船闸中间渠道尺度对通航水流条件影响的研究

Study on influence from scale of ship lock intermediate channel on navigation flow condition

利用物理模型结合数学模型,研究船闸泄水进入中间渠道后,中间渠道内的水流条件与渠道尺度的关系。根据波动特性,对渠道内水体波动进行了定义。试验发现,船闸泄水正波在前进中波前逐渐变陡,到一定程度,波前水体形状将不再稳定,并形成短周期波。当中间渠道长度约等于泄水波长度一半时,船闸中间渠道振荡波最大。为改善水流条件,应调整输水时间、渠道水深等,以改变泄水波形状,或者直接改变渠道长度。

Based on physical model test combined with numerical calculation, the relationship between the scale and the flow condition of the ship lock intermediate channel after the discharge coming-in is systematically studied herein; in which the water level fluctuation in the channel is defined as well. It is found that the wave front gradient of the discharge is to be gradually in- creasing along its travelling, and the water in front of the wave is to be unstable to some extent and then create a series of short period waves. The value of the oscillatory wave in the channel is to be maximum, when the length of the intermediate channel is the half of that of the progressive wave. For improving the flow condition, the wave shape of the discharge must he changed with adjustment of the water filling time, water depth of the channel, etc. , or direct change of the channel.