INFLUENCE OF CANARD-TYPE CONTROL SURFACE ON THE INTERNAL AND EXTERNAL PERFORMANCE CHARACTERISTICSnOF NACELLE-MOUNTED SUPERSONIC DIFFUSERS (CONICAL CENTERBODY) AT A REARWARD BODY STATION FOR A MACH NUMBER OF 2.0

摘要

The effects of the wake resulting from control-surface deflection on the internal performance of two supersonic diffusers (conical center-body type) and oh the engine-body interference drag were investigated in the Lewis 8- by 6-foot supersonic wind tunnel at a Mach number of 2.0, angles of attack from 0° to 10°, control-surface deflection angles from 0°to 9 1/2°, and at a Reynolds number of approximately 1.5×106nbased on inlet diameter. Nacelle-type engines were mounted on a body of revolution approximately 10 mean chords downstream of and In the plane of the control surface. The diffuser performance was determined at two spanwise locations:(l) alined with and (2) approximately 6 inches outboard of the control-surface tips- A modified diffuser was investigated in the outboard location. Both diffusers were tested in the undisturbed stream.