排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (4): 422-427    DOI: 10.3969/j.issn.1674-8530.2012.04.010
泵理论与技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
脉冲液-气射流泵能量平衡
张晋华1, 高传昌1, 闫勇2, 王小卉2
(1. 华北水利水电学院电力学院, 河南 郑州 450011; 2. 上海勘测设计研究院重庆分院, 重庆 400039)
Energy balance of pulse liquid-gas jet pump
 ZHANG  Jin-Hua-1, GAO  Chuan-Chang-1, YAN  Yong-2, WANG  Xiao-Hui-2
(1. Institute of Electric Power, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, Henan 450011, China; 2. Chongqing Branch, Shanghai Investigation, Design & Research Institute, Chongqing 400039, China)
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摘要 应用能量平衡分析方法,得到脉冲液-气射流泵内能量损失的压力比表达式,分析其传能及传质的机理和主要影响因素,研究了主要流动部件的能量损失变化对脉冲液-气射流泵性能的影响,并进行了相应的试验研究和数值研究.研究可知最优面积比的液-气射流泵应是在较大的流量比区间具有较好的压力比,通过5个面积比的试验得到最优面积比为4.34.研究结果表明:主要流动部件的能量损失的理论分析与试验结果基本一致;计算了主要流动部件的能量损失压力比,分析其与面积比和流量比的关系;脉冲射流频率、射流泵的面积比、流量比和射流泵喉管长度是影响射流泵能量平衡和液-气射流泵能量特性的主要因素.通过各面积比下,脉冲与恒定液-气射流泵能量损失压力比、性能、效率的试验数据进行对比研究,验证了脉冲射流是提高液-气射流泵效率的有效途径.
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张晋华
高传昌
闫勇
王小卉
关键词射流泵   水力机械   脉冲液-气射流泵   能量平衡   脉冲射流     
Abstract: An analytical expression of energy loss to pressure ratio in the pulse liquidgas jet pump was deduced by using the energy conservation principle and the chef factors influencing the energy conversion of flow were clarified. The effects of energy losses in major flow components on the pump performance were studied, and then were confirmed by experiments and numerical simulations. The optimum area ratio (the throat area over jet area) is 4.34, at which the pump exhibits a higher pressure ratio over a large range of flow rate ratios, based on the experiments made on the pumps with five different arearatios. The results showed that the energy losses in the major flow components estimated theoretically are basically in agreement with the measurements. The energy loss ratios in the flow components were calculated, and their relations with area ratio and flow rate ratio were analyzed. The major parameters affecting the energy balance and performance of a liquidgas jet pump included the frequency of pulse jet, area ratio, flow rate ratio and throat length. By comparing the experimental data of the pump driven by a pulse jet with those driven by a steady jet at various area ratios, it was verified that using pulse jet is an effective way to improve the liquidgas jet pump efficiency.
Key wordsjet pump   hydraulic machinery   pulse liquidgas jet pump   energy balance   pulse jet   
收稿日期: 2012-03-27; 出版日期: 2012-07-30
基金资助:

 国家自然科学基金资助项目(50379013); 水利部公益性行业科研专项经费资助项目(201201085)

通讯作者: 张晋华(1980—),女,河南浚县人,讲师,博士(zhangjh@ncwu.edu.cn),主要从事水利水电工程研究.   
作者简介: 高传昌(1957—),男,河北邯郸人,教授(gcc@ncwu.edu.cn),主要从事流体机械及工程研究.
引用本文:   
张晋华,高传昌,闫勇等. 脉冲液-气射流泵能量平衡[J]. 排灌机械工程学报, 2012, 30(4): 422-427.
Zhang-Jin-Hua,GAO Chuan-Chang,YAN Yong et al. Energy balance of pulse liquid-gas jet pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(4): 422-427.
 
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