Inter-laboratory comparison of sonic nozzles at KRISS

KRISS has recently participated in two inter-laboratory comparisons of the discharge coefficients, C-d, for sonic nozzles. All laboratories involved i n these inter-laboratory comparisons have primary facilities, either volume or mass based systems, for calibration of nozzles. The first one is the No rth American inter-laboratory comparison of the NOVA 10-mm nozzle. The seco nd one is an inter-comparison of ISO 9300 toroidal throat nozzle package fr om Ford Motor C. The recent KRISS results of these tests will be reported, and recommendation will be made for future inter-laboratory comparisons. (C ) 2000 Published by Elsevier Science Ltd.