Langley Research Center Turbulence Modeling Resource

LES: 2-D Coanda Airfoil with Tangential Wall Jet

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The data on this page were provided by T. Nishino.

This LES case is for an airfoil with rounded (circular) trailing edge, over which a tangential jet is blown, causing reduced trailing edge flow separation due to the Coanda effect. The LES was run using an incompressible code, and has been documented in several publications:

• Nishino, T., Hahn, S., Shariff, K., 2010. "Calculation of the turbulent characteristics of flow around a circulation control airfoil using LES (invited)," AIAA Paper 2010-347, https://doi.org/10.2514/6.2010-347.
• Nishino, T., Hahn, S., Shariff, K., 2010. "LES of high-Reynolds-number coanda flow separating From a rounded trailing edge of a circulation control airfoil," 8th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, Marseille, France, June.
• Nishino, T., Hahn, S., Shariff, K., 2010. "Large-eddy simulations of a turbulent Coanda jet on a circulation control airfoil," Physics of Fluids 22, 125105, https://doi.org/10.1063/1.3526757.
• Rumsey, C. L., Nishino, T., 2011. "Numerical study comparing RANS and LES approaches on a circulation control airfoil," Int. J. Heat and Fluid Flow, Vol. 32, 2011, pp. 847-864, https://doi.org/10.1016/j.ijheatfluidflow.2011.06.011; also AIAA Paper 2011-1179, https://doi.org/10.2514/6.2011-1179.

Some relevant information is given here, but the interested reader is referred to the above publications for complete details:

• Airfoil chord = 0.2183 m
• Reference Re = 2.24 million per m
• Reference velocity = 34 m/s
• Reference density = 1.2 kg/m³
• Reference speed of sound = 344 m/s
• Height of inflow plenum chamber inlet = 0.01262 m
• Height of jet slot exit = 0.000503 m
• Tunnel walls located at +-0.508 m
• Airfoil angle of attack = 0

Long-time averaged LES data are provided for two different blowing conditions:

• M_jet approx 0.39: mdot per unit span = 0.0636 kg/(m-s), U_inlet = 4.203 m/s, rho_inlet = 1.2 kg/m³
• M_jet approx 0.64: mdot per unit span = 0.1048 kg/(m-s), U_inlet = 6.924 m/s, rho_inlet = 1.2 kg/m³

Available LES data are provided below. The files include geometry definition and long-time-averaged LES results from a grid with 800 tangential grid points around the Coanda surface, 256 spanwise grid points, and a total of 116 million grid points in the flow field. Other details about the LES grid and methodology can be found in the above references.

• Coanda airfoil surface and plenum points definition
• M_jet = 0.39, Cp_avg on surface
• M_jet = 0.64, Cp_avg on surface
• README_vel_and_turb_coanda.txt
• M_jet = 0.39, avg velocities & turbulence quantities in the field, gzipped file (14.6 MB)
• M_jet = 0.64, avg velocities & turbulence quantities in the field, gzipped file (14.6 MB)
• Coanda airfoil "2-D" (2 planes) version of grid in PLOT3D format, gzipped file (9.3 MB)

Return to: Data from LES - Intro Page

Recent significant updates:
12/18/2019 - added "2-D" version of grid in PLOT3D format

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Page Curator: Clark Pederson
Last Updated: 11/05/2021