INSTABILITIES, TRANSITIONS AND TURBULENCE

Experimental results of boundary layer transition locations on two low-drag airfoils tested in the NAL 1.5 m low speed wind tunnel are presented. Measurements made included model pressure distributions and unsteady signals from surface mounted hot-films over an incidence range of 0 –6°. Chemical sublimation technique was also utilized to infer location of transition in one of the studies. The experimental r esults on transition location are discussed and co mpared with earlier data available in the li terature.