排灌机械工程学报
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排灌机械工程学报  2009, Vol. 27 Issue (4): 232-236    DOI: 10.3969/j.issn.1674—8530.2009.04.007
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全射流喷头射流元件附壁频率
向清江, 袁寿其, 李红, 刘俊萍
(江苏省流体机械工程技术研究中心,江苏镇江212013)
Wall attachment frequency of complete fluidic sprinkler′s fluidic element
Xiang Qingjiang,Yuan Shouqi,Li Hong,Liu Junping
(Technical and Research Center of Fluid Machinery Engineering of Jiangsu,Zhenjiang,Jiangsu 212013,China)
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摘要 基于全射流喷头射流元件的工作原理和内部流动状况,分析射流元件附壁频率的影响因素.利用元件两侧压差大小,建立附壁频率计算式,通过射流元件壁面脉动压力测量获得的附壁频率试验数据,频率计算值与试验值符合较好.计算与试验结果表明,附壁频率随元件腔室容积增大,信号水导管长度的变长而减小,随喷头工作压力增大,信号水流量的增大而增大,对于PXH30全射流喷头射流元件,获得信号水流量与附壁频率的线性关系式.在无因次数计算与分析中,喷嘴雷诺数对斯特劳哈数影响较小,斯特劳哈数随欧拉数的增大而减小.附壁频率的研究能指导射流元件的设计和全射流喷头工作状态的调节.
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向清江
袁寿其
李红
刘俊萍
关键词全射流喷头   射流元件   附壁频率   附壁效应   脉动压力     
Abstract:  Based on the working principle of complete fluidic sprinkler′s fluidic element and its inner flow state,factors that affect the frequency of wall attachment offset jet are analyzed.A calculating formula of frequency is established by the differential pressures on both sides of fluidic element.The wall fluctuating pressures of fluidic element are measured and converted to the experimental data of wall attachment frequency.The calculating results of frequency agree well with the experimental data.Both the experimental data and the calculating results show that the frequency decreases with the signal pipe length and increases with the fluidic element′s cavity volume.The frequency increases with the sprinkler′s working pressure and the flow rate of signal water.As far as the type of PXH30 sprinkler is concerned,the wall attachment frequencies are linear with the flow rate of signal water.The Reynolds number has little influence on the Strouhal number,and the Strouhal number reduces with the Euler number increasing.The study provides the guide for the design of fluidic element and the adjustment of sprinkler′s working state.
Key wordscomplete fluidic sprinkler   fluidic element   wall attachment frequency   coanda effect   fluctuating pressure   
收稿日期: 2009-05-22; 出版日期: 2009-07-30
基金资助:

国家863计划项目(2006AA100211);江苏省自然基金资助项目(BK2007089)

通讯作者: 向清江(1974-),男,湖北宜都人,博士生(xiang_qj@163.com),主要从事流体机械射流技术研究.    
作者简介: 袁寿其(1963-),男,上海金山人,研究员,博导(shouqiy@ujs.edu.cn), 主要从事流体机械及工程研究.
引用本文:   
向清江, 袁寿其, 李红等. 全射流喷头射流元件附壁频率[J]. 排灌机械工程学报, 2009, 27(4): 232-236.
XIANG Qing-Jiang, Yuan-Shou-Qi, Li-Hong et al. Wall attachment frequency of complete fluidic sprinkler′s fluidic element[J]. Journal of Drainage and Irrigation Machinery Engin, 2009, 27(4): 232-236.
 
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