Dynamic Aeroelastic Instabilities of an Aircraft Wing with Underwing Store in Transonic Regime

Chakradhar Byreddy, Ramana V. Grandhi, Philip Beran
2005 Journal of Aerospace Engineering  
The research used the Transonic Small Disturbance (TSD) theory to better understand the dynamic aeroelastic phenomena and factors that affect the onset of flutter and store induced Limit-Cycle Oscillations (LCO) in the transonic regime. Several parametric studies of the flutter and LCO of an aircraft wing with undenting store in the transonic regime were conducted, as well as an investigation of the effect of inclusion of store aerodynamics on the onset of flutter. The flutter sensitivity was
more » ... alyzed for the following store parameters: (i) Location ofunderwing store center of gravity with respect to aerodynamic root chord, (ii) Location ofunderwing store along the span of the wing and (Hi) Undenving clearance (pylon length). Also, studies were conducted to identify the onset ofLCOfor different configurations of undenving store and flight regimes (unmatched analysis), thereby identifying the parameters that induce LCO. The sensitive parameters that affect flutter andLCO are identified
doi:10.1061/(asce)0893-1321(2005)18:4(206) fatcat:tjhswyrh4rczrmiyhbosuvn4ra