On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition
Abstract
The burning characteristics of a biodiesel droplet mixed with diesel or alkanes such as dodecane and hexadecane were experimentally studied in a reduced-gravity environment so as to create a spherically symmetrical flame without the influence of natural convection due to buoyancy. Small droplets on the order of 500 {mu}m in diameter were initially injected via a piezoelectric technique onto the cross point intersected by two thin carbon fibers; these were prepared inside a combustion chamber that was housed in a drag shield, which was freely dropped onto a foam cushion. It was found that, for single component droplets, the tendency to form a rigid soot shell was relatively small for biodiesel fuel as compared to that exhibited by the other tested fuels. The soot created drifted away readily, showing a puffing phenomenon; this could be related to the distinct molecular structure of biodiesel leading to unique soot layers that were more vulnerable to oxidative reactivity as compared to the soot generated by diesel or alkanes. The addition of biodiesel to these more traditional fuels also presented better performance with respect to annihilating the soot shell, particularly for diesel. The burning rate generally follows that of multi-component fuels, by some meansmore »
- Authors:
-
- Department of Mechanical Engineering, National Taiwan University, Taipei 10617 (China)
- Publication Date:
- OSTI Identifier:
- 21227396
- Resource Type:
- Journal Article
- Journal Name:
- Combustion and Flame
- Additional Journal Information:
- Journal Volume: 156; Journal Issue: 10; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; DIESEL FUELS; DODECANE; HEXADECANE; BIOFUELS; SOOT; COMBUSTION; DROPLETS; SHELLS; CARBON FIBERS; MIXTURES; COMBUSTION CHAMBERS; MOLECULAR STRUCTURE; NONLINEAR PROBLEMS; FLAMES; LAYERS; PERFORMANCE; Microgravity
Citation Formats
Pan, Kuo-Long, Li, Je-Wei, Chen, Chien-Pei, and Wang, Ching-Hua. On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition. United States: N. p., 2009.
Web. doi:10.1016/J.COMBUSTFLAME.2009.07.020.
Pan, Kuo-Long, Li, Je-Wei, Chen, Chien-Pei, & Wang, Ching-Hua. On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition. United States. https://doi.org/10.1016/J.COMBUSTFLAME.2009.07.020
Pan, Kuo-Long, Li, Je-Wei, Chen, Chien-Pei, and Wang, Ching-Hua. 2009.
"On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition". United States. https://doi.org/10.1016/J.COMBUSTFLAME.2009.07.020.
@article{osti_21227396,
title = {On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition},
author = {Pan, Kuo-Long and Li, Je-Wei and Chen, Chien-Pei and Wang, Ching-Hua},
abstractNote = {The burning characteristics of a biodiesel droplet mixed with diesel or alkanes such as dodecane and hexadecane were experimentally studied in a reduced-gravity environment so as to create a spherically symmetrical flame without the influence of natural convection due to buoyancy. Small droplets on the order of 500 {mu}m in diameter were initially injected via a piezoelectric technique onto the cross point intersected by two thin carbon fibers; these were prepared inside a combustion chamber that was housed in a drag shield, which was freely dropped onto a foam cushion. It was found that, for single component droplets, the tendency to form a rigid soot shell was relatively small for biodiesel fuel as compared to that exhibited by the other tested fuels. The soot created drifted away readily, showing a puffing phenomenon; this could be related to the distinct molecular structure of biodiesel leading to unique soot layers that were more vulnerable to oxidative reactivity as compared to the soot generated by diesel or alkanes. The addition of biodiesel to these more traditional fuels also presented better performance with respect to annihilating the soot shell, particularly for diesel. The burning rate generally follows that of multi-component fuels, by some means in terms of a lever rule, whereas the mixture of biodiesel and dodecane exhibits a somewhat nonlinear relation with the added fraction of dodecane. This might be related to the formation of a soot shell. (author)},
doi = {10.1016/J.COMBUSTFLAME.2009.07.020},
url = {https://www.osti.gov/biblio/21227396},
journal = {Combustion and Flame},
issn = {0010-2180},
number = 10,
volume = 156,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2009},
month = {Thu Oct 15 00:00:00 EDT 2009}
}