Empirical Modeling of Subcritical Hopf Bifurcation of Thermoacoustic Stirling Engine

Autor: Chuan-Heng Lai, Shu-Han Hsu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Aerospace, Vol 11, Iss 5, p 347 (2024)
Druh dokumentu: article
ISSN: 2226-4310
DOI: 10.3390/aerospace11050347
Popis: This study models the subcritical Hopf bifurcation in thermoacoustic Stirling engines using the Stuart–Landau model, highlighting the role of nonlinear dynamics. By inducing self-sustained oscillations and measuring pressure fluctuations across different temperature gradients imposed on the regenerator, we reveal the engine’s transition to a nonlinear domain, characterized by heightened oscillation amplitudes and unique periodic patterns. Interpreted Landau constants and growth rates illuminate the stabilizing effects of nonlinear dynamics, demonstrating the Stuart–Landau model’s applicability in thermoacoustic engine analysis. Our research confirms that this empirically refined model reliably describes oscillation amplitudes and transient phenomena, contributing valuable perspectives for advancing thermoacoustic engine design and operational understanding.
Databáze: Directory of Open Access Journals