Computational Simulation and Experimental Measurements for a Delta Wing with Periodic Suction and Blowing

The low-speed, laminar flowfield for a 70-deg sweep delta wing is investigated. Solutions to the unsteady, threedimensional, compressible Navier-Stokes equations were obtained on an unstructured grid to match results from an experiment performed in a water tunnel.The experiment was conducted with the delta wing at an angle of attack of 35 deg a nd the freestream flow at a root-chord Reynolds number of 4.07 * 10^4. Particle image velocimetry measurements were made for the flowfield while periodic suction and blowing was taking place along the delta wing leading edge. The computational results are analyzed and compared with the experimental results to show how computations and experiments can be conducted in a synergistic fashion. Details about the primary vortex location, vortex burst, secondary vortex, and shear layer interaction are shown and discussed.