Abstract: The elevation of a hydroelectric turbine above or below tailwater is based on hydraulic model studies to determine the critical sigma, defined as the ratio of barometric pressure plus submergence depth at which cavitation ...

Abstract: This paper is based on an analysis of turbine cavitation data obtained from 729 turbines installed in the United States since 1950 and 19 selected Canadian turbines. An equation has been developed to express the anticipated ...

Abstract: The finite element method is utilized to obtain the elasto-plastic stress and strain fields in a perforated plate made of a work-hardening material. The perforated plate contains penetrations ...

Abstract: The local deformations at the built-in end of a beam or plate re-entrant corner have considerable influence upon the redundant forces and moments at the juncture, and hence, upon the stresses. ...

Abstract: Tropical rivers often transport a heavy bed load and have a high silt content, and their surface waters carry leaves, twigs, and an occasional tree or branch. Extracting reasonably clean water for a high head power plant ...

Abstract: When the head on a hydroelectric powerplant is between about 250–700 m (800–2,300 ft) the turbine can be either an impulse or reaction Francis unit. For each type of unit the operating characteristics and design of the ...

Abstract: This paper describes use of equivalent solid (EQS) modeling to obtain efficient solutions to perforated material problems using three-dimensional finite element analysis (3-D-FEA) programs. It is ...