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Droplet combustion studies of hydrocarbon-monopropellant blends

DSpace at IIT Bombay

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Title Droplet combustion studies of hydrocarbon-monopropellant blends
 
Creator AMBEKAR, A
CHOWDHURY, A
CHALLA, S
RADHAKRISHNA, D
 
Subject Isopropyl nitrate
Blend
Dibutyl sebacate
Droplet combustion
Micro-explosion
INITIAL DIAMETER
CONVECTION
DECOMPOSITION
ENVIRONMENT
PRESSURE
FUELS
EVAPORATION
KINETICS
SPHERES
WIRES
 
Description An experimental investigation was conducted to characterize the monopropellant droplet combustion of pure and blended isopropyl nitrate (IPN), suspended on quartz fibers in a quiescent atmosphere. The blends were prepared by mixing varying percentages by weight of IPN with less viscous n-heptane, as well as highly viscous desensitizer dibutyl sebacate (DBS). Ignition was achieved by using a heated 60 mu m Nichrome wire. The dependence of the burning rate constant of pure IPN on initial droplet diameter was investigated in the droplet size range of 0.79-1.97 mm. The blended IPN studies were carried out with initial droplet diameters of 2 and 1.5 mm for IPN-n-heptane and IPN-DBS blends respectively, to characterize the effect of gravimetric composition. The experiments revealed a strong dependence of IPN burning rate on droplet size. The IPN-DBS blends were characterized by severe micro-explosions, further atomizing the droplet, governed by the preferential evaporation of IPN over DBS. However, micro-explosions were conspicuously absent in case of IPN-n-heptane blends due to simultaneous gasification of both components. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T17:24:20Z
2014-12-28T17:24:20Z
2014
 
Type Article
 
Identifier FUEL, 115697-705
0016-2361
1873-7153
http://dx.doi.org/10.1016/j.fuel.2013.07.056
http://dspace.library.iitb.ac.in/jspui/handle/100/16981
 
Language English