排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (1): 85-90    DOI: 10.3969/j.issn.1674-8530.2012.01.017
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二级洞塞泄流的消能特性分析
尹则高1,2, 朱慧洁2, 曹先伟2, 陈更2, 郑清鑫2
(1.中国海洋大学山东省海洋工程重点实验室, 山东 青岛 266100; 2.中国海洋大学工程学院, 山东 青岛 266100)
Analysis on discharge energy dissipation in twostage plugs
YIN Ze-Gao-1, 2 , ZHU Hui-Jie-2, CAO Xian-Wei-2, CHEN Geng-2, ZHENG Qing-Xin-2
(1.Key Laboratory of Ocean Engineering of Shandong Province, Ocean University of China, Qingdao, Shandong 266100, China; 2.College of Engineering, Ocean University of China, Qingdao, Shandong 266100, China)
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摘要 为了分析二级洞塞泄流的消能特性,揭示洞塞几何体形参数对洞塞泄流消能效果的影响规律,运用三维RNG k-ε紊流数学模型对洞塞泄流进行了数值模拟.建立了洞塞泄流的室内物理模型试验,利用模型试验结果对数学模型进行了验证,两者吻合较好.第1和第2级洞塞面积收缩比分别取为0.2,0.3,0.4和0.5,第1和第2级洞塞相对长度相等并分别取为0.5,1.5和3,形成144种工况.利用验证后的数学模型对上述144种工况进行计算和分析.结果表明:第1和第2级洞塞面积收缩比对消能率和消能比的影响较大,而相对长度对其影响很小.在其他几何体型参数一定的情况下,随着第2级洞塞面积收缩比的增大,第1级洞塞消能率和消能比相应增大,第2级洞塞消能率和消能比相应降低.在其他几何体型参数一定的情况下,随着第1级洞塞面积收缩比的增大,第1级洞塞消能率和消能比相应降低;第2级洞塞消能率变化不大,而消能比相应增加.当第1和第2级洞塞面积收缩比分别达到最小时,消能率达到最大.
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尹则高1
2
朱慧洁2
曹先伟2
陈更2
郑清鑫2
关键词二级洞塞   面积收缩比   相对长度   消能率   消能比     
Abstract: In order to analyze the discharge energy dissipation of a twostage plug and reveal the influence of its geometrical parameters on the dissipation,a threedimensional RNG k-ε turbulence model was adopted to study discharge in the plug.A physical model of the plug was established to validate the computational results,good agreement has been achieved.The area contraction ratios of both plugs are 0.2,0.3,0.4 and 0.5,respectively,the relative lengths of two plugs are equal to 0.5,1.5 and 3,respe ctively,causing 144 experimental cases.Then the verified mathematical model of energy dissipation was used to estimate the discharge energy loss in the twostage plugs at the 144 conditions.The results showed that the area contraction ratio influences the energy dissipation more significantly than the relative length.The energy dissipation rate and ratio of the first plug were increased,but those of the secondstage were decreased with increasing area contraction ratio of the second plug.The energy dissipation rate and ratio the first plug were decreased,the energy dissipation rate of second plug was varied little,but its energy dissipation ratio was increased with increasing area contraction ratio of the first plug.When the area contraction ratios of the two plugs were optimal,their energy dissipation rates were the largest.
Key wordstwostage plug   area contraction ratio   relative length   energy dissipation rate   energy dissipation ratio   
收稿日期: 2011-05-11; 出版日期: 2012-01-30
基金资助:

国家自然科学基金资助项目(51009123); 山东省自然科学基金资助项目(ZR2009FQ003)

通讯作者: 尹则高(1977—),男,山东青州人,副教授,博士(yinzegao@ouc.edu.cn),主要从事水工水动力学研究.   
作者简介: 朱慧洁(1989—),女,新疆巴州人,本科生(zhuhuijie163-com@163.com),主要从事水工水动力学研究.
引用本文:   
尹则高1,2,朱慧洁2等. 二级洞塞泄流的消能特性分析[J]. 排灌机械工程学报, 2012, 30(1): 85-90.
YIN Ze-Gao-1,2 ,ZHU Hui-Jie-2 et al. Analysis on discharge energy dissipation in twostage plugs[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(1): 85-90.
 
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