Numerical solution of hovering propeller performance at various blade pitch angles and revolutions with different turbulence models
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
Behrooz Shahriari
1
(Faculty of Mechanics, Malek Ashtar University of Technology, Isfahan, Iran)
Mohammad Reza Hashemi
2
(Mechanical Engineering, University of Birjand, Birjand, Iran)
الکلمات المفتاحية: Shock Wave, Propeller, Blade pitch angle, Turbulence model, Hover,
ملخص المقالة :
In this research the validation of different turbulence models of a hovering propeller at different pitch angles and revolutions has been investigated. For this purpose, the pressure on the propeller surface at different cross sections has been calculated numerically by six different turbulence models and compared with the experimental data. In the first part, the effects of changing the blade angle have been discussed, in this case, the angles of 0, 2, and 12 degrees have been selected. The results showed that changes in the pitch angle of the propeller have led to an increase in the error rate of numerical calculations. At a high pitch angle and in the same chord section, the highest amount of error is produced in leading edge section of the propeller, among which the best model in terms of production error is the k-e RNG. Also, due to the possibility of the formation of shock waves, the S-A and k-e standard models have very large errors, which shows these models' inability to simulate rotating flow with shock waves.
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