Investigation of Isothermal Flow inside a New Combustor with Two-Stage Axial Swirler

Document Type : Regular Article


1 Institute for Energy Research of Jiangsu University, Zhenjiang, 212013, China

2 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China

3 Combustion Environment Research Centre, 70023, Italy



Experiments and numerical simulations are performed to study the cold flow field characteristics in a two-stage axial swirl combustion chamber. Large eddy simulation with dynamic turbulent kinetic energy sub-grid scale model is used to calculate the flow field, and particle image velocimetry is used to measure the turbulent flow field. The calculated results are found to be in a good agreement with the experiment results. Due to the shear layers and the density difference between CO2 and air flows, the central recirculation zone appears. With the increase of the ratio of flow velocity between inner and outer tubes, the central recirculation zone shrinks gradually, while the length and range of the angular recirculation zone increase continuously. The vortex structure develops in the axial and radial directions, and the vortex breakdown mostly occurs in the upstream regions. However, outside the central recirculation zone, only one shear layer is observed, and its vortex structure is almost extended up to the exit of the combustion chamber. In addition, precession vortex core is not seen in all the conditions.


Adawy, M. E., M. R. Heikal, A. Aziz, S. Munir and M. I. Siddiqui (2018). Effect of boost pressure on the in-cylinder tumble-motion of gdi engine under steady-state conditions using stereoscopic-piv. Journal of Applied Fluid Mechanics 11(3), 733-742.##
Archer, S. and A. Gupta (2004). The Role of Confinement on Flow Dynamics Under Fuel Lean Combustion Conditions, International Energy Conversion Engineering Conference.##
Arthur, K. (2018). Porous media flow transitioning into the forchheimer regime: a piv study. Journal of Applied Fluid Mechanics 11(2), 297-307.##
Beer, J. M. and N. A. Chigier (1972). Combustion Aerodynamics. London: Applied Science Publishers Ltd.##
Cai, J., S. M. Jeng and R. Tacina (2005) The Structure of a Swirl-Stabilized Reacting Spray Issued from an Axial Swirler, 43rd AIAA Aerospace Sciences Meeting and Exhibit.##
Canepa, E., P. D. Martino, P.  Formosa, M. Ubaldi and P. Zunino (2006). Unsteady aerodynamics of an aeroengine double swirler lean premixing prevaporizing burner. Journal of Engineering for Gas Turbines & Power 128(1), 29-39.##
Eldrainy, Y. A., K. M. Saqr, H. S. Aly, T. M. Lazim and M. N. M. Jaafar (2011). Large eddy simulation and preliminary modeling of the flow downstream a variable geometry swirler for gas turbine combustors. International Communications in Heat & Mass Transfer 38(8), 1104-1109.##
El-Kady, A., S. M. Jeng and H. Mongia (2005). Experimental Investigation of Temperature and Species Concentrations Characteristics of Swirling Spray Combustion, 43rd AIAA Aerospace Sciences Meeting and Exhibit.##
El-Kady, A., S. M. Jeng and H. Mongia (2006). The Influence of Primary Air Jets on Flow and Pollutant Emissions Characteristics within a Model Gas Turbine Combustor, 44th AIAA Aerospace Sciences Meeting and Exhibit.##
Murakami, E. and D. Papamoschou. (2002). Mean flow development in dual-stream compressible jets. AIAA Journal 40(6), 1131-1138.##
Hadef, R. and B. Lenze (2008). Effects of co- and counter-swirl on the droplet characteristics in a spray flame. Chemical Engineering & Processing Process Intensification 47(12), 2209-2217.##
Houben, J., C. Weiss, E. Brunnmair and S. Pirker (2016). Cfd simulations of pressure drop and velocity field in a cyclone separator with central vortex stabilization rod. Journal of Applied Fluid Mechanics.##
Huang, Y. and V. Yang (2005). Effect of swirl on combustion dynamics in a lean-premixed swirl-stabilized combustor. Proceedings of the combustion institute 30(2), 1775-1782.##
Jeong, J. and F. Hussain (1995). On the identification of a vortex. Journal of Fluid Mechanics 332(1), 339-363.##
Kim, H. S., V. K. Arghode and A. K. Gupta (2009). Flame characteristics of hydrogen-enriched methane–air premixed swirling flames. International Journal of Hydrogen Energy 34(2), 1063-1073.##
Kim, J. C., K. H. Yoo and H. G. Sung (2011). Large-eddy simulation and acoustic analysis of a turbulent flow field in a swirl-stabilized combustor. Journal of Mechanical Science and Technology 25(10), 2703-2710.##
Kolá, V. and J. ístek (2015). Corotational and compressibility aspects leading to a modification of the vortex-identification q-criterion. Aiaa Journal 53(8), 1-5.##
Kunnen, R. P. J., H. J. H. Clercx, and B. J. Geurts (2010). Vortex statistics in turbulent rotating convection. Physical Review E 82(3), 1-12.##
Lu, X., S. Wang, H. G. Sung, S. Y. Hsieh and V. Yang (2005). Large-eddy simulations of turbulent swirling flows injected into a dump chamber. Journal of Fluid Mechanics 527, 171-195.##
Manikandan, R., R. Sadanandan and C. Prathap (2020). Experimental investigation on the effects of swirl on the exit turbulent flow field of an unconfined annular burner at isothermal and reacting conditions. Journal of Applied Fluid Mechanics 13(3), 839-847.##
Raj, R. T. K. and V. Ganesan (2008). Study on the effect of various parameters on flow development behind vane swirlers. International Journal of Thermal Sciences 47(9), 1204-1225.##
Reddy, A. P., R. I. Sujith and S. R. Chakravarthy (2006). Swirler Flow Field Characteristics in a Sudden Expansion Combustor Geometry. Journal of Propulsion & Power 22(4), 800-808.##
Ribeiro, M. M. and J. H. Whitelaw (1980).Coaxial jets with and without swirl. Journal of Fluid Mechanics.##
Stopper, U., M. Aigner, W. Meier, R. Sadanandan and I. S. Kim (2009). Flow Field and Combustion Characterization of Premixed Gas Turbine Flames by Planar Laser Techniques. Journal of Engineering for Gas Turbines and Power 131(2), 32-39.##
Tiwari, P., Z. Xia and X. Han (2020). Comparison of vles and les turbulence modeling for swirling turbulent flow. Journal of Applied Fluid Mechanics 13(4), 1107-1116.##
Vashahi, F., S. Lee and J. Lee (2017a). Experimental and Computational Analysis of the Swirling Flow Generated by an Axial Counter-Rotating Swirler in a Rectangular Model Chamber Using Water Test Rig, Journal of Engineering for Gas Turbines and Power: Transactions of the ASME 139 (8).##
Vashahi, F., B. J. Baek and J. Lee (2017b). An experimental and LES comparison of water- and air-based swirling flow test rigs in vertical and horizontal configurations, Journal of Mechanical Science and Technology 31 (7), 3285-3295.##
Warda, H. A., S. Z. Kassab, K. A. Elshorbagy and E. A. Elsaadawy (1999). An experimental investigation of the near-field region of free turbulent round central and annular jets. Flow Measurement & Instrumentation 10(1), 1-14.##
Westerweel, J., G. E. Elsinga, and R. J. Adrian (2013). Particle image velocimetry for complex and turbulent flows. Annual Review of Fluid Mechanics 45(1), 409.##
Wu, Y., C. Carlsson, R. Szasz, L. Peng, L. Fuchs, X. S. Bai (2016). Effect of geometrical contraction on vortex breakdown of swirling turbulent flow in a model combustor. Fuel 170, 210-225.##
Yang, Y. (2012). Large-eddy simulations of the non-reactive flow in the Sydney swirl burner. International Journal of Heat and Fluid Flow 36, 47-57.##
Zhao, J. L., H. J. Wang, R. Z. Gong, T. Xuan and X. Y. Li (2014). Vortex structure research method based on Q-criterion in a high-speed centrifugal pump. 6th International Symposium on Fluid Machinery and Fluid Engineering.##