Static and Dynamic SACCON PIV Tests, Part II: Aft Flow Field

Abstract

In an integrated design stereoscopic Particle Image Velocimetry (PIV) has been applied for the experimental investigation of a static and dynamic Unmanned Combat Air Vehicle (UCAV) model. Within the scope of RTO-AVT 161 the SACCON (Stability And Control CONfiguration) model is used for analyzing synergetic design criteria and to reduce the timescale of design phase by integrating computational and experimental analyses early in the design chain. In order to supply velocity field information on this model a joint meas-urement campaign was conducted between DLR and ONERA. This enables to visualize and quantify the flow field in several planes over the whole length of the model. This paper de-scribes the aft flow field using high resolution cameras yielding a vector spacing of 2 mm and total field of view of 810x420 mm2. Measurements were performed on a stationary as well on a pitching SACCON model (f = 1 Hz). The flow topology is described for the static case in dependency of the angle of attack discussing differences in the flow fields to two pitching cases of different pitch amplitude as function of the phase angle.