Research on the characteristic parameters and rotor layout principle of dual-rotor horizontal axis wind turbine

Yaru Yang, Hua Li, Jin Yao and Wenxiang Gao

Energy, 2019, vol. 189, issue C

Abstract: Based on the structural features of double rotor, three characteristic parameters nondimensionalized such as the mass of downwind rotor (DR) relative to upwind rotor (UR), the total length of blades of double rotor relative to single rotor, the external size of double rotor relative to single rotor are defined, the relationship between them and geometric parameters of double rotor is established. The wind field simulation of UR is implemented, of which the results are used to compute the wind energy of the torus where the DR blades is located and the values of characteristic parameters orderly. Meanwhile, the sensitivity analysis of characteristic parameters to geometric parameters is conducted. Thus, the relationship between the power ratio and geometric parameters on the characteristic parameters can be obtained. One is that with the increase of power ratio, the mass of DR relative to UR decreases slightly, the total length of blades of double rotor and the external size of double rotor relative to single rotor decrease distinctly. Another is that for the power ratio required, the radial position of DR blade root increases, the mass of DR relative to UR and the external size of double rotor relative to single rotor also increase, while another characteristic parameter decreases; also, with the enlargement of the length of DR blades, the total length of the blades of double rotor relative to single rotor increases, while the other two characteristic parameters diminish. The last one is that the axial position of DR has no significant influence on the three characteristic parameters. Based on these influence relationships, combined with the actual requirements, the layout principle of double rotor is given.

Keywords: Dual-rotor; Wind turbine; Geometric parameters; Characteristic parameters; Sensitivity analysis layout principle (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:189:y:2019:i:c:s0360544219319656

DOI: 10.1016/j.energy.2019.116270

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