|Table of Contents|

Dynamic behavior of thermoacoustic instabilities of an coaxial swirl injector using recurrence network(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2021年01期
Page:
36-42
Research Field:
研究与设计
Publishing date:

Info

Title:
Dynamic behavior of thermoacoustic instabilities of an coaxial swirl injector using recurrence network
Author(s):
YANG Shangrong1;  ZHOU Chenchu1;  WANG Muxin2
(1.Science and Technology on Liquid Rocket Engine Laboratory, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China; 2. 210 Institute, The Sixth Academy of China Aerospace Science & Industry Corp., Xi'an 710065, China)
Keywords:
coaxial swirl injector;  thermoacoustic instability;  recurrence network;  network measures;  intermittency
PACS:
V453.1
DOI:
-
Abstract:
An experimental investigation of a laboratory-scale coaxial swirl injector in a cylindrical combustor was carried out. The dynamic behavior transits from combustion noise to quasiperiodic oscillations via intermittency with increasing mixture ratio. The topologies of recurrence networks constructed from the time series of acoustic pressure for three typical equivalence ratios were obtained. It is founded that the topologies show characteristics of random, central concentration and limit cycle boundary, and torus in the state of combustion noise, intermittency and quasiperiodic oscillation respectively. Topological measures of complex networks, namely clustering coefficient, characteristic path length, betweenness centrality, global efficiency, network diameter and assortativity were computed and used to distinguish different dynamical regimes in a turbulent combustor. It is found that these network properties capture the change in physical state of the system dynamics during the transition from combustion noise to combustion instability.

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Last Update: 2021-02-20