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Glow-plug-assisted combustion of nitromethane sprays in a constant volume chamber

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Title Glow-plug-assisted combustion of nitromethane sprays in a constant volume chamber
 
Creator AMBEKAR, A
BHANGALE, R
CHATTERJEE, R
KULKARNI, C
KUMAR, S
CHOWDHURY, A
 
Subject FUEL
HEAT
PRESSURE
ENGINE
Monopropellant
Liquid propellant
Nitromethane
Spray
Glow plugs
Constant volume
 
Description Experimental investigations on spray combustion of nitromethane in air within a constant volume chamber are presented. The sprays produced by a commercial gasoline injector, were ignited by using a pair of glow plugs, while the initial chamber pressure was varied from 1 bar to 7 bar. The nature of the combustion processes at various initial pressures was elucidated by measuring the pressure rise as well as using FTIR spectroscopy of the combustion products, and high speed photography. The Maximum differential pressures reached during combustion were found to increase with chamber pressure up to 4 bar, and decrease thereafter while the ignition delays were found to be in the order of 10 ms for all pressures. The global equivalence ratio was found to vary from 0.43 at an initial pressure of 1 bar to 0.06 at an initial pressure of 7 bar, thus reducing the flame temperatures achieved within the chamber with increasing chamber pressures. The trends observed in the calculated heat release rates, cumulative heat released, and rate of heat loss from the chamber were found to provide key insights into the combustion process, which was concluded to be occurring through three distinct processes - turbulent premixed combustion, turbulent spray combustion, and turbulent film combustion. The effects of decreasing flame temperatures on the three processes were discussed in detail. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T12:55:42Z
2016-01-14T12:55:42Z
2015
 
Type Article
 
Identifier APPLIED THERMAL ENGINEERING, 76,462-474
1359-4311
http://dx.doi.org/10.1016/j.applthermaleng.2014.11.043
http://dspace.library.iitb.ac.in/jspui/handle/100/17551
 
Language en