Experiment and Numerical Analysis of Temperature Distribution of Hydraulic Valve Orifice Based on Embedded Miniature Thermocouple

doi:10.12141/j.issn.1000-565X.200610

	Experiment and Numerical Analysis of Temperature Distribution of Hydraulic Valve Orifice Based on Embedded Miniature Thermocouple
	Chen, Qianpeng; Ji, Hong; Zhao, Jing; Min, Wei; Zheng, Zhi
	2021-02-01
发表期刊	Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science)
ISSN	1000-565X
卷号	49 期号:2 页码:120-130
摘要	Viscous heating of valve orifice not only wastes energy but also causes thermal deformation. It increases the risk of spool clamping and exerts a strong impact on the stability and safety of hydraulic machines. A deep research on the temperature distribution of valve orifice is the foundation of accuracy prediction of thermal deformation, so a temperature measurement method was put forward by embedding miniature thermocouples in different locations of the planar valve orifice. The experiments were conducted with the valve opening x ranges from 1mm to 3mm and inlet pressure pin ranges from 0.5MPa to 3MPa. The results show that the valve orifice temperature rises with the increase of the inlet pressure; the heating rate can reach 0.79/min when x=2mm and pin=3.0MPa; the temperature of valve orifice caused by viscous heating distributes unevenly, and the temperature gradient seems more sensitive to pressure drop under a small orifice. The maximum temperature difference of valve orifice can reach 7.86 when x=1mm and pin=3.0MPa. In most cases, the sharp edge of the valve orifice is likely to gene-rate a higher temperature, which can reach 72.9 after heating 110min under 3.0MPa. However, a higher temperature will also appear along the vertical edge under a larger valve opening or a higher pressure drop. To analyze the phenomenon, a comprehensive analysis was carried out by combining fluid-solid-heat coupling module and mixture multiphase flow model in ANSYS Fluent software. The results show that the vortex and cavitation have a strong impact on the temperature distribution in the wall of the valve orifice. © 2021, Editorial Department, Journal of South China University of Technology. All right reserved.
关键词	Deformation Drops Heating Pressure drop Temperature distribution Temperature measurement Thermocouples Accuracy prediction Comprehensive analysis Hydraulic machines Maximum temperature differences Miniature thermocouples Multi-phase flow models Temperature measurement methods Thermal deformation
DOI	10.12141/j.issn.1000-565X.200610
收录类别	EI
语种	中文
出版者	South China University of Technology
EI入藏号	20211610215834
EI主题词	Orifices
EI分类号	641.1 Thermodynamics ; 944.5 Temperature Measuring Instruments ; 944.6 Temperature Measurements
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/148456
专题	能源与动力工程学院科学技术处（军民融合领导小组办公室）
作者单位	Energy and Power Engineering School, Gansu Hydraulic and Pneumatic Engineering Technology Research Center, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Chen, Qianpeng,Ji, Hong,Zhao, Jing,et al. Experiment and Numerical Analysis of Temperature Distribution of Hydraulic Valve Orifice Based on Embedded Miniature Thermocouple[J]. Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),2021,49(2):120-130.
APA	Chen, Qianpeng,Ji, Hong,Zhao, Jing,Min, Wei,&Zheng, Zhi.(2021).Experiment and Numerical Analysis of Temperature Distribution of Hydraulic Valve Orifice Based on Embedded Miniature Thermocouple.Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),49(2),120-130.
MLA	Chen, Qianpeng,et al."Experiment and Numerical Analysis of Temperature Distribution of Hydraulic Valve Orifice Based on Embedded Miniature Thermocouple".Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) 49.2(2021):120-130.