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   Articles with "combustion instability" as a keyword



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Large eddy simulations of spray combustion instability in an aero-engine combustor at elevated temperature and pressure

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recommendations! Published in 2021 at "Aerospace Science and Technology"

DOI: 10.1016/j.ast.2020.106329

Abstract: Abstract Large eddy simulations (LES) of self-excited spray combustion instability in an aero-engine combustor are performed to investigate the mechanisms of combustion instability. Three spray flames with different droplet diameters and wall boundary conditions are… read more here.

Keywords: large eddy; spray combustion; combustion instability; combustion ... See more keywords

Large-eddy simulation and linear acoustic modeling of entropy mode oscillations in a model combustor with coolant injection

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recommendations! Published in 2018 at "Chinese Journal of Aeronautics"

DOI: 10.1016/j.cja.2018.05.013

Abstract: Abstract Lean-burn combustor is particularly susceptible to combustion instability and the unsteady heat release is usually considered as the excitation of the self-maintained thermo-acoustic oscillations. The transverse coolant injection is widely used to reduce the… read more here.

Keywords: large eddy; coolant injection; entropy; combustion instability ... See more keywords
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A comprehensive investigation of LSTM-CNN deep learning model for fast detection of combustion instability

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recommendations! Published in 2021 at "Fuel"

DOI: 10.1016/j.fuel.2021.121300

Abstract: Abstract In this paper, we propose a deep learning model to detect combustion instability using high-speed flame image sequences. The detection model combines Convolutional Neural Network (CNN) and Long Short-Term Memory network (LSTM) to learn… read more here.

Keywords: combustion instability; model; deep learning; detection ... See more keywords

Analysis of Combustion Instability of Methane–Air Premixed Swirling Flame Based on OH-PLIF Measurements

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recommendations! Published in 2023 at "ACS Omega"

DOI: 10.1021/acsomega.2c07987

Abstract: A method for determining combustion instability using flame structure parameters is presented. A speaker is used to provide controllable external excitation for the combustion system. The experimental object is a methane–air swirl premixed flame. The… read more here.

Keywords: structure parameters; combustion instability; flame; flame structure ... See more keywords

Effect of temporal increase in equivalence ratio on combustion instability of a lean-premixed swirling hydrogen flame

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recommendations! Published in 2024 at "Physics of Fluids"

DOI: 10.1063/5.0204026

Abstract: The effect of temporal increase in the equivalence ratio on the combustion instability of a lean-premixed low-swirl hydrogen jet flame in a low-swirl combustor (LSC) is investigated in detail using a high-fidelity Large-Eddy Simulation (LES).… read more here.

Keywords: equivalence ratio; oscillation; combustion instability; combustion ... See more keywords

Effects of Mean Flow, Temperature Ratio and Area Ratio on Combustion Instability of a Dump Combustor

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recommendations! Published in 2019 at "Combustion Science and Technology"

DOI: 10.1080/00102202.2019.1661998

Abstract: ABSTRACT This paper studies the effect of mean flow, temperature ratio and area ratio of a dump combustor on combustion instability. From an explicit transfer function representation of combustor acoustics, it is shown that mean… read more here.

Keywords: mean flow; combustion instability; combustion; area ... See more keywords

Combustion instability mitigation by magnetic fields.

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recommendations! Published in 2017 at "Physical Review E"

DOI: 10.1103/physreve.95.063113

Abstract: The present interdisciplinary study combines electromagnetics and combustion to unveil an original and basic experiment displaying a spontaneous flame instability that is mitigated as the non-premixed sooting flame experiences a magnetic perturbation. This magnetic instability… read more here.

Keywords: combustion instability; mitigation magnetic; instability mitigation; instability ... See more keywords

Experimental study on combustion instability characteristics in a pre-chamber natural gas engine under lean burn conditions

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recommendations! Published in 2024 at "International Journal of Engine Research"

DOI: 10.1177/14680874241254882

Abstract: Pre-chamber jet ignition is a key technology for future high-efficiency natural gas (NG) engines. It can achieve fast and stable combustion through excellent ignition performance. However, there are still some challenges, such as high combustion… read more here.

Keywords: pre chamber; combustion; combustion instability; engine ... See more keywords

Multiphysics Modeling for Combustion Instability in Paraffin-Fueled Hybrid Rocket Engines

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recommendations! Published in 2024 at "Journal of Spacecraft and Rockets"

DOI: 10.2514/1.a35758

Abstract: The use of paraffin-based fuels is a promising approach to a low regression rate in hybrid rocket engines, and the capability to describe and predict combustion instability in the presence of liquefying fuels becomes an… read more here.

Keywords: combustion; paraffin; hybrid rocket; combustion instability ... See more keywords

Model for Combustion Instability in Hybrid Rocket Engines Burning Liquefying Fuels

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recommendations! Published in 2023 at "AIAA Journal"

DOI: 10.2514/1.j062730

Abstract: Starting from the data measured in several static firings of two laboratory-scale hybrid rocket engines of different sizes burning gaseous oxygen with either a liquefying fuel or a pyrolyzing polymer, a mechanism for the combustion… read more here.

Keywords: combustion; hybrid rocket; rocket engines; combustion instability ... See more keywords

A Real-Time Combustion Instability Simulation with Comprehensive Thermo-Acoustic Dynamic Model

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recommendations! Published in 2018 at "Energies"

DOI: 10.3390/en11040883

Abstract: The thermo-acoustic instability in the combustion process of a gas turbine is caused by the interaction of the heat release mechanism and the pressure perturbation. These acoustic vibrations cause fatigue failure of the combustor and… read more here.

Keywords: thermo acoustic; combustion instability; instability model; combustion ... See more keywords