The Effect of Velocity in High Swirling Flow in Unconfined Burner
DOI:
https://doi.org/10.11113/jt.v69.3321Keywords:
Burner, swirling flow, axial velocity, tangential velocity, standard k-εAbstract
This paper presents a numerical simulation of swirling turbulent flows in combustion chamber of unconfined burner. Isothermal flows with three different swirl numbers using axial swirler are used to demonstrate the effect of flow in axial velocity and tangential velocity on the center recirculation zone. The significance of center recirculation zone is to ensure a good mixing of air and fuel in order to get a better combustion. The inlet velocity, U0 is 30 m/s entering into the burner through the axial swirler that is represents a high Reynolds number. A numerical study of non-reacting flow in the burner region is performed using ANSYS Fluent. The Reynolds–Averaged Navier–Stokes (RANS) standard k-ε turbulence approach method was applied with the eddy dissipation model. The paper focuses the flow field behind the axial swirler downstream that determined by transverse flow field at different on radial distances. The results of axial and tangential velocity were normalized with the inlet velocity. The velocity profiles are different after undergoing the different swirler up to the burner exit. However, the results of velocity profile showed that the high SN gives a better swirling flow patterns.Â
References
Mohd Jaafar, M. N., Jusoff, K., Osman, M. S., and Ishak, M. S. A. 2011. Combustor Aerodynamics Using Radial Swirler. International Journal of Physics Sciences. 6(13): 3091–3098.
Ridluan, A., Eiamsa-ard, S., and Promvonge, P. 2007. Numerical Simulation of 3D Turbulent Isothermal Flow in a Vortex Combustor. International Communication in Heat and Mass Transfer. 34: 860–869.
Litvinov, I. V., Shtork, S. I., Kuibin, P. A., Alekseenko, S. V., and Hanjalic, K. 2013. Experimental Study and Analytical Reconstruction of Processing Vortex in a Tangential Swirler. International Journal of Heat and Fluid Flow. 42: 251–264.
Syred, N., and Beer, J. M. 1974. Combustion in Swirling Flows: A Review. Combustion and Flame. 23: 143–201.
Sloan, D. G., Smith, P. J., and Smoot, L. D. 1986. Modeling of Swirl in Turbulent Flow Systems. Prog. Energy Combustion Science. 12: 163–250.
Eldrainy, Y. A., Mohd Jaafar, M. N., and Mat Lazim, T. 2008. Numerical Investigation of the Flow Inside Primary Zone of Tubular Combustor Model. Jurnal Mekanikal. 26: 162–176.
Yegian, D. T., and Cheng, R. K. 1998. Development of a Vane-swirler for Use in a Low Nox Weak-Swirl Burner. Combust. Sci. Technol. 139(1–6): 207–227.
Launder, B. E., and Spalding, D. B. 1974. The Numerical Computation of Turbulent Flows. Computer Methods in Applied Mechanics and Engineering. 3: 269–289.
Eldrainy, Y. A., Saqr, K. M. Aly, H. S., and Mohd Jaafar, M. N. 2009. CFD Insight of the Flow Dynamics in a Novel Swirler for Gas Turbine Combustors. International Communications in Heat and Mass Transfer. 36: 936–941.
Khalil, A. E. E. and Gupta, A. K. 2011. Distributed Swirl Combustion for Gas Turbine Application. Applied Energy. 88: 4898–4907.
Orbay, R. C., Nogenmyr, K. J., Klingmann, J., and Bai, X. S. 2013. Swirling Turbulent Flows in a Combustion Chamber with and Without Heat Release. Fuel. 104: 133–146.
Pollard, A., Ozem, H. L. M., and Grandmaison, E. W. 2005. Turbulent, Swirling Flow Over an Asymmetric Constant Radius Surface. Experimental Thermal and Fluid Science. 29: 493–509.
Beltagui, S. A., Kenbar, A. M. A., and Maccallum, N. R. L. 1993. Comparison of Measured Isothermal and Combusting Confined Swirling Flows: Peripheral Fuel Injection. Experimental Thermal and Fluid Science. 6: 147–156.
Murphy, S., Delfos, R., Pourquie, M. J. B. M., Olujic, Z., Jansens, P. J., and Nieuwstadt, F. T. M. 2007. Prediction of Strongly Swirling Flow within an Axial Hydrocyclone Using Two Commercial CFD Codes. Chemical Engineering Science. 62: 1619–1635.
Syred, N., Abdulsada, M., Griffiths, A., Doherty, T.O., and Bowen. 2012. The Effect of Hydrogen Containing Fuel Blends Upon Flashback in Swirl Burners. Applied Energy. 89: 106–110.
Grech, N., Koupper, C., Zachos, P.K., Pachidis, V., and Singh, R. 2012. Consideration on the Numerical Modeling and Performance of Axial Swirlers Under Relight Conditions. Journal of Engineering for Gas Turbines and Power.
Datta, A., and Som, S. K. 1999. Combustion and Emission Characteristics in a Gas Turbine Combustor at Different Pressure and Swirl Conditions. Applied Thermal Engineering. 19: 949–967.
Xia, J. L., Yadigaroglu, G., Liu, Y.S., Schmidli, J., and Smith, B. L. 1998. Numerical and Experimental Study of Swirling Flow in a Model. Int. Journal Heat Mass Transfer. 41(11): 1485–1497.
Raj, R. T. K., and Ganesan, V. 2008. Study on the Effect of Various Parameters on Flow Development Behind Vane Swirlers. International Journal of Thermal Sciences. 47: 1204–1225.
Al-Abdeli, Y. M., and Masri, A. R. 2003. Recirculation and Flowfield Regimes of Unconfined Non-reacting Swirling Flows. Experimental Thermal and Fluid Scienc. 27: 655–665.
Zhuowei, L., Kharoua, N., Redjem, H., and Khezzar, L. 2012. RANS and LES Simulation of a Swirling Flow in a Combustion Chamber With Different Swirl Intensities. Proceeding of CHT-12, ICHMT International Symposium on Advances in Computational Heat Transfer.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
