| With the development of wind technology, wind turbines are widely used,the total installed capacity has been in a State of growing.Cold condition of the wind turbine blade surface can form ice cream or reduce the aerodynamic characteristics of wind machine,If icing severe also makes wind turbines are forced to shut down.So it will reduce the annual energy output of wind turbines,extremely prejudicial for wind power generation, so the wind used for anti-icing and deicing study is significant.This paper presents a new anti, de-icing method--film heating method, design research, in addition to anti ice on the straight bladed vertical axis wind turbine, gas film were observed by the surface of leaves to determine the degree of protection for wind turbine blades.Using numerical simulation method in this paper. First, on II dimension wind machine for numerical simulation research, through compared cylindrical hole, and expansion hole and scallop hole of gas film generated film situation and aerodynamic characteristics, determines gas film hole of optimal shape; Secondly, a numerical simulation is conducted on the three dimensional static blade, by comparing the different hole diameter and pitch film heating efficiency, to determine the size of the hole diameter and pitch; Thirdly, in accordance with the established good groove, hole diameter and spacing so as to determine the gas film holes on the blade of wind turbine, and on has hole of three dimensional rotating line wing vertical axis wind machine for variable workers condition research, Determine the optimal operating conditions. Finally, with and without film holes on aerodynamic characteristics of a straight-bladed vertical axis wind turbine for comparative analysis, discovery of two Airfoil wind energy utilization coefficient and torque coefficient almost identical. |
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