reason is that a stable annular vortex was formed at the flat-end poppet port front end, which made the pressure of the poppet surface insensitive to the flow change. While in poppet valve without orifice, the m value of the Cq is between 0.02 and 0.04 of the flat-end poppet, and the variation range obviously smaller than ball-end poppet valve, the reason is that the flow field presented various pattern at the ball-end poppet port back end, which drives the m value of the Cq under different working conditions fluctuate greatly. © 2022 Elsevier Ltd
WOS研究方向	Engineering ; Instruments & Instrumentation
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000784308000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158042]
专题	能源与动力工程学院外国语学院科学技术处（军民融合领导小组办公室）
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Foreign Language School, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Min, Wei,Li, Cheng,Wang, Hongyu,et al. Discharge coefficient of pilot poppet valve at low Reynolds number[J]. Flow Measurement and Instrumentation,2022,85.
APA	Min, Wei,Li, Cheng,Wang, Hongyu,Zheng, Zhi,Zhao, Jianfeng,&Ji, Hong.(2022).Discharge coefficient of pilot poppet valve at low Reynolds number.Flow Measurement and Instrumentation,85.
MLA	Min, Wei,et al."Discharge coefficient of pilot poppet valve at low Reynolds number".Flow Measurement and Instrumentation 85(2022).