Influence of Fuel Staging on Thermo-Acoustic Oscillations in a Premixed Stratified Dual-Swirl Gas Turbine Model Combustor
Sign Up to like & getrecommendations! Published in 2020 at "Flow, Turbulence and Combustion"
DOI: 10.1007/s10494-020-00158-6
Abstract: In several technical combustion systems for lean, premixed combustion, mixture stratification plays an important role, such as in stationary and aero gas turbines. The current paper focuses on a detailed characterization of a dual-swirl gas… read more here.
Keywords: thermo acoustic; acoustic oscillations; flame; combustion ... See more keywords
Evaluation of thermoacoustics parameters of CoFe2O4–ethylene glycol nanofluid using ultrasonic velocity technique
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Materials Science: Materials in Electronics"
DOI: 10.1007/s10854-018-0386-1
Abstract: Chemical co-precipitation method was employed to synthesize cobalt ferrite (CoFe2O4) nanoparticles and to prepare stable nanofluids. The cobalt ferrite nanoparticles and the prepared nanofluids were characterized further for their structural, morphological, elemental, magnetic properties and… read more here.
Keywords: cofe2o4 nanoparticles; thermo acoustic; ethylene glycol; ultrasonic velocity ... See more keywords
Impact of Ceramic Substrates Geometry on the Performance of Simple Thermo-Acoustic Engines
Sign Up to like & getrecommendations! Published in 2017 at "Experimental Techniques"
DOI: 10.1007/s40799-017-0211-4
Abstract: This work experimentally examines the influence of the stack geometry and position on the performance of thermo-acoustic engines (TAE). Twenty cordierite honeycomb ceramic stacks with square pores and five different lengths (7, 13, 17, 22… read more here.
Keywords: thermo acoustic; impact ceramic; geometry; acoustic engines ... See more keywords
A criterion for thermo-acoustic stability based on the flux of acoustic energy
Sign Up to like & getrecommendations! Published in 2021 at "Combustion and Flame"
DOI: 10.1016/j.combustflame.2021.01.014
Abstract: Abstract This paper introduces a conservative criterion for thermo-acoustic stability. By subdividing a thermo-acoustic system into a passive subsystem – containing no source of acoustic energy – and an active subsystem containing all sources, the… read more here.
Keywords: acoustic energy; thermo acoustic; stability; criterion ... See more keywords
Experimental investigation on thermo-acoustic instability and heat transfer of supercritical endothermic hydrocarbon fuel in a mini tube
Sign Up to like & getrecommendations! Published in 2018 at "Experimental Thermal and Fluid Science"
DOI: 10.1016/j.expthermflusci.2018.03.017
Abstract: Abstract The thermo-acoustic instability and heat transfer coefficients of a kerosene kind endothermic hydrocarbon fuel were experimentally investigated in a horizontal mini tube at supercritical pressure. The test section was a 316 stainless steel tube… read more here.
Keywords: thermo acoustic; oscillation; heat transfer; heat ... See more keywords
Numerical analysis of the flow pathlines in thermo-acoustic couples
Sign Up to like & getrecommendations! Published in 2019 at "Procedia Manufacturing"
DOI: 10.1016/j.promfg.2019.05.035
Abstract: Abstract Thermo-acoustic systems use a high amplitude sound-wave for refrigeration or electricity generation without the drawbacks of expensive construction, adverse environmental impact or high maintenance cost. The effective conversion of energy occurs within the “stack”… read more here.
Keywords: thermo acoustic; stack; acoustic systems; numerical analysis ... See more keywords
Thermo-Acoustic Properties of (Ethanol + n-Heptane) Binary Mixtures from 293.35 to 433.89 K and up to 5.0 MPa
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Chemical & Engineering Data"
DOI: 10.1021/acs.jced.0c00237
Abstract: The experimental speeds of sound for the binary system of ethanol (1) + n-heptane (2) with the mole fractions of ethanol being (0.100, 0.300, 0.500, 0.700, and 0.900) were measured by Rayleigh-Bril... read more here.
Keywords: thermo acoustic; ethanol heptane; heptane binary; acoustic properties ... See more keywords
Thermo-acoustic study of transformer oils through ultrasonic technique
Sign Up to like & getrecommendations! Published in 2020 at "Petroleum Science and Technology"
DOI: 10.1080/10916466.2020.1739708
Abstract: ABSTARCT Study of two unused transformer oils was carried out by determining the thermo-acoustical parameters employing ultrasonic interferometer. The two transformer oils studied were of the year 1997 and 2017 make. The density measurement was… read more here.
Keywords: thermo acoustic; transformer oils; transformer; acoustic study ... See more keywords
Effect of geometrical parameters and use of porous material in a Helmholtz resonator on suppression of thermo-acoustic instabilities
Sign Up to like & getrecommendations! Published in 2023 at "International Journal of Spray and Combustion Dynamics"
DOI: 10.1177/17568277231158900
Abstract: Thermo-acoustic instabilities are mainly formed due to in-phase superposition of non-uniform heat release and pressure variation in the combustors of gas turbines, rocket engines and other acoustically confined spaces. These instabilities not only damage the… read more here.
Keywords: neck; thermo acoustic; acoustic instabilities; material ... See more keywords
System-level graphene foam speaker and the simulation of the thermo-acoustic process.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.459546
Abstract: Recent studies have shown that microporous graphene foam (GF) exhibits photoacoustic effect when irradiated with modulated light. Inspired by this phenomenon, we fabricated a light emitting diode (LED)-induced system-level GF speaker that generates photoacoustic waves… read more here.
Keywords: graphene foam; effect; thermo acoustic; system level ... See more keywords
A Real-Time Combustion Instability Simulation with Comprehensive Thermo-Acoustic Dynamic Model
Sign Up to like & getrecommendations! 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