發(fā)布時間：2018-10-09 14:15

【摘要】：疏浚工程中常利用射流進行河道清淤和沖砂施工。為探究噴嘴間距對射流沖刷的影響,開展了一系列不同靶距、速度和間距的雙噴嘴沖刷粗砂、中砂砂床試驗,分析了沖刷坑形、沖坑深度和沖坑截面積的變化特性,得到了各工況下的最優(yōu)噴嘴間距L_B和不利噴嘴間距L_N。結(jié)果表明,對于同一粒徑砂床,改變靶距和速度沖刷時的L_B和L_N值變化較小,而與粗砂砂床相比,沖刷中砂砂床時的L_B和L_N值均有所增加。研究成果可供疏浚工程中射流系統(tǒng)設(shè)計作為參考。
[Abstract]:In dredging engineering, jet is often used to clear silt and wash sand. In order to investigate the influence of nozzle spacing on jet scour, a series of experiments on scouring coarse sand and sand bed with two nozzles with different target spacing, velocity and spacing were carried out, and the characteristics of scouring pit shape, depth and cross section of scour pit were analyzed. The optimal nozzle spacing LB and the unfavorable nozzle spacing L _ Ns are obtained. The results show that for the same sand bed with the same diameter, the LSP B and L _ S _ N values change slightly when the target distance and velocity are changed, but the LSP _ B and L _ S _ N values increase when the sand bed is scoured by the coarse sand bed. The research results can be used as a reference for the design of jet system in dredging engineering.
【作者單位】： 河海大學(xué)疏浚技術(shù)教育部工程研究中心;河海大學(xué)機電工程學(xué)院;
【基金】：中央高�；究蒲袠I(yè)務(wù)經(jīng)費項目(2013B10314)
【分類號】：TV851
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本文編號：2259646