年間 12 号発行
ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684
Indexed in
EXPERIMENTAL AND NUMERICAL ANALYSIS OF SPRAY DISPERSION AND EVAPORATION IN A COMBUSTION CHAMBER
要約
This work investigates a set of two-phase flow submodels to propose a reliable complete numerical model that is able to predict flow and evaporating droplet properties under industrial gas turbine conditions. For these purposes, a confined complex spray configuration was studied experimentally and numerically. Measurements of the gas phase were conducted using the laser Doppler anemometry (LDA) technique. The nozzle was operated in a modular combustor at elevated pressure and temperature conditions. For the dispersed phase, a nonreacting phase (water) was chosen to prevent chemical reactions. The focus of the investigation was on spray propagation and evaporation. Droplet velocity components and droplet diameters were measured using phase Doppler anemometry (PDA). Radial profiles were taken along two axes, recording the axial and radial velocity components as well as the probability density functions of the diameter distributions. Numerical simulations were performed within the framework of a Reynolds-averaged NavierStokes (RANS)-based Eulerian−Lagrangian approach to appraise the prediction techniques used. Under the framework of two-way coupling, the dispersed phase effects on the momentum, turbulence quantities, energy, and mass were accounted for by adding appropriate source terms to each transport equation of the gas phase. A significantly large droplet number was used to ensure reliable statistical averaging so that the dispersed phase properties do not depend on the parcel number within the control volume. Comparisons between the numerical and experimental results showed acceptable agreement for the droplet velocities, axial mass flux, and Sauter mean diameter, but some disagreements were observed for the fluctuations and the apex angle of the spray.
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Chrigui Mouldi, Zghal Ali, Sadiki Amsini, Janicka Johannes, Spray evaporation and dispersion of n-heptane droplets within premixed flame, Heat and Mass Transfer, 46, 8-9, 2010. Crossref
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Chrigui Mouldi, Roisman Ilia V., Batarseh Feras Z., Sadiki Amsini, Tropea Cam, Spray Generated by an Airblast Atomizer Under Elevated Ambient Pressures, Journal of Propulsion and Power, 26, 6, 2010. Crossref
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Sacomano Filho Fernando Luiz, Fukumasu Newton Kiyoshi, Krieger Guenther Carlos, Numerical simulation of an ethanol turbulent spray flame with RANS and diffusion combustion model, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 35, 3, 2013. Crossref
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Chrigui M., Gounder J., Sadiki A., Janicka J., Masri A. R., Acetone Droplet Behavior in Reacting and Non Reacting Turbulent Flow, Flow, Turbulence and Combustion, 90, 2, 2013. Crossref
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Richardson Daniel R., Brinker Andrew J., Polanka Marc D., Lynch Amy, Blunck David L., Liquid Spray Characterization in Flow Field with Centripetal Acceleration, 52nd Aerospace Sciences Meeting, 2014. Crossref
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Freitag S., Experimental investigations of fuel preparation in a swirling airflow under realistic conditions without reaction in a combustor model with a point fuel source, CEAS Aeronautical Journal, 9, 3, 2018. Crossref
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Sadiki Amsini, Ahmadi W., Chrigui Mouldi, Toward the Impact of Fuel Evaporation-Combustion Interaction on Spray Combustion in Gas Turbine Combustion Chambers. Part II: Influence of High Combustion Temperature on Spray Droplet Evaporation, in Experiments and Numerical Simulations of Diluted Spray Turbulent Combustion, 17, 2011. Crossref
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Sadiki A., Chrigui M., Dreizler A., Thermodynamically Consistent Modelling of Gas Turbine Combustion Sprays, in Flow and Combustion in Advanced Gas Turbine Combustors, 1581, 2013. Crossref
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Huang Dongxin, Xu Jianguo, Chen Ruiyan, Meng Hua, Large eddy simulations of turbulent combustion of kerosene-air in a dual swirl gas turbine model combustor at high pressures, Fuel, 282, 2020. Crossref