Numerical Simulation And Research Of Horizontal Axis Wind Turbine Blade Film Heating

With the development of today's society, more and more wind pattern formed in the north is cold or high altitude, when faced with freezing rain and snow, wind turbine blade paddle will be covered with ice, affect the wind turbine aerodynamic resistance. Currently, there is no mature technology is suitable for wind turbine blade paddle, melting phenomenon. For wind turbine blade is icy, generally take down processing, it has affected the normal operation of power grid system and lasting use, therefore, can effectively prevent freezing problems of fan blade, is of great significance for wind turbine generator.In this paper, combining with the results of gas turbine film cooling, propose a resistant, melting ice function of wind turbine blade paddle. This article main research results:(1)Through the study of the ice numerical simulation of two-dimensional airfoil, found that when the Angle of attack is not at the same time, the supercooled water droplets in the airfoil ice front position is also different, mainly by the wind attack Angle limits; (2) The preliminary understanding holes through flat three-dimensional simulation using in-line arrangement, small hole near the distribution of flow field and gas membrane heating efficiency; (3) Through the small hole is arranged in a different way, and found fork row layout is larger than in-line arrangement coverage, avoid heating dead zone exists, as to provide theoretical basis for improving front temperature distribution; (4) Through to the blade leading edge three rows of holes are numerically simulated, the results showed that on the suction surface and pressure surface can form gas film covering and leading edge, and Angle of attack for the second exhaust film hole jet flow direction has a great influence; (5) The gas film heating efficiency of eta, as the jet gas film distance export with holes distance increased, the heating efficiency of the overall trend of decrease; (6) Through the stress analysis and modal analysis, found holes on the whole structure and strength of the fan blades, stress and deformation have an impact, but the impact is not big, do not make the influence of the structure resonance.