Development of planar mesoscale combustor with double narrow slit flame holder and various aspect ratios for micropower generator
DOI:
https://doi.org/10.15587/1729-4061.2019.155663Keywords:
flame stability limit, wall temperature, aspect ratio, double narrow slit flame holder, planar mesoscale combustorAbstract
We have investigated the effects of the aspect ratio of the rectangular mesoscale combustor with a narrow slit flame holder on the flame stability limit, flame behavior and uniformity of combustor wall temperature. The combustor was made of copper with a cross-section area of 6 mm2. The combustor aspect ratio (AR) was varied as 1, 1.5, 2.67, and 6. LPG and pure oxygen were premixed and the experiment was conducted at a limited flow rate. Pure oxygen is selected as an oxidizing agent with the intention of revealing in detail the range of flame stability within a very narrow quenching distance. All observed flames were inside the combustion chamber, not outside the channel. This research used a new type of flame holder namely double narrow slit flame holder as a flame stabilizer. The flame holder with double slit and a kind of bluff body in the center helps recirculate the flow and prolong the residence time to make the flame more stable. The use of double narrow slit flame holder successfully extended the stability map to a very lean equivalence ratio (f). However, there was a dead zone near stoichiometry condition due to very high flame propagation speed. Aspect ratio had an important role for the non-circular combustor. The aspect ratio gave a great effect to determine the limit of the stability map that can be achieved at the rich mixture. The combustor with AR=1.5 had the widest range of flammability limit, while AR=6 hadthe narrowestflame stability limits. However, the latter reached the most uniform wall temperature, which is important to obtain high efficiency thermal to electric energy conversion. The results of this study can be used to determine the right fuel mixture on the mesoscale combustor as a heat source on the micro power generator/thermal electric systemReferences
- Chou, S. K., Yang, W. M., Chua, K. J., Li, J., Zhang, K. L. (2011). Development of micro power generators – A review. Applied Energy, 88 (1), 1–16. doi: https://doi.org/10.1016/j.apenergy.2010.07.010
- Ju, Y., Maruta, K. (2011). Microscale combustion: Technology development and fundamental research. Progress in Energy and Combustion Science, 37(6), 669–715. doi: https://doi.org/10.1016/j.pecs.2011.03.001
- Li, J., Chou, S. K., Li, Z. W., Yang, W. M. (2009). A potential heat source for the micro-thermophotovoltaic (TPV) system. Chemical Engineering Science, 64 (14), 3282–3289. doi: https://doi.org/10.1016/j.ces.2009.04.005
- Akram, M., Minaev, S., Kumar, S. (2013). Investigations on the Formation of Planar Flames in Mesoscale Divergent Channels and Prediction of Burning Velocity at High Temperatures. Combustion Science and Technology, 185 (4), 645–660. doi: https://doi.org/10.1080/00102202.2012.739224
- Zhou, J., Wang, Y., Yang, W., Liu, J., Wang, Z., Cen, K. (2009). Improvement of micro-combustion stability through electrical heating. Applied Thermal Engineering, 29 (11-12), 2373–2378. doi: https://doi.org/10.1016/j.applthermaleng.2008.12.005
- Zhong, B.-J., Wang, J.-H. (2010). Experimental study on premixed CH4/air mixture combustion in micro Swiss-roll combustors. Combustion and Flame, 157 (12), 2222–2229. doi: https://doi.org/10.1016/j.combustflame.2010.07.014
- Li, J., Chou, S. K., Li, Z. W., Yang, W. M. (2010). Experimental investigation of porous media combustion in a planar micro-combustor. Fuel, 89 (3), 708–715. doi: https://doi.org/10.1016/j.fuel.2009.06.026
- Li, J., Huang, J., Chen, X., Yan, M., Zhao, D., Wei, Z., Wang, N. (2017). Experimental Study on Flame Stability and Thermal Performance of an n-Heptane-Fueled Microscale Combustor. Combustion Science and Technology, 189 (7), 1198–1215. doi: https://doi.org/10.1080/00102202.2017.1279154
- Wang, W.-C., Hung, C.-I., Chao, Y.-C. (2013). Numerical and Experimental Studies of Mixing Enhancement and Flame Stabilization in a Meso-Scale TPV Combustor With a Porous-Medium Injector and a Heat-Regeneration Reverse Tube. Heat Transfer Engineering, 35 (4), 336–357. doi: https://doi.org/10.1080/01457632.2013.810968
- Yuliati, L., Seo, T., Mikami, M. (2012). Liquid-fuel combustion in a narrow tube using an electrospray technique. Combustion and Flame, 159 (1), 462–464. doi: https://doi.org/10.1016/j.combustflame.2011.06.010
- Mikami, M., Maeda, Y., Matsui, K., Seo, T., Yuliati, L. (2013). Combustion of gaseous and liquid fuels in meso-scale tubes with wire mesh. Proceedings of the Combustion Institute, 34 (2), 3387–3394. doi: https://doi.org/10.1016/j.proci.2012.05.064
- Baigmohammadi, M., Tabejamaat, S., Farsiani, Y. (2015). Experimental study of the effects of geometrical parameters, Reynolds number, and equivalence ratio on methane–oxygen premixed flame dynamics in non-adiabatic cylinderical meso-scale reactors with the backward facing step. Chemical Engineering Science, 132, 215–233. doi: https://doi.org/10.1016/j.ces.2015.04.008
- Faramarzpour, H., Mazaheri, K., Alipoor, A. (2018). Effect of backward facing step on radiation efficiency in a micro combustor. International Journal of Thermal Sciences, 132, 129–136. doi: https://doi.org/10.1016/j.ijthermalsci.2018.06.002
- Wan, J., Fan, A., Liu, Y., Yao, H., Liu, W., Gou, X., Zhao, D. (2015). Experimental investigation and numerical analysis on flame stabilization of CH 4 /air mixture in a mesoscale channel with wall cavities. Combustion and Flame, 162 (4), 1035–1045. doi: https://doi.org/10.1016/j.combustflame.2014.09.024
- Evans, C. J., Kyritsis, D. C. (2011). Experimental Investigation of the Effects of Flame Phenomenology on the Wall Temperature Distribution of Mesoscale Nonadiabatic Ducts. Combustion Science and Technology, 183 (9), 847–867. doi: https://doi.org/10.1080/00102202.2011.567199
- Adiwidodo, S., Wardana, I. N. G., Yuliati, L., Sasongko, M. N. (2016). Flame Stability Measurement on Rectangular Slot Meso-Scale Combustor. Applied Mechanics and Materials, 836, 271–276. doi: https://doi.org/10.4028/www.scientific.net/amm.836.271
- Taamallah, S., LaBry, Z. A., Shanbhogue, S. J., Ghoniem, A. F. (2015). Thermo-acoustic instabilities in lean premixed swirl-stabilized combustion and their link to acoustically coupled and decoupled flame macrostructures. Proceedings of the Combustion Institute, 35 (3), 3273–3282. doi: https://doi.org/10.1016/j.proci.2014.07.002
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2019 Satworo Adiwidodo, I Nyoman Gede Wardana, Lilis Yuliati, Mega Nur Sasongko
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
