Accession Number:

AD0603904

Title:

A WIND-TUNNEL INVESTIGATION OF THE EFFECTS OF LEADING-EDGE BLOWING JETS UPON THE LIFT, DRAG, AND PITCHING MOMENT OF A 76 DEGREE DELTA WING,

Descriptive Note:

Corporate Author:

PRINCETON UNIV N J

Personal Author(s):

Report Date:

1964-07-01

Pagination or Media Count:

95.0

Abstract:

A wind tunnel investigation was made of the effects of leading edge blowing jets, in the plane of the planform and directed away from the wing, upon the lift, drag, and pitching moment of a 76 degree delta wing of aspect ratio one. A theory for the lift of a flat plate delta is presented and compared with the experimental data. It was found that jet outlet velocityfree-stream velocity is a better parameter than momentum coefficient for the analysis of lift data with the type of blowing jet configuration used. Lift coefficient increased appreciably with blowing at low values of the parameters, and then tended to level off as blowing was increased. At low angles of attack, the only additional drag induced by blowing was the momentum drag due to the rearward thrust of the jets. It was found that such blowing reduced the stability of the wing. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE