Abstract
In a micro combustor, various vortices can enhance the wall heat transfer rate and get the best combustion. For an efficient combustion, the swirler of micro fan type is introduced for a micro combustor. In general, the swirling flows can change significantly the wall heat fluxes and this feature is sensitively varied by the fan configuration. So, to examine the geometric effect of fan swirler on the combustion characteristics, reacting flows depending on six blade angles are numerically investigated. The highest efficiency and heat loss related to vortical flows are observed for the specific blade angles.
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Abbreviations
- A i :
-
Surface area of combustion chamber, m2
- D :
-
Combustor diameter, m
- D f :
-
Fuel hole diameter, m
- D o :
-
Outer wall diameter, m
- q i :
-
Wall heat flux, W/m2
- \(\dot{m}_{{CH_{4} }}^{inlet}\) :
-
CH4 mass flow rate of inlet, kg/s
- LHV :
-
Lower heating value of methane, kJ/kg
- T :
-
Temperature
- U :
-
Streamwise velocity, m/s
- U c :
-
Streamwise velocity at center axis, m/s
- Z :
-
Mixture fraction
- Z st :
-
Stoichiometric mixture fraction
- ν t :
-
Kinematic viscosity
- ϕ G :
-
Global equivalence ratio
- θ :
-
Blade angle, degree
References
J. Li, S.K. Chou, Z.W. Li, W.M. Yang, A potential heat source for the micro-thermophotovoltaic (TPV) system. Chem. Eng. Sci. 64, 3282–3289 (2009)
W.M. Yang, D.Y. Jiang, S.K. Chou, K.J. Chua, K. Karthikeyan, H. An, Experimental stud on micro modular combustor for micro-thermophotovoltaic system application. Int. J. Hydrogen Energy 37, 9576–9583 (2012)
S.K. Chou, W.M. Yang, K.J. Chua, J. Li, K.L. Zhang, Development of micro power generators—a review. Appl. Energy 88, 1–16 (2011)
Y.A. Eldrainy, K.M. Saqr, H.S. Aly, M.N.M. Jaafar, CFD insight of the flow dynamics in a novel swirler for gas turbine combustor. Int. Commun. Heat Mass Transf. 36, 936–941 (2009)
M. Khaleghi, S.E. Hosseini, M.A. Wahid, Vortex combustion and heat transfer in meso-scale with thermal recuperation. Int. Commun. Heat Mass Transf. 66, 250–258 (2015)
A.C. Benim, S. Iqbal, W. Meier, F. Joos, A. Wiedermann, Nemerical investigation of turbulent swirling flames with validation in gas turbine model combustor. Appl. Therm. Eng. 110, 202–212 (2017)
Y. Yahagi, M. Sekiguti, K. Suzuki, Flow structure and flame stability in a micro, can combustor with a baffle plate. Appl. Therm. Eng. 27, 788–794 (2007)
H.S. Choi, K. Nakabe, K. Suzuki, Y. Katsumoto. An experimental investigation of mixing and combustion characteristics on the can-type micro combustor with a multi-jet baffle plate, in IUTAM symposium on turbulent mixing and combustion, vol. 70 (Springer, Dordrecht, 2002), pp. 367–37
W.H. Kim, T.S. Park, Effects of noncircular air holes on reacting flow characteristics in a micro can combustor with a seven-hole baffle. Appl. Therm. Eng. 100, 378–391 (2016)
W.H. Kim, T.S. Park, Non-premixed lean flame characteristics depending on air hole positions in a baffled micro combustor. Appl. Therm. Eng. 129, 431–445 (2018)
Fluent Inc, Fluent 6.3 user’s guide (Fluent Inc, Lebanon, 2006)
Y.M. Al-Abdeli, A.R. Masri, Precession and recirculation in turbulent swirling isothermal jets. Combust. Sci. Technol. 176, 645–665 (2004)
S.R. Turns, An introduction to combustion (McGraw-Hill, New York, 1996)
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Kim, W.H., Park, T.S. Effects of blade angle on combustion characteristics in a micro combustor with a swirler of micro fan type. JMST Adv. 1, 65–71 (2019). https://doi.org/10.1007/s42791-019-0002-4
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DOI: https://doi.org/10.1007/s42791-019-0002-4