Experimental investigation of vortex-tail interaction on a 76/40 degree double-delta wing

摘要

An experimental investigation was conducted to quantify the vortex-tail interaction on a 76-40-deg double-delta wing model. ^The effects of different fillets at the wing/strake juncture, tail span-wise positions, and angles of attack were evaluated. ^The vertical tails were instrumented with 28 fast-response pressure transducers. ^Pressure time histories and frequency power spectral densities were analyzed for 35 configurations. ^Angle of attack was varied from -2 to 40 deg, tunnel dynamic pressure was 26.74 psf, and Reynolds number was 1.3 million. ^The results show a strong dependence on fillet geometry, tail position, transducer measurement location, and angle-of-attack on the magnitude and frequency of the tail response to the vortex forcing. ^In addition, a low-frequency pulse was found that contained tremendous energy. ^(Author)