چكيده به لاتين
In this study, the effect of PM10 and PM2.5 dust particles with concentrations of 12, 60 and 120 micrograms per cubic meter and the effect of rainfall with rainfall rates of 1.5, 6 and 21 mm/hour on the performance of three airfoil geometries S814, S825 and S826 It was investigated for the root, middle and tip sections of the wind turbine blade using the discrete phase model, respectively. The pressure coefficient, the drag coefficient, the drag coefficient and the location of the flow separation were defined as dependent and output variables. For pressure and velocity coupling, the Phase Coupled SIMPLE method was selected by default. For the spatial discretization of pressure, PRESTO! left as default. For spatial discretization of momentum and volume fraction for solution stability, the First Order Upwind method remained unchanged. realizable k-epsilon turbulence model was selected for simulation. In the dust conditions, the highest increase in the drag coefficient was obtained in the root, middle and tip parts of the blade by 24.186, 21.816 and 19.835%, respectively. The highest amount of reduction of the bra coefficient was obtained in the root, middle and tip parts of the blade by 8.717, 6.261 and 4.000%, respectively. The maximum displacement of the flow separation location towards the attack edge was obtained in the root, middle and tip parts of the blade, respectively 13.111, 11.524 and 9.945%. In rainy conditions, the highest increase in the drag coefficient was obtained in the root, middle and tip parts of the blade by 27.363, 20.077 and 19.821%, respectively. The highest rate of reduction of the bra coefficient was obtained in the root, middle and tip parts of the blade by 13.369, 9.144 and 8.527%, respectively. The maximum displacement of the flow separation location towards the attack edge was obtained in the root, middle and tip parts of the blade, 15.991, 12.168 and 11.829%, respectively.
