Access Type

Open Access Thesis

Date of Award

January 2016

Degree Type

Thesis

Degree Name

M.S.

Department

Mechanical Engineering

First Advisor

Naeim Henein

Abstract

ABSTRACT

AN EXPERIMENTAL INVESTIGATION ON THE EFFECT OF

INTAKE CHARGE TEMPERATURE AND INJECTION TIMING

ON AUTOIGNITION OF LOW CETANE NUMBER FUEL

(SASOL IPK)

by

SWAPNIL S BODELE

May 2016

Advisor: Dr. Naeim Henein

Major: Mechanical Engineering

Degree: Master of Science

Although diesel engines are considered the best powerhouses for their heavy-duty

capabilities, concerns have been raised because of their emission issues. Alternative

fuels like jet fuels can be substitute to them for improved efficiencies. The Department Of

Defense uses JP8 for their combat vehicles under their Single Fuel Concept for a better

logistic supply chain. However, due to the projected age of depletion of crude oil

reservoirs, synthetic blends are being considered for their abundant availability.

One such blend, SASOL IPK, a Coal to Liquid based fuel prepared by the Fisher-

Tropsch process is considered in this study. This thesis shows results from experiments

conducted on single cylinder PNGV engine to study the effect of intake charge

temperature and injection timing on ignition delay of SASOL IPK. Speed, fuel injection

pressure, swirl ratio and charge density were kept constant for all data points.

Two cases were considered, one with constant SOI and varying intake air

temperature and the other with constant intake air temperature and varying SOI. It was

observed that with an increase in intake air temperature and advancing injection timing,

ignition delay of the fuel reduced significantly. NTC regime and cool flame also decreased

drastically at higher intake air temperatures and advanced injection timing.

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