摘要
通过室内水槽试验,本文对引客水(外引清水)破坏异重流的临界流速进行了探讨。在同一边界条件下,水槽试验所得K值与由动量方程推导客水临界流速与异重流速度比值K,基本一致。说明引客水破坏异重流状态的概化模式与实际情况符合,基本上反映了引客水破坏异重流的实质。 用葛洲坝三江下游引航道原型实测异重流的流速值,与水槽试验所得的平均K值相结合,估算了三江下游引航道在不同的水流泥沙边界条件下,破坏异重流所需的外引清水流量。
Through flume test in laboratory an approach is made to destroy critical velocity of density current by introducing external clear water. The ratio K of critical velocity of vip water to travelling velocity of density current obtained from flume test is basically the same as that derived from momentum equation under equal boundary conditions. It shows that the generalized model of destroying density current state by vip water accords with actual situation, basically reflecting the essence of the introduction.Using the prototype velocity values of density current obtained from approach channel of lower reach of the Third Channel and utilizing the average K values from flume tests, the volume of introduced clear water required for destroying density current at the mentioned channel under different flow, sediment and boundary conditions has been calculated.
出处
《长江科学院院报》
CSCD
北大核心
1991年第2期37-43,共7页
Journal of Changjiang River Scientific Research Institute
关键词
异重流
临界速度
淤积
speed of density current
average velocity of vip water
flow rate of vip water measured
