Cryptosteady-flow thrust augmentation

Both the cross sectional shape of the rotor discharge nozzle and the graduality of the interpenetration of the interacting flows during cryptosteady flow induction are included in a wide-strip interaction model which can be extended to account for whatever mixing the interacting flows may undergo during pressure exchange. A relation is developed between the spin angle and the pressure exchange amplitude as represented by the compatibility parameter of the axial momentum equation. The effect of mixing after deflection and on that of the secondary-to-primary density ratio in constant-area interactions is discussed.