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Geminus Boeing Project Contract No.EVE-16-2929 <br /> Technology Development CEI Project No. 160731 <br /> AgAh ! s- Avg <br /> • • • ••. <br /> Mean Velocity:Magnitude(ft/s) <br /> 2.X 0. 2. 4. 6. 8. 10. 12. 14. 16. 18. 20. <br /> Figure 23: Illustration of CFD velocity measurement points on the aircraft crown and <br /> fuselage relative to the centerline velocity magnitude contour plot (Case <br /> 1/Scenario 1). <br /> Mean of VelocityW(ft/s) <br /> -3.0 -1.4 -1.8 -1.2 -0.6 0.0 0.6 1.2 1.8 2.4 3.0 <br /> Figure 24: Vertical component velocities (towards the floor is negative) at the aircraft <br /> window bottom line elevation for Fuselage Paint Mode (Case 1/Scenario 1). <br /> It is evident that both the VelGrid measurements and the CFD have a large variation in <br /> downward flow velocity across the length of the aircraft fuselage. The CFD solution shows that <br /> some point locations that happen to be in one of the lower velocity zones between the downward <br /> air flows have a lower reported velocity while those that do not lie in these locations have a <br /> consistent value of around 150 fpm, shown in Figure 24. The measurements also have these <br /> lower velocity points, with extremely low (or negative) velocity points being either not recorded <br /> or removed from the data set. <br /> 35 <br />