Hydraulic Characteristics of UGT Gate, Circular High-pressure Slide Gate for Pipe Conduit
1992 年 1992 巻 23 号 p. 23-38
詳細
1992 年 1992 巻 23 号 p. 23-38
In order to maintain dam safety and to control waterdischarge, a dam is equipped with outlet facilities involving control gates. Butthese gates inevitably cause vibration and/or cavitation in most cases, especiallyin cases of partial opening.
In view of this, the following innovations for a slide gate have beenintroduced, as a result of numerous hydraulic model tests and theoreticalstudies.
(1) The gate lip is shaped so as to coincide with the Vena Contracted Curve ofthe orifice, obtained by means of a two-dimensional hydraulic model test.
(2)The gate sealing used is composed of plastic resin and stainless steel so asto give anti-abrasion resistance against sand contained water, flowing athigh velocity.
Thus, a new type of high-pressure slide gate, the UGT Gate, has beendeveloped to be applied to a straight circular pipe conduit without any transitionalsection.
The gate can be used in conditions of partial opening including minimalgate opening, and the problems of gate vibration have also been resolved.
