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Dissertation/Thesis Abstract

Hot Jet Ignition Delay Characterization of Methane and Hydrogen at Elevated Temperatures
by Tarraf Kojok, Ali, M.S.M.E., Purdue University, 2017, 155; 10615574
Abstract (Summary)

This study contributes to a better understanding of ignition by hot combustion gases which finds application in internal combustion chambers with pre-chamber ignition as well as in wave rotor engine applications. The experimental apparatus consists of two combustion chambers: a pre chamber that generates the transient hot jet of gas and a main chamber which contains the main fuel air blend under study. Variables considered are three fuel mixtures (Hydrogen, Methane, 50% Hydrogen-Methane), initial pressure in the pre-chamber ranging from 1 to 2 atm, equivalence ratio of the fuel air mixture in the main combustion chamber ranging from 0.4 to 1.5, and initial temperature of the main combustion chamber mixture ranging from 297 K to 500 K. Experimental data makes use of 4 pressure sensors with a recorded sampling rate up to 300 kHz, as well as high speed Schlieren imaging with a recorded frame rate up to 20,833 frame per seconds. Results shows an overall increase in ignition delay with increasing equivalence ratio. High temperature of the main chamber blend was found not to affect hot jet ignition delay considerably. Physical mixing effects, and density of the main chamber mixture have a greater effect on hot jet ignition delay

Indexing (document details)
Advisor: Nalim, M. Razi
Commitee: Larriba-Andaluz, Carlos, Zhu, Likhun
School: Purdue University
Department: Mechanical Engineering
School Location: United States -- Indiana
Source: MAI 57/01M(E), Masters Abstracts International
Subjects: Engineering, Aerospace engineering, Mechanical engineering
Keywords: Combustion, Hydrogen, Ignition, Methane, Schlieren
Publication Number: 10615574
ISBN: 978-0-355-30624-8
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