Ship lock downstream entrance area navigation water flow condition prediction method and application thereof

Abstract

The invention discloses a ship lock downstream entrance area navigation water flow condition prediction method, and the method comprises the steps: calculating the water flow surface longitudinal and transverse flow velocity extreme values of the downstream entrance area of the ship lock through employing the following formula, and setting the longitudinal and transverse flow velocity extreme values of the entrance area as vymax and vxmax, wherein V represents the flow velocity of an incoming flow section; h represents the incoming flow section water depth; alpha represents an inflow angle, and the angle refers to an included angle between a river drainage center line and an entrance area navigation center line and is called as an inflow angle for short; and BE represents the width of the entrance area. The invention further discloses a ship lock downstream entrance area plane arrangement design and optimization method by applying the method. The navigation water flow condition of the downstream entrance area of the ship lock can be predicted, so that engineering designers can conveniently apply to entrance area design.

Description

technical field [0001] The invention relates to the technical field of hydraulics for navigable structures in water conservancy projects, in particular to a method for predicting navigable water flow conditions in a port area downstream of a ship lock and an application thereof. Background technique [0002] The gate area of ​​the approach channel downstream of the ship lock is at the junction of the flowing water of the river and the still water of the approach channel. It is the throat for ships passing the lock to enter and exit the approach channel. The sudden change in section width when exiting the gate makes the water flow curved and deformed, resulting in a flow velocity gradient and forming an oblique water flow, such as figure 1 shown. Under the action of oblique water flow, backflow and small separating eddies will be generated in the entrance area. When the ship sails through the waters, affected by the oblique current, backflow, etc., the ship will drift and t...

AI Technical Summary

Problems solved by technology

The existing research results have played an important supporting role in the layout design and normal operation of specific projects. However, due to the differences in the layout of different project hubs, river bank forms and navigable building layouts, it is difficult for the research results of existing projects to be directly used by other projects. not promotional

[0004] To sum up, in the structural design stage of the entrance area downstream of the ship lock, the navigable water flow conditions in the entrance area can only be studied by means of model tests in the laboratory, and there is no more general prediction method

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