Multistability and Complex Routes of Supersonic Inlet Start/Unstart

Abstract

analyzed. The loops-coupled hysteresis, associated with the interaction among the multiple inlet flow patterns, indicates strong route dependence of multiple flow pattern transitions. The complexity of dynamics behaviors involving loops-coupled hysteresis and complex routes originates from the memory effect of initial states and the existence of multisolution domain. The control of bifurcation system thus depends not only on the instantaneous valueoftheinputbutalsoonthehistoryofitsoperation.Abetterunderstandingofmultistabilityandcomplexroutes of inlet start/unstart may be useful as a guide in thinking about the bifurcation mechanism, designing the control routes, and actively controlling the bifurcation behaviors of inlet start/unstart.