An innovated waterjet concept led to a milestone in impeller design
field. Yet, incompatibilities issues with numerical model brought
designer to give up. Present work solves these issues and leads up to a
new original design method. Impeller preliminary design procedure and it
numerical model are first surveyed. A careful appraisal of logical
frameworks underlying both models reveals key inconsistencies. As far as
theoretical model is concerned, self-contradictions between main
assumptions are found. These shortcomings are also remarked through
numerical model results scrutiny. Further, a major lack in numerical
model settings is recognized. Both models are then improved. Classic
design method is refined with diffuser conservation principles and
aeronautics expertise implementation. Results are then exploited to
revise numerical model settings. Thus, an impeller redesign is achieved
and results obtained are discussed. Finally, these are compared with
initial ones. Significant improvements as concern models
representativeness are achieved. An innovative design procedure well
suited for a performing waterjet is thus outlined.