本文選題：豎井旋流 + 壓坡出口�。� 參考：《水電能源科學(xué)》2017年06期

【摘要】：結(jié)合某超高水頭、大泄量豎井旋流泄洪洞的水工模型試驗(yàn),對(duì)豎井與導(dǎo)流洞銜接段體型進(jìn)行優(yōu)化研究,重點(diǎn)比較了不同銜接段體型豎井底板的脈動(dòng)壓強(qiáng)。試驗(yàn)表明,當(dāng)壓坡出口面積增大時(shí),水流紊動(dòng)程度增加,豎井底板所受的最大脈動(dòng)壓強(qiáng)增大,且豎井底板出現(xiàn)最大脈動(dòng)壓強(qiáng)的工況也發(fā)生改變;通過(guò)分析壓坡口面積與豎井底板所受最大脈動(dòng)壓強(qiáng)值之間的關(guān)系,引入了單位水體能量消耗量的概念,豎井水墊區(qū)單位水體需要消耗的能量越多,豎井底板所受的最大脈動(dòng)壓強(qiáng)就越大;加深消力井深度、沿長(zhǎng)壓坡長(zhǎng)度及改變壓坡孔口數(shù)量,均不能降低豎井底板所受的最大脈動(dòng)壓強(qiáng)。
[Abstract]:Combined with the hydraulic model test of a superhigh head and large discharge shaft swirling flood discharge tunnel, the shape optimization of the connection section between the shaft and the diversion tunnel is carried out, and the pulsating pressure of the bottom plate of the shaft with different shapes is compared. The test results show that when the pressure slope exit area increases, the turbulence degree of the flow increases, the maximum pulsating pressure on the bottom plate of the shaft increases, and the working condition of the maximum pulsating pressure on the bottom plate of the shaft also changes. By analyzing the relationship between the pressure groove area and the maximum pulsating pressure on the bottom plate of the shaft, the concept of energy consumption per unit water body is introduced. The more energy per unit water body needs to be consumed in the water cushion area of the shaft, the more energy is consumed in the unit water body. The greater the maximum pulsating pressure on the bottom plate of the shaft, the greater the depth of the stilling well, the length of the slope along the long pressure slope and the change of the number of hole holes in the shaft, all of which can not reduce the maximum pulsating pressure of the bottom plate of the shaft.
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【分類號(hào)】：TV135.2
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本文編號(hào)：1974018