Document Type


Date of Degree

Fall 2010

Degree Name

MS (Master of Science)

Degree In

Mechanical Engineering

First Advisor

Chen, L-D

First Committee Member

Ratner, Albert

Second Committee Member

Lin, Ching-Long


There are numerous numerical and experimental studies to find correlations of octane rating with fuel properties. This thesis was based on the hypothesis that quenching characteristics at ignition locations impact the flame development. Conversely, determination of quenching characteristics might serve as an effective measure to determine the fuel mixture octane number. This hypothesis was tested with premixed flame experiments using primary reference fuels (iso-octane and n-heptane) and commercial grade gasoline. Premixed flame experiments were conducted on a flat flame burner. Primary reference fuels of different ratios were taken and correlated to their respective thermal quenching condition by introducing co-flowing inert gasses at room temperature with fuel-air mixture. The inert gasses that were used in the experiment are nitrogen and helium and the results are analyzed using a camera and an imaging spectrometer. The experimental results support the hypothesis that flame quenching can be correlated to fuel mixture octane number, and holds potential as an alternative method to determine the octane number.


Lift off, Octane rating, Premixed combustion, Quenching


vi, 80 pages


Includes bibliographical references (pages 79-80).


Copyright 2010 Ankush Bhasin