FFESTINIOG PUMPED STORAGE PROJECT REPORT OF HYDRAULIC MODEL INVESTIGATIONS Part Three A Study of Flow Conditions through the Lower Bend and Bifurcation

摘要

This report describes the third part of the model tests carried out in the laboratory of the British Hydromechanics Research Association at Harlow, Essex, to study the hydraulic design of the Stwlan intakes, the upper bend and the bend and bifurcation at the lower end of the vertical pressure shaft. The water model tests to study the possibility of the formation of air-entraining vortices at the Stwlan intakes, and the air model tests to study the flow distribution and head losses in the intake and upper bend, are described in parts one (RR 570) and two (RR 589)respectively. The purpose of this part of the investigation was to study the flow distribution and head losses in the lower bend and bifurcation.