On the applicability of progress variable approach for large eddy simulation of premixed flames

Download

index.pdf

Date

2017

Author

Tekgül, Bulut

Metadata

Show full item record

Item Usage Stats

249
views

147
downloads

Combustion applications are the primary energy source and will continue to be for the near future. Therefore, accurate modeling of combustion applications is crucial to study and improve the processes. In this study, progress variable approach is used with the implementation of a source term found in literature to simulate selected fully premixed combustion applications. CFD computations and preprocessing steps were conducted using OpenFOAM C++ library. Thermophysical values were obtained from zero and one dimensional Cantera simulations and given as initial conditions. Obtaining flame front positions consistent with the experimental results by modeling the flame as a single scalar transport was intended. k-ε RANS and one-equation eddy LES turbulence models were used. Results showed that selected source term can be used independent from the application geometry or used two turbulence models. Good flame front position correlations with experimental profiles were achieved.

Subject Keywords

Flame., Combustion., Computational fluid dynamics.

URI

http://etd.lib.metu.edu.tr/upload/12621688/index.pdf
https://hdl.handle.net/11511/26899

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Computational fluid dynamic analysis of wind loads acting on ground mounted solar panels / Uslu, Veysel Emre; Sarıtaş, Afşin; Uzol, Oğuz; Department of Civil Engineering (2014) Solar energy becomes more important day by day as a result of being part of renewable energy and increasing energy consumption. Although development of photovoltaic panels is enjoying the attention of many researchers, there has not been enough study towards determination of the loads acting on supporting structures of these systems yet. In this thesis, CFD analysis is mainly employed in order to model, analyze and understand the effects of the wind forces acting on solar panels. Also, different from previo...
Investigation of SO2 removal characteristics with limestone under oxycombustion conditions Avşaroğlu, Sevil; Sanin, F. Dilek.; Department of Environmental Engineering (2019) One of the technologies to increase combustion efficiency and decrease CO2 and other emissions is Oxy-Fuel Combustion. Combustion efficiency is higher and emissions are lower when the oxygen concentration of air is higher. In this thesis different characteristics of two indigenous Turkish lignites are investigated by Thermal Gravimetric Analysis (TGA). Pyrolysis is carried out under both N2 and CO2 atmospheres and combustion characteristics is also examined. CO2 acts as an inert gas at lower temperatures. T...
On the pathway of photoexcited electrons: probing photon-to-electron and photon-to-phonon conversions in silicon by ATR-IR KARABUDAK, Engin; Yüce, Emre; SCHLAUTMANN, Stefan; Hansen, Ole; Mul, Guido; Gardeniers, Han (J. G. E.) (2012-01-01) Photoexcitation and charge carrier thermalization inside semiconductor photocatalysts are two important steps in solar fuel production. Here, photoexcitation and charge carrier thermalization in a silicon wafer are for the first time probed by a novel, yet simple and user-friendly Attenuated Total Reflectance Infrared spectroscopy (ATR-IR) system.
The Effect of Synthesis Parameters for the Mesoporous Carbons Using Silica Aerogel Templates Sarıyer, Merve; Sezgi, Naime Aslı (null; 2019-04-22) Hydrogen is considered as one of the most promising future energy carrier due to its high energy density and its production through ethanol steam reforming reaction (SRE) has the potential to be used for its on board production, in fuel cell powered motor vehicles. Nowadays, novel catalysts are investigated for the steam reforming of ethanol reactions in order to achieve high hydrogen yield with low coke formation. One of the novel catalyst is a mesoporous material templated mesoporous carbon. Mesoporous ca...
Numerical investigation of circulating fluidized bed riser hydrodynamics for concentrating solar thermal receiver applications Bilyaz, Serhat; Tarı, İlker; Department of Mechanical Engineering (2015) Various heat transfer fluids and thermal storage materials are considered for concentrating solar power systems to improve the storage capability of the system which compensates the fluctuating behavior of the solar resources. Solid particles can be a good alternative since they have high sensible heat capacity. In addition, they are cheap, environmentally benign and chemically and mechanically stable at high temperatures. In this thesis, hydrodynamics of circulating fluidized bed solar receiver was numeric...

Citation Formats

B. Tekgül, “On the applicability of progress variable approach for large eddy simulation of premixed flames,” M.S. - Master of Science, Middle East Technical University, 2017.