Akademik Veri Yönetim Sistemi
AIAA Aerospace Sciences Meeting, 2018, Florida, Amerika Birleşik Devletleri, 8 - 12 Ocak 2018, (Tam Metin Bildiri)
In this research, effect of a generalized nonlinear compressor characteristic curve on overall compressor dynamics is considered. For this purpose, Multiple Time Scales (MTS) method is used to parameterize equations in amplitude and frequency explicitly. The pure surge case of the famous Moore-Greitzer model is used as the basis of the study. The compressor characteristic used in the Moore-Greitzer model is generalized to evaluate the effect of the parameters involved. Subsequently, bifurcation theory is deployed to study the effect of nonlinear dynamics on surge behavior. It is observed that the system exhibits supercritical Hopf bifurcation under specific conditions in which surge manifests as limit cycle oscillations. Key parameters are identified in the analytical solution which govern the nonlinear dynamic behavior and are responsible for the existence of limit cycle oscillations. Numerical simulations of the Moore-Greitzer model are found in good agreement with the analytical solution.