【摘要】：泄洪洞通風(fēng)井進(jìn)氣量涉及水頭、體型和流態(tài)變化,較難準(zhǔn)確計(jì)算。通過模型試驗(yàn)和理論分析的手段,對(duì)高速淹沒出流的短泄洪洞中閘室通風(fēng)井的進(jìn)氣量Q_a進(jìn)行了測(cè)試研究,結(jié)果表明:當(dāng)上游庫區(qū)水位H和通風(fēng)井面積A_a一定時(shí),隨著泄洪洞閘門相對(duì)開度e的增加,通風(fēng)井的進(jìn)氣量Q_a表現(xiàn)出先增加后減小的趨勢(shì),當(dāng)閘門相對(duì)開度e=0.5時(shí),Q_a出現(xiàn)最大值;通風(fēng)井面積Aa增加,進(jìn)氣量Q_a略有減小,當(dāng)通風(fēng)井面積A_a增大至400%時(shí),進(jìn)氣量Q_a僅減小不足20%。基于水躍理論推導(dǎo)出適用于計(jì)算高速淹沒出流短泄洪洞通風(fēng)井進(jìn)氣量的估算公式,計(jì)算結(jié)果與試驗(yàn)觀測(cè)結(jié)果基本吻合。成果對(duì)類似工程的優(yōu)化設(shè)計(jì)具有重要意義。
[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，

本文編號(hào)：2509233