旋流排螺模型初步试验研究

发布时间：2018-02-09 02:08

  本文关键词： 水利血防 旋流排螺 模型试验 水流结构 排螺率　出处：《长江科学院院报》2015年01期 　论文类型：期刊论文

【摘要】：一些传统的水利血防措施(沉螺池、中层取水等)受多种条件的制约,工程效益难以充分发挥,研究新的水利血防措施势在必行。本研究借鉴旋流排沙的原理,研制了旋流排螺模型,并通过模型试验研究装置内的水流特性及排螺效果。结果表明:流量增大,流速以及紊动强度也随之增大;切向流速的径向分布中,靠近边壁的流速较大;在测流垂线上,切向流速分布中则以表层流速为最大;隔板对水流挤压使得在隔板边缘出现较大的轴向流速;模型内缘的径向流速比外缘径向流速更大。轴向紊动强度的分布为中上层大、底层小。在试验流量下,投入一定数量的钉螺,观测到模型排螺率达100%,表明旋流排螺技术是一种行之有效的排螺工程措施。
[Abstract]:Some traditional water conservancy and blood control measures (sinking-snail pond, middle water intake, etc.) are restricted by various conditions, so it is difficult to give full play to the engineering benefits, so it is imperative to study new water conservancy and blood control measures. In this paper, a spiral flow conch model has been developed, and the characteristics of flow and the effect of spiral flow in the device have been studied by model test. The results show that the velocity of flow and the intensity of turbulence increase with the increase of flow rate, and in the radial distribution of tangential velocity, The velocity near the side wall is larger, the tangential velocity distribution is the largest in the vertical line of flow measurement, and the axial velocity is larger at the edge of the diaphragm due to the compression of the water by the diaphragm. The radial velocity of the inner edge of the model is larger than that of the outer edge. The distribution of axial turbulence intensity is large in the upper layer and small in the bottom layer. The model snail rate is 100, which indicates that the swirl spiral conch arrangement technique is an effective method for snail conch arrangement engineering.
【作者单位】： 长江科学院河流研究所;
【基金】：长江水利委员会血防项目(CKSG2013136/HL)
【分类号】：TV149.2;R532.21

【参考文献】

中国期刊全文数据库 前3条

1 张威;熊正安;潘庆q，

本文编号：1496823