發(fā)布時(shí)間：2018-07-02 22:53

  本文選題：弧形閘門 + 吸氣漩渦��； 參考：《水利水電技術(shù)》2017年11期

【摘要】：為研究弧形閘門局部開啟時(shí)引起閘門前發(fā)生的吸氣漩渦影響因素,取某泄洪閘的其中一孔為研究對(duì)象,采用比尺為1∶20的水工模型進(jìn)行了相關(guān)試驗(yàn)研究和理論分析。研究結(jié)果表明,閘前吸氣漩渦的產(chǎn)生與閘前水深、閘門開度、來(lái)流環(huán)量以及表面張力和黏性力有關(guān)。通過試驗(yàn)觀測(cè)和理論分析得到,閘前漩渦存在上、下兩個(gè)臨界淹沒水深。當(dāng)閘前水深在臨界淹沒水深上下限之間時(shí)有吸氣漩渦發(fā)生�；⌒伍l門局部開啟時(shí),開度越大,閘門進(jìn)水口的寬高比越小,吸氣漩渦越強(qiáng);來(lái)流的邊界條件引進(jìn)的環(huán)量作用越明顯,漩渦越強(qiáng);當(dāng)雷諾數(shù)Re≥4.4×10~4,韋伯?dāng)?shù)We≥(104~208)時(shí),可以忽略黏性力和表面張力對(duì)試驗(yàn)的影響。最后,通過理論分析建立了只考慮閘門進(jìn)水口的寬高比和環(huán)量數(shù)的臨界淹沒水深公式。
[Abstract]:In order to study the influence factors of suction vortex in front of the gate caused by the partial opening of an arc gate, a hydraulic model with a specific scale of 1:20 was used to carry out the relevant experimental study and theoretical analysis with one of the holes of a flood sluice as the research object. The results show that the generation of suction vortex in front of the sluice is related to the depth of water in front of the gate, the opening of the gate, the amount of the incoming flow ring, the surface tension and the viscosity force. Through experimental observation and theoretical analysis, it is found that there are two critical submerged water depths in front of sluice. When the water depth in front of the sluice is between the upper and lower limits of the critical submerged water depth, a suction vortex occurs. When the radial gate opens locally, the larger the opening degree is, the smaller the ratio of width to height of the gate inlet is, and the stronger the suction swirl is, the more obvious the effect of the ring quantity introduced by the boundary condition of the incoming flow is, the stronger the swirl is, when re 鈮，

本文編號(hào)：2091211