动态水压下迷宫流道水流运动特性研究

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	动态水压下迷宫流道水流运动特性研究
	郑超 1; 吴普特 1,2; 张林 1,2; 朱德兰 2; 陈昕 1,2; 陈俊英 2
刊名	Transactions of the Chinese Society for Agricultural Machinery(农业机械学报)
	2015-09-25
通讯作者邮箱	gizwpt@ vip． sina． com
卷号	46 期号:9 页码:167-172
关键词	动态水压(Dynamic water pressure) 迷宫流道 (Labyrinth channel) 水流运动特性(Flow characteristics) 粒子跟踪测速(Partical track velocimetry)
其他题名	Flow characteristics in labyrinth channel under dynamic water pressure
通讯作者	吴普特
中文摘要	采用粒子跟踪测速( PTV) 技术，通过观测动态水压及恒定水压下迷宫流道内示踪粒子的运动规律，分析动态水压下迷宫流道内水流的运动特性，揭示动态水压滴灌抗堵机理。结果表明: 相对于恒定水压，动态水压下流道内流量未出现明显下降，动态水压对滴灌系统的供水能力影响较小; 动态水压下流道主流区水流流速始终保持大幅度上下波动，水流紊动更加强烈，大量粒子可以快速经主流区通过流道，粒子在流道内停留时间大大缩短; 滞止区水流流速仍较低，但紊动强烈，进入滞止区的粒子随水流不断运动，不易发生沉积，部分粒子在水流紊动作用下能够迅速重返主流区，并最终通过流道，粒子在流道内沉积的概率明显降低。采用动态水压可以有效提高流道抗堵能力。
英文摘要	The movements of tracer particles in labyrinth channel under dynamic and constant water pressure were observed based on partical track velocimetry ( PTV) technique． Water flow characteristics in labyrinth channel were analyzed and the anti-clogging mechanism of drip irrigation system under dynamic water pressure was discussed． The results show that when comparing with constant water pressure， flow rate in the channel under dynamic water pressure did not decrease significantly．Therefore,the effect of dynamic water pressure on water delivery capacity of drip irrigation system was not obvious．While the flow velocity in channel’s main flow path fluctuated dramatically under dynamic water pressure supply system，and the turbulence was more intensely． Most particles could pass the main flow path quickly and the residence time of tracer particles reduced significantly． The flow velocity in the flow stagnation zone was relatively low while the turbulence remained strong． So the particles can hardly deposit in the flow stagnation zone due to the remarkably fluctuation． Meanwhile， some particles in the flow stagnation zone returned to the main flow path and finally flew out of the channel， which lead to the significant decreasing possibility of particle deposition in the channel． Therefore， dynamic water pressure could improve the anti-clogging performance of drip emitter effectively．
收录类别	EI
语种	中文
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7738]
专题	水土保持研究所_水保所科研产出（EI）_2015年EI
作者单位	1.西北农林科技大学水土保持研究所，陕西杨凌 712100 2.西北农林科技大学中国旱区节水农业研究院，陕西杨凌 712100
推荐引用方式 GB/T 7714	郑超,吴普特,张林,等. 动态水压下迷宫流道水流运动特性研究[J]. Transactions of the Chinese Society for Agricultural Machinery(农业机械学报),2015,46(9):167-172.
APA	郑超,吴普特,张林,朱德兰,陈昕,&陈俊英.(2015).动态水压下迷宫流道水流运动特性研究.Transactions of the Chinese Society for Agricultural Machinery(农业机械学报),46(9),167-172.
MLA	郑超,et al."动态水压下迷宫流道水流运动特性研究".Transactions of the Chinese Society for Agricultural Machinery(农业机械学报) 46.9(2015):167-172.