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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 Verification of 2D Fitting Results Figure 5.3: Calculation procedure for profile 1265, 1565 and 2265 outlet boundary condition The value of Cθ,2 is first calculated based on free vortex rule. Thereafter, its value is being iterated until the point where the chosen value of Cθ,2 matches with the Cθ,2 from the CFD results. The final value of the chosen Cθ,2, P2 and inlet boundary condition values for the various profiles are presented in table 5.5. Table 5.5: Inlet and Outlet BC Data at R = 0.1265, 0.1565, 0.1865 & 0.2265 Parameters - P01 T01 Cθ,2 P2 R = 0.1265 Profile 186627.41 343.09 199.98 148806.65 R = 0.1565 Profile 210111.7 354.91 134.0 162491.04 R = 0.1865 Profile 241482.33 369.3 105.0 165889.71 R = 0.2265 Profile 298778.3 392.46 83.7363 167293.04 5.3 2D Mesh Topology and CFD Solver settings Before any CFD results can be deemed valid, it is necessary to first verify the quality of the mesh as well as its CFD solver setting. Therefore, the mesh topology and the optimal solver setting will be described first before any discussion on the 2D results is made. 5.3.1 2D Mesh Topology For the generation of the 2D mesh, an in-house mesh generator, UMG 2 was used to generate the mesh for the various blade profiles. Since there is no way to extract the mesh quality information 43

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