Boeing 737 Aerodynamic Coefficient

[C_K]

Hi

I am studying the aerodynamic coefficients of a boeing 737-800 NG.

In particular wingtip devices and have constructed a model in solidworks to test on Ansys cfd.

I am creating a hypothetical situation of testing the improvement in take off performance by using winglets. To do this, i am simulating the 737 with and without winglets.

I have the Ansys sim set at take off velocity and 8 degrees AoA.

I am getting a Cl value of 2.5 and Cd of 0.3 i was wondering how far off that is to realistic values of cl and cd at take off?

Thank you, i would really appreciate any insight.

[John Farley]

I have no data for the 737.

However in general a Cl max of 2.5 would be at the high end for wings - even in the landing configuration. I would be suspicious of more than 2 in the TO config.

You should be able to check on typical airliner Cl max numbers fairly easily.

[CliveL]

Like John Farley, I have no B737 data. However, as a rough order of magnitude based on similar airplanes I would expect a CL around 1.4 for TO flap at 8 deg AoA and a Cd around 0.1

[FlightPathOBN]

Aside from any models or variables, none of the various configurations of winglets from Boeing or Airbus, have any advertised effect on take-off performance. Sorry.