Physical Model Study of Flowerpot Discharge Outlet, Western Closure Complex, New Orleans, Louisiana.

摘要

The physical model investigation of the West Closure Complex (WCC) Pump Station evaluated flow leaving the 1740 cfs pumps through the flowerpot discharge outlet (FPDO). The model study evaluated stability of flow in the FPDO, head loss through the FPDO to use in pump head estimation, downstream riprap stability, and performance of keel coolers both inside the FPDO and downstream of the FPDO in the tailwater. The recommended Type 8 Design FPDO has a 14-in. wide rounded lip with its top located at elevation (el) 14, the chamber floor at el 11, and the roof at el 23. The diameter of the outlet at the top of the semicircular lip at el 14 was 169.5 in. Two 3-ft wide piers at the downstream end of the chamber were found to not have adverse effects on pump head or flow exiting the chamber. Pressures measured in the pump column and dye injections in the flowerpot section showed stable flow conditions in the vertical column above the pump. Water levels in the chamber were well below the roof and should allow air bulking of the flow without filling of the chamber.