New JSME standard S008 "performance Conversion Method for Hydraulic Turbines and Pump-Turbines"

Abstract

JSME Standard S008 "Performance Conversion Method for Hydraulic Turbines and Pump-Turbines" is now being revised and will be published in 2016. This new revision follows the main theory of previous version S008-1999. It enables us to convert the performance of each flow passage component of spiral case, stay vane, guide vane, runner and draft tube of model turbines and pump-turbines to that of prototypes with one-step calculation. The relevant values needed for the performance conversion, e.g. dimension factor, flow velocity factor, relative scalable loss of components δECO , etc. are newly organized as functions of specific speeds of turbines and pump-turbines using polynomial expressions. Additional data for high specific speed turbines are included. The resultant factors for conversion of the specific energy efficiency scale factor FE , the discharge efficiency scale factor FQ and the power efficiency scale factor FT are determined by considering friction coefficient ratio for prototype to the model.