张立新1,艾万政2.突缩突扩式管道消能工能量损失特性研究[J].水电能源科学,2018,36(10):117-119
突缩突扩式管道消能工能量损失特性研究
Research on Energy Dissipation Characteristics of Sudden Reduction and Sudden Enlargement Energy Dissipater
  
DOI:
中文关键词:  突缩  突扩  消能  能量损失系数  孔径比
英文关键词:sudden reduction  sudden enlargement  energy dissipation  energy loss coefficient  contraction ratio
基金项目:宁夏回族自治区重点研发计划项目(2016KJHM126);宁夏高等学校科学研究项目(NGY2016166,NGY2018 241);北方民族大学校级重点科研项目(2015KJ12);宁夏回族自治区高等教育教学改革项目(NXJG2016058)
作者单位
张立新1,艾万政2 1. 北方民族大学 土木工程学院 宁夏 银川 750021 2. 银川能源学院 土木建筑学院 宁夏 银川 750105 
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中文摘要:
      为明确突缩突扩式消能工能量损失系数与相关影响因素之间的关系,通过数值模拟试验,分析了孔径比、厚径比、雷诺数等因素对能量损失系数的影响。结果表明,孔径比越小,能量损失系数越大;当孔径比超过0.7时,孔径比对能量损失系数的影响不再明显;能量损失系数随厚径比的增大而减小,但当厚径比超过0.5时,能量损失系数随厚径比的增大而减小的趋势变得不明显;当雷诺数大于105时,雷诺数对能量损失系数的影响可忽略。
英文摘要:
      In order to clarify the relationship between energy loss coefficient of sudden reduction and sudden enlargement energy dissipater and influencing factors, the impacts of contraction ratio, ratio between energy dissipater thickness and discharge tunnel's diameter, Reynolds number on energy loss coefficient were analyzed by numerical simulation test. The results show that energy loss coefficient increases with contraction ratio decreases; when contraction ratio is greater than 0.7, its impacts on energy loss coefficient are not obvious; energy loss coefficient decreases with the increase of ratio between energy dissipater's thickness and discharge tunnel diameter; when the ratio between energy dissipater's thickness and discharge tunnel diameter is greater than 0.5, its impacts on energy loss coefficient are not obvious; when Reynolds number is greater than 105, its impact on energy loss coefficient can be ignored.
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