Abstract: The streamline secondary vorticities in blade passages were simulated numerically by Euler equations for the first time.The effects of the vorticities on outlet flow angles have also been predicted.The calculated results show that the vorticities can be simulated by the method and the difference between predicted and experimental deviation angles of outlet flow is relatively small in the region far from the end walls. The method can be used to roughly analyse the secondary flows in blade passages.

Key words: Euler equation of motion, secondary flow, cascade flow, computerized simulation