Flame Dynamics and Combustion Instability

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Mathematical and Computational Fluid Mechanics".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 3219

Special Issue Editor

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Interests: chemically reacting flow; combustion; emission; data-driven modelling
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Unsteadiness in chemically reacting flows is ubiquitous. In many practical cases, the appearance of combustion instabilities is undesirable, and obtaining physical insights into their mechanisms is scientifically important and challenging. Our understanding of flame dynamics, intrinsic instabilities in premixed and nonpremixed flames, and the effects of coupling with other system instabilities has advanced in recent years. This Special Issue of Fluids invites the submission of contributions on new developments in our fundamental understanding of these unsteady phenomena, novel CFD-based and/or data-driven modeling of flame dynamics and combustion instabilities, and advanced techniques for diagnostics and control.

Dr. Sili Deng
Guest Editor

Manuscript Submission Information

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Keywords

  • flame dynamics
  • combustion instability
  • unsteadiness
  • flow control
  • computational fluid dynamics
  • data-driven modeling
  • diagnostics.

Published Papers (1 paper)

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Research

14 pages, 2945 KiB  
Article
Optical Equivalence Ratio Measurement of a Dual Fuel Burner for Natural Gas and Kerosene
by Manuel Vogel, Michael Bachfischer, Jan Kaufmann and Thomas Sattelmayer
Fluids 2022, 7(2), 43; https://doi.org/10.3390/fluids7020043 - 18 Jan 2022
Cited by 4 | Viewed by 2703
Abstract
A measurement technique for determination of the global and local equivalence ratios from the flame chemiluminescence for a swirl-stabilized lean premixed combustion of natural gas and kerosene is presented. First, we conducted spectrally resolved chemiluminescence studies using an imaging spectrometer to correlate the [...] Read more.
A measurement technique for determination of the global and local equivalence ratios from the flame chemiluminescence for a swirl-stabilized lean premixed combustion of natural gas and kerosene is presented. First, we conducted spectrally resolved chemiluminescence studies using an imaging spectrometer to correlate the ratio of individual chemiluminescence signals to the equivalence ratio. Flame spectra were recorded for a multitude of different lean operating conditions for natural gas and kerosene combustion. The spectra show that, without background correction, the CH*/CO2* ratios for both natural gas and kerosene combustion exhibited a monotonic relationship to the equivalence ratio in the investigated range. Subsequently, bandpass-filtered images of CH* and CO2* chemiluminescence were acquired simultaneously on one camera chip using an image doubler to investigate the local relationship of the CH*/CO2* ratio with the equivalence ratio. The ratio images corroborate the monotonic relationship of the CH*/CO2* ratio to the equivalence ratio. Furthermore, the ratio was found to be influenced by the local reaction zone temperature. The presented technique allows high temporal resolution determination of the local equivalence ratio in lean premixed natural gas and kerosene flames and can thus be applied to quantify equivalence ratio oscillations during unstable combustion. Full article
(This article belongs to the Special Issue Flame Dynamics and Combustion Instability)
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