淹没出流泄洪洞通风井进气量试验研究
发布时间:2019-07-02 21:07
【摘要】:泄洪洞通风井进气量涉及水头、体型和流态变化,较难准确计算。通过模型试验和理论分析的手段,对高速淹没出流的短泄洪洞中闸室通风井的进气量Q_a进行了测试研究,结果表明:当上游库区水位H和通风井面积A_a一定时,随着泄洪洞闸门相对开度e的增加,通风井的进气量Q_a表现出先增加后减小的趋势,当闸门相对开度e=0.5时,Q_a出现最大值;通风井面积Aa增加,进气量Q_a略有减小,当通风井面积A_a增大至400%时,进气量Q_a仅减小不足20%。基于水跃理论推导出适用于计算高速淹没出流短泄洪洞通风井进气量的估算公式,计算结果与试验观测结果基本吻合。成果对类似工程的优化设计具有重要意义。
[Abstract]:The intake volume of air shaft in flood discharge tunnel involves the change of water head, shape and flow pattern, so it is difficult to calculate accurately. By means of model test and theoretical analysis, the intake volume Q 鈮,
本文编号:2509233
[Abstract]:The intake volume of air shaft in flood discharge tunnel involves the change of water head, shape and flow pattern, so it is difficult to calculate accurately. By means of model test and theoretical analysis, the intake volume Q 鈮,
本文编号:2509233
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