كليدواژه :
Sluice Gate , Navigation lock , Filling and empty system , كشاورزي , روزنه , آب بندها , آبخيزداري , HYDRAULIC , هيدورليك , orifice , دريچه كشويي تحتاني , آب بندهاي كشتيراني
چكيده لاتين :
Filling of locks in low lifts, generally accomplish by slots in gates and energy of flow dissipates by stilling basin and buffles. In this new system gate has been designed in the form of box and openings are made in two, up stream (U/S) and down stream (D/S) walls and flow control is done by these gates. This system includes a few orifices in U/S and some under sluice in D/S. Some laboratory tests have been done for determining dishcarge coefficient (Cd). Results show that (Cd) for this system is different from (Cd) for orifices and sluice gates. Generally the latter (Cd) is lower than the former. This is due to difference in orifice edges and hydraulic loss between two walls. An equation has been developed in this research for multi dabble orifices.
