G051011 Discharge coefficient of throat tap type flow nozzle for high Reynolds number

Abstract

The discharge coefficients of throat tap nozzles of ASME PTC 6 with several tap diameters are experimentally investigated their behavior of the discharge coefficient for high Reynolds numbers from 1.8x10^5 to 1.4x10^7 using calibration facilities in NMIJ. Experimental results show that the discharge coefficients depend on the tap diameter normalized by the throat diameter and the deviation between the experimental results and the reference curve of PTC 6 is 0.75% at maximum.