CO2 addition and pressure effects on laminar and turbulent lean premixed CH4 air flames

Date

2009-01-01

Author

Cohé, Cecile
Chauveau, Christian
Goekalp, Iskender
Kurtuluş, Dilek Funda

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

145
views

0
downloads

An experimental study on CH4-CO2-air flames at various pressures is conducted by using both laminar and turbulent Bunsen flame configurations. The aim of this research is to contribute to the characterization of fuel lean methane/carbon dioxide/air premixed laminar and turbulent flames at different pressures, by studying laminar and turbulent flame propagation velocities, the flame surface density and the instantaneous flame front wrinkling parameters. PREMIX computations and experimental results indicate a decrease of the laminar flame propagation velocities with increasing CO2 dilution rate. Instantaneous flame images are obtained by Mie scattering tomography. The image analysis shows that although the height of the turbulent flame increases with CO2 addition rate, the flame structure is quite similar. This implies that the flame wrinkling parameters and flame surface density are indifferent to the CO2 addition. However, the pressure increase has a drastic effect oil both parameters. This is also confirmed by a fractal analysis of instantaneous images. It is also observed that the combustion intensity S-T/S-L increases both with pressure and the CO2 rate. Finally, the-mean fuel consumption rate decreases with the CO2 addition rate but increases with the pressure.

Subject Keywords

Physical and Theoretical Chemistry, Mechanical Engineering, General Chemical Engineering

URI

https://hdl.handle.net/11511/46306

Journal

PROCEEDINGS OF THE COMBUSTION INSTITUTE

DOI

https://doi.org/10.1016/j.proci.2008.06.181

Collections

Department of Aerospace Engineering, Article

Suggestions

OpenMETU
Core

Experimental study of solid propellant combustion instability Çekiç, Ayça; Ulaş, Abdullah; Department of Mechanical Engineering (2005) In this study, experimental investigation of solid propellant combustion instability using an end burning T-Burner setup is performed. For this purpose, a T-Burner setup is designed, analyzed, constructed and tested with all its sub components. T-Burner setup constructed is mainly composed of a base part, a control panel and the T-Burner itself. Combustion chamber, pressure stabilization mechanism, pressurization system, measurement instruments and data acquisition systems form the T-Burner. Pressure stabil...
Laser-induced ignition of solid propellants for gas generators Ulaş, Abdullah (Elsevier BV, 2008-05-01) An experimental study was conducted to evaluate the ignitibility of a family of potential gas-generator solid propellants under different CO(2) laser heat fluxes and chamber operating conditions. Six types of solid propellant were tested: one baseline and five variations. The ingredients of the baseline propellant were ammonium nitrate, guanidine nitrate, potassium nitrate, and polyvinyl alcohol. The other five propellant variations were obtained by adding different amounts of carbon black, ammonium perchlo...
Phase Behavior of Carbon Dioxide and Polyhedral Oligomeric Silsesquioxanes with Two Different Functional Groups Dumanlilar, Beril; Dilek Hacıhabiboğlu, Çerağ (Elsevier BV, 2020-09-01) Phase behavior of carbon dioxide and polyhedral oligomeric silsesquioxanes (POSS) modified with two different functional groups is studied in the temperature range of 308-323 K, up to 22 MPa. Different than the common types, one of the eight functional groups attached to the Si atoms of these POSS is a CO2-philic functional group, methacryl, while the rest are branched alkyl chains, either isooctyl (MIOPOSS) or isobutyl (MIBPOSS). Methacrylisobutyl POSS-CO2 binary system exhibits pressure-induced melting te...
Vulcan-Supported Pt Electrocatalysts for PEMFCs Prepared using Supercritical Carbon Dioxide Deposition Bayrakceken, Ayse; Smirnova, Alevtina; Kitkamthorn, Usanee; Aindow, Mark; Tuerker, Lemi; Eroğlu, İnci; ERKEY, CAN (Informa UK Limited, 2009-01-01) In this study, supercritical carbon dioxide (scCO(2)) deposition was used to prepare vulcan-supported Pt (Pt/Vulcan) electrocatalysts for proton exchange membrane fuel cells (PEMFCs), and the effects of process variables on the properties of the electrocatalysts were investigated. The two different methods used to reduce the organometallic precursor were thermal reduction in nitrogen at atmospheric pressure and thermal reduction in scCO(2). In the former method, the maximum Pt loading achieved was 9%, and t...
Phase behavior of 1,3,5-tri-tert-butylbenzene-carbon dioxide binary system Dilek Hacıhabiboğlu, Çerağ; Gulari, Esin (Elsevier BV, 2008-01-01) 1,3,5-tri-tert-butylbenzene (TTBB) is solid at ambient conditions, and has substantial solubility in liquid and supercritical carbon dioxide. We present the phase behavior of TTBB-CO2 binary system at temperatures between 298 and 328 K and at pressures up to 20 MPa. Phase diagrams showing the liquid-vapor, solid-liquid and solid-vapor equilibrium envelopes are constructed by pressure-volume-temperature measurements in a variable-volume sapphire cell. TTBB is highly soluble in CO2 over a wide range of compos...

Citation Formats

C. Cohé, C. Chauveau, I. Goekalp, and D. F. Kurtuluş, “CO2 addition and pressure effects on laminar and turbulent lean premixed CH4 air flames,” PROCEEDINGS OF THE COMBUSTION INSTITUTE, pp. 1803–1810, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46306.