Performance prediction of nozzles In general,open propeller performance is based on model scale experiments. o Full scale performance is based on measured data in combination with scaling methods(ITTC'78) Scaling of ducted propellers(=propeller nozzle configuration)not well understood New nozzle designs,like Lips HR-nozzle,do not behave like old 19A nozzles. Advanced numerical method(CFD)is applied to predict full scale performance of propeller with HR-nozzle ©Wartsila WARTSILA© Wärtsilä 8 Performance prediction of nozzles
In general, open propeller performance is based on model scale experiments.
Full scale performance is based on measured data in combination with scaling methods (ITTC’78)
Scaling of ducted propellers (=propeller + nozzle configuration) not well understood
New nozzle designs, like Lips HR-nozzle, do not behave like old 19A nozzles.
Advanced numerical method (CFD) is applied to predict full scale performance of propeller with HR-nozzle