3-DIMENSIONAL FLOW IN A ROTOR - A STRICTLY 3-DIMENSIONAL CALCULATION OF FLOW IN TURBOMACHINES BY THE S1-S2 METHOD

Up to now, the use of the S1-S2 method has required the assumption of hypotheses which greatly limited the potential fields of application and the advantages of this method. The necessity of respecting these hypotheses is due to the fact that a model which does not respect them has an unsteady behavior. The authors propose a study of this unsteadiness and a technique that makes it possible to carry out to the S1-S2 coupling with only the local equations and the boundary conditions. The proposed model is strictly three-dimensional and takes into consideration all the phenomena which play an important role in the design of blade shapes.