Vortex specification and horizontal axis wind turbine design

Ntoko, Nzumbe-Mesape

doi:10.1080/01430750.2001.9674849

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2011

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“…(a) expressions for the interference factors and for the energy loss coefficient as well as an optimization procedure for the performance of an horizontalaxis wind turbine (HAWT) turbine blade ring [2]; (b) an enthalpy-entropy diagram of an HAWT blade ring [3]; (c) an expression for the optimum outlet relative flow angle of a blade ring [4].…”

Section: Introductionmentioning

confidence: 99%

Common theoretical basis for horizontal-axis wind and normal zero reaction gas turbines

Ntoko

2011

Proceedings of the Institution of Mechanical Engineers, Part A:

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A relationship is obtained between the performance parameters of a blade ring of an axial wind turbine and corresponding ones of a normal stage of a zero reaction axial gas turbine. This has been achieved by recognizing and using mean axial velocity as a common parameter for defining the characteristic specific speed for the two types of turbines. Then on the basis of a constant value of the axial interference factor of 1/3, expressions for wind turbine power coefficient, tangential interference factor, and the relative outlet flow angle are obtained.

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Section: Introductionmentioning

confidence: 99%