PREDICTION OF TURBULENT BOUNDARY LAYER PARAMETERS IN CONICAL DIFFUSER FLOWS.

The methods suggested by D. Ross and H. R. Fraser for dealing with turbulent boundary layers in adverse pressure gradients using semi-empirical data are extended to the prediction of boundary layer growth in conical diffusers, the new method making no recourse to measured static pressures as previously required. Predictions agree closely with published experimental data by Fraser and give some justification for the use of the Ross model for the turbulent boundary layer in a diffuser provided that the diffuser is not too long and that the inlet boundary layer is thin.