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Articles by Nazmi Izli
Total Records ( 4 ) for Nazmi Izli
  Esref Isik and Nazmi Izli
  The physical properties of sunflower seeds (Helianthus annuus L.) were determined as a function of moisture content in the range of 10.06-27.06% dry basis (d.b.). The average length, width and thickness were 7.79, 7.12 and 4.18 mm, at a moisture content of 10.06% d.b., respectively. In the above moisture range, the arithmetic and geometric mean diameters increased from 6.37 to 8.05 mm and from 6.15 to 7.93 mm, respectively, while the sphericity decreased from 0.789 to 0.835. In the moisture range from 10.06-27.06% d.b., studies on rewetted sunflower seeds showed that the thousand grain mass increased from 66 to 70 g, the true density from 885.00 to 902 kg m-3, the porosity from 53.06 to 54.93% and the terminal velocity from 4.07 to 4.57 m s-1. The bulk density decreased from 415.40 to 406.56 kg m-3 with an increase in the moisture content range of 10.06-27.06% d.b. The static coefficient of friction of sunflower seeds increased the linearly against surfaces of six structural materials, namely, rubber (0.55-0.65), aluminum (0.50-0.57), stainless steel (0.49-0.56), galvanized iron (0.53-0.59), glass (0.41-0.45) and MDF (medium density fiberboard) (0.43-0.48) as the moisture content increased from 10.06-27.06% d.b.
  Halil Unal , Esref Isik , Nazmi Izli and Yucel Tekin
  In this research, selected geometric and mechanical properties of mung bean grain were evaluated as a function of moisture content. Five levels of moisture content ranging from 7.28 to 17.77% d.b. (dry basis) were used. The average length, width, thickness, arithmetic and geometric mean diameters, sphericity, thousand grain mass and angle of repose ranged from 5.145 to 6.199 mm, 3.760 to 4.474 mm, 3.537 to 4.223 mm, 4.147 to 4.965 mm, 4.090 to 4.893 mm, 0.795 to 0.789, 52.3 to 64.6 g, and 25.87 to 29.38° as the moisture content increased from 7.28 to 17.77% d.b., respectively. The bulk density was found to be decreased from 821.3 to 745.2 kg/m3, whereas the grain volume, true density, porosity, terminal velocity, and projected area were found to be increased from 27.88 to 47.33 mm3, 1230.0 to 1456.7 kg/m3, 30.43 to 46.57%, 4.86 to 5.29 m/s, and 17.48 to 19.26 mm2, respectively. There is a 43% increase in surface area from grain moisture content of 7.28 to 17.77% d.b. The static coefficient of friction on various surfaces increased linearly with the increase in moisture content. The rubber as a surface for sliding offered the maximum friction followed by galvanised iron, medium density fibreboard, stainless steel, aluminium and glass sheet. As moisture content increased from 7.28 to 17.77%, the rupture forces values ranged from 67.39 to 39.44 N; 63.86 to 42.18 N, and 53.96 to 41.79 N for thickness (Z axis), length (Y-axis) and width (X-axis), respectively.
  Nazmi Izli , Ali Vardar and Ferhat Kurtulmus
  In this present study, fourteen different Re numbers, four different NACA profiles and lifting and drifting coefficients have been found by Snack 2.0 Computer program. By those determined values appropriate sliding rates of wind turbine blade profiles for each angle of attack have been calculated. For the determined four different NACA profiles correlations between the sliding numbers and the angle of attack, between the most convenient angle of attack and fourteen different Re number and lifting numbers and angle of attack have been revealed and depicted in a chart form. In addition, for the fourteen various Re numbers correlation between the lifting and drifting rates has been found out.
  Ferhat Kurtulmus , Ali Vardar and Nazmi Izli
  For thousands of years mankind is utilizing wind energy. Increasing world population and increasingly reducing oil reserves and resulting requirement for clean, reliable, renewable energy systems intensifies the requirement for wind energy in long term. Nowadays, wind turbines are used for transforming that energy into electrical and mechanical energy. In order to gain from a wind turbine economically in maximum amounts performance data based on blade cross-section characteristics must be found. In the present study angle of attacks for 4 various blade profiles, Re numbers and correlations between lift and drag rates are investigated. Snack 2.0, computer software has been used for the calculation of lift, drag, moment and minimum pressure coefficients. For all evaluated blade profiles and all Re rates in the provided highest sliding rates most convenient angle of attack was determined in the range of 3° and 9°. According to lift-drag correlation in constant drag value as long as Re rate is higher also lift is intensified. Highest drag rates found corresponding to Re 20000.
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