Relationship between Sweep Leading Edges and the Flow Field Structure in Transonic Fans

An improved design method of transonic fan is presented. In order to control shock structure,migration of the low momentum fluid,and therefore to improve the performance of the transonic fan,the leading edges of sweep blades are considered as design freedoms in this method.Three high loaded transonic fans with low aspect ratio were used to prove the practicability of this method.The numerical study of the three transonic fans demonstrates the effect of the sweep leading edge on the flow field structure.