In this paper, the fine/turbo software of NUMECA was used. Based on three-dimensional steady Reynolds averaged N-S equations, S-A turbulence model used to calculate relationship between tip clearance and diameter impeller, which were δ = 0.1%, 0.3%, 0.5% 0.7% respectively. The flows four water jet axial flow pumps with different clearances numerically studied at rates. results indicate that siz...

Variable speed, permanent magnet synchronous machines with hybrid excitation have attracted much attention due to their flux-control potential. In this paper, a design of axial flux iron poles in the rotor and an additional electrically controlled source fixed on stator is presented. This paper shows results pertaining air-gap control, electromagnetic losses, torque, back emf efficiency maps ob...

The CRB600H reinforcement is a new type of cold-rolled ribbed steel bar, which has the advantages green and low carbon, stable quality, saving precious metal resources so on. In order to study axial compression performance short concrete columns with stirrups, finite element analysis model high-strength reinforced stub was established by using ABAQUS, accuracy verified literature experiments. e...

Abstract The airfoil used in axial fan blades is one of the important factors that affect efficiency fan. In this paper, design process flow realized by FORTRAN language, and then traditional CAP2021 new high-performance CAP2021-Mod designed us are applied to fan, impellers two fans designed, results compared analyzed. Finally, CFD numerical simulation carried out, Aerodynamic performance field...