Cheng Heming

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Based on the Navier-Stokes equations and the standardk-ε turbulence model, this paper presents the derivation of the governing equations for the turbulent flow field in a draft tube. The mathematical model for the turbulent flow through a draft tube is set up when the boundary conditions, including the inlet boundary conditions, the outlet boundary(More)
To meet the needs of L-type large torque and high-speed planetary gear reducer, a test-bed is designed. During the period of working out, the scheme of hardware structures of the reducer test-bed is discussed, and then the close-type power flow test-bed is chosen. Finally, concrete ways of reducer positioning, power and loading device fixing, and the(More)
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