Generic Properties of Flows in Low-Speed Axial Fans Operating at Load-Controlled Windmill

Vortex Shedding Mechanisms in Relation to Tip Clearance Flows and Losses in Axial Fans

SUMMARY This paper outlines the importance of tip leakage flows in axial fans as a source of loss and relates the dimensionless loss analytically to a range of dimensionless parameters by application of a jet loss theory due to Rains. Improved vortex shedding models are also presented. From these models theoretical predictions of lift coefficient reduction are compared with published experiment...

A Procedure for Design of the Axial Flow Fans

Properties of Low-alloy High-speed Steel at Elevated Temperature

J. Jaworski, T. Trzepieciński: Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Rzeszów, Poland This paper presents the results of research on the determination of the coefficient of thermal conductivity and hot hardness of cutters made of selected grades of low-alloy high-speed steels, HS 6-5-2 and HS3-1-2. The investigations of hot hardness and yield stress...

A Procedure for Design of the Axial Flow Fans

Preconditioning Methods for Low-Speed Flows

We consider the steady-state equations for a compressible uid. For low-speed ow, the system is sti because the ratio of the convective speed to the speed of sound is quite small. To overcome this di culty, we alter the time evolution of the equations but retain the same steady-state analytic equations. To achieve high numerical resolution, we also alter the arti cial viscosity of the numerical ...