Record Details

On the formation of spinning flames and combustion completeness for premixed fuel-air mixtures in stepped tube microcombustors

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title On the formation of spinning flames and combustion completeness for premixed fuel-air mixtures in stepped tube microcombustors
 
Creator DESHPANDE, AA
KUMAR, S
 
Subject Microcombustion
Spinning flames
CO emissions
Flame stability limits
SWISS-ROLL COMBUSTORS
RADIAL MICROCHANNELS
MICRO
STABILIZATION
STABILITY
CHANNEL
 
Description Various premixed fuel-air mixtures are introduced in stepped tube microcombustors. The experimental investigations show the formation of various steady and unsteady spinning flame propagation modes for a range of flow rates and mixture ratio conditions due to thermal-wall coupling. The spinning flames of very high frequency, similar to 150 Hz have been observed for the first time with various fuel-air mixtures. The spinning frequency of these flames is almost twice that of flames observed in earlier work. The spinning flames were observed for both lean and rich mixtures of methane-, LPG- and propane-air mixtures. The formation of these spinning flames depends on the mixture flow rate, equivalence ratio and number of steps in the microcombustor. Exhaust gas analysis was carried out for different operating conditions. It was observed that contrary to general perception of low combustion efficiency and high CO emissions associated with such rotating and spinning flames, these high frequency spinning flames led to complete combustion with almost zero CO emissions. (c) 2012 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T14:41:19Z
2014-10-16T14:41:19Z
2013
 
Type Article
 
Identifier APPLIED THERMAL ENGINEERING, 51(1-2)91-101
http://dx.doi.org/10.1016/j.applthermaleng.2012.09.013
http://dspace.library.iitb.ac.in/jspui/handle/100/15810
 
Language en