Spectral, entropy and bifurcation analysis of the dynamics of a reverse-flow system

TL;DR

This paper analyzes the complex dynamics of a reverse-flow system using spectral, entropy, and bifurcation methods, revealing the presence of chaotic oscillations influenced by system parameters.

Contribution

It introduces a comprehensive analysis of reverse-flow system dynamics, highlighting the conditions leading to chaos and the impact of reverse flow on oscillatory behavior.

Findings

Chaotic oscillations occur over a wide parameter range.

Reverse flow induces self-oscillations similar to a stimulated pendulum.

Spectral and entropy analysis effectively characterize system dynamics.

Abstract

The work concerns the spectral, entropy and bifurcation analysis of the dynamics of a reverse-flow system. The existence of chaotic oscillations was demonstrated in a wide range of changes in the parameters of the model. The model of such a system can be compared to a periodically stimulated pendulum. The periodic apparatus here is a tubular reactor, which can generate its own oscillations. Reverse flow is cyclical stimulation. As a result, both of these devices can start to oscillate chaotically, and they actually do. The purpose of using reverse flow is to increase the conversion degree. This is because after reverse, the cold stream of raw material falls into the heated reactor inlet.