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Aerodynamic Design of the NASA Rotor 67 for Non Uniform Inflow

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Aerodynamic Design of the NASA Rotor 67 for Non Uniform Inflow ( aerodynamic-design-nasa-rotor-67-non-uniform-inflow )

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Master Thesis Report 3D Flow Simulation of the NASA Rotor 67 Figure 7.22: 50% Span Uniform Inflow Blade to Blade Domain Velocity Vector Figure 7.24: 80% Span Uniform Inflow Blade to Blade Domain Velocity Vector From the entropy plots shown in figure 7.26, 7.27, the increased incidence angle leads to a reduced wake trail. Finally, the pressure contour of the blade to blade domain is presented in figure 7.32, 7.33, 7.34, 7.35, 7.36 and 7.37. From these plots, the shift in the TE shockwave as well as the change in the TE wake pattern can be clearly visualized. This is especially clear in the 80% span position plot of the blade to blade domain static pressure contour. 7.4.3 Comparison of the Streamlines Visualization The visualization of the streamlines between the case of a uniform and non uniform inflow is presented in figure 7.38 and 7.39. It can be clearly seen that the effect of a non uniform inflow is a change in the magnitude of the velocity vector near the tip of the blade. Although the change in incidence angle at the blade’s LE cannot be observed clearly, the effect of the increased incidence angle is reflected in the change in flow pattern at the trailing edge of the blade. Figure 7.23: 50% Span Non Uniform Inflow Blade to Blade Domain Velocity Vector Figure 7.25: 80% Span Non Uniform Inflow Blade to Blade Domain Velocity Vector 7.28, 7.29, 7.30 and 7.31 , it can be concluded that 84

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