Volume 7, 2015Progress in Flight Physics – Volume 7
|Page(s)||475 - 488|
|Published online||08 June 2015|
Wave drag reduction due to a self-aligning aerodisk
German Aerospace Center (DLR) 10 Bunsenstraße, Göttingen 37073, Germany
The effect of a self-aligning aerodisk on the wave drag of a blunt slender body in a pitching maneuver has been numerically investigated. The self-alignment was realized by a coupling of the flow solver and a flight mechanics tool. The slender body was pitched with high repetition rate between α = 0° and 20° at M = 1.41. Even at high α, the concept could align the aerodisk to the oncoming flow. In comparison to the reference body without a self-aligning aerodisk, a distinct drag reduction is achieved. A comparison with existing experimental data shows a qualitatively good agreement considering the shock and separation structure and the kinematics of the aerodisk.
© Owned by the authors, published by EDP Sciences, 2015