Passive gust alleviation of a flying-wing aircraft by analysis and wind-tunnel test of a scaled model in dynamic similarity

An investigation was conducted to evaluate the effectiveness of a passive gust alleviation device (PGAD) installed in flying-wing aircraft 62.3 m wing span at large swept back angle. It performed by numerical analysis and validated wind-tunnel test 1:25 reduced scale physical model dynamic similarity full-scale aircraft. The 1- cosine with range parameters specified airworthiness regulation CS-23 taken response that led 7 ∼ 9 % results employing PGAD. dominated first three modes most critical frequency close bending mode wing. designed manufactured based on scaling law, proved be excellent deviation less than 5.5% between measured vibration model. wind tunnel show 8.3 14.3 according tip deflection associated PGAD oscillation amplitude 4.0 ∘ 15.5 . present study shows can scaled similarity.