Study of Unsteady Swirling Flow in a Hydrodynamic Vortex Chamber
The paper reports on the results of experimental and
numerical study of nonstationary swirling flow in an isothermal
model of vortex burner. It has been identified that main source of the
instability is related to a precessing vortex core (PVC) phenomenon.
The PVC induced flow pulsation characteristics such as precession
frequency and its variation as a function of flowrate and swirl number
have been explored making use of acoustic probes. Additionally
pressure transducers were used to measure the pressure drops on the
working chamber and across the vortex flow. The experiments have
been included also the mean velocity measurements making use of a
laser-Doppler anemometry. The features of instantaneous flowfield
generated by the PVC were analyzed employing a commercial CFD
code (Star-CCM+) based on Detached Eddy Simulation (DES)
approach. Validity of the numerical code has been checked by
comparison calculated flowfield data with the obtained experimental
results. It has been confirmed particularly that the CFD code applied
correctly reproduces the flow features.
[1] K. Gupta, D. G. Lilley, N. Syred, Swirl Flows. Abacus Press, 1984.
[2] E. C. Fernandes, M. V. Heitor, S. I. Shtork, "An analysis of unsteady
highly turbulent swirling flow in a model vortex combustor,"
Experiments in Fluids, vol. 40, no. 2, pp. 177-187, Feb. 2006.
[3] N. Syred, "A review of oscillation mechanisms and the role of the
precessing vortex core (PVC) in swirl combustion systems," Progress in
Energy and Combustion. Science, vol. 32(2), pp. 93-161, Apr. 2006.
[4] S. V. Alekseenko, P. A. Kuibin, V. L. Okulov, Theory of Concentrated
Vortices: An Introduction. Springer, 2007.
[5] S. I. Shtork, C. E. Cala, E. C. Fernandes, "Experimental characterization
of rotating flow field in a model vortex burner," Experimental Thermal
and Fluid Science, vol. 31, pp. 779-788, July 2007.
[6] F. Martinelli, F. Cozzi, A. Coghe, "Phase-locked analysis of velocity
fluctuation in a turbulent free swirling jet after vortex breakdown,"
Experiments in Fluids, vol. 53, pp. 437-449, Aug. 2012.
[7] P. R. Spalart, "Detached Eddy Simulation," Annual Review of Fluid
Mechanics, vol. 41, pp. 181-202, Jan. 2009.
[8] J. Paik, F. Sotiropoulos, "Numerical simulation of strongly swirling
turbulent flows through an abrupt expansion," International Journal of
Heat and Fluid Flow, vol. 31, pp. 390-400, June 2010.
[9] J. Jeong, F. Hussain, "On the identification of a vortex," Journal of
Fluid Mechanics, vol. 285, pp. 69-94, Feb. 1995.
[1] K. Gupta, D. G. Lilley, N. Syred, Swirl Flows. Abacus Press, 1984.
[2] E. C. Fernandes, M. V. Heitor, S. I. Shtork, "An analysis of unsteady
highly turbulent swirling flow in a model vortex combustor,"
Experiments in Fluids, vol. 40, no. 2, pp. 177-187, Feb. 2006.
[3] N. Syred, "A review of oscillation mechanisms and the role of the
precessing vortex core (PVC) in swirl combustion systems," Progress in
Energy and Combustion. Science, vol. 32(2), pp. 93-161, Apr. 2006.
[4] S. V. Alekseenko, P. A. Kuibin, V. L. Okulov, Theory of Concentrated
Vortices: An Introduction. Springer, 2007.
[5] S. I. Shtork, C. E. Cala, E. C. Fernandes, "Experimental characterization
of rotating flow field in a model vortex burner," Experimental Thermal
and Fluid Science, vol. 31, pp. 779-788, July 2007.
[6] F. Martinelli, F. Cozzi, A. Coghe, "Phase-locked analysis of velocity
fluctuation in a turbulent free swirling jet after vortex breakdown,"
Experiments in Fluids, vol. 53, pp. 437-449, Aug. 2012.
[7] P. R. Spalart, "Detached Eddy Simulation," Annual Review of Fluid
Mechanics, vol. 41, pp. 181-202, Jan. 2009.
[8] J. Paik, F. Sotiropoulos, "Numerical simulation of strongly swirling
turbulent flows through an abrupt expansion," International Journal of
Heat and Fluid Flow, vol. 31, pp. 390-400, June 2010.
[9] J. Jeong, F. Hussain, "On the identification of a vortex," Journal of
Fluid Mechanics, vol. 285, pp. 69-94, Feb. 1995.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:58456", author = "Sergey I. Shtork and Aleksey P. Vinokurov and Sergey V. Alekseenko", title = "Study of Unsteady Swirling Flow in a Hydrodynamic Vortex Chamber", abstract = "The paper reports on the results of experimental and
numerical study of nonstationary swirling flow in an isothermal
model of vortex burner. It has been identified that main source of the
instability is related to a precessing vortex core (PVC) phenomenon.
The PVC induced flow pulsation characteristics such as precession
frequency and its variation as a function of flowrate and swirl number
have been explored making use of acoustic probes. Additionally
pressure transducers were used to measure the pressure drops on the
working chamber and across the vortex flow. The experiments have
been included also the mean velocity measurements making use of a
laser-Doppler anemometry. The features of instantaneous flowfield
generated by the PVC were analyzed employing a commercial CFD
code (Star-CCM+) based on Detached Eddy Simulation (DES)
approach. Validity of the numerical code has been checked by
comparison calculated flowfield data with the obtained experimental
results. It has been confirmed particularly that the CFD code applied
correctly reproduces the flow features.", keywords = "Acoustic probes, detached eddy simulation (DES),
laser-Doppler anemometry (LDA), precessing vortex core (PVC).", volume = "6", number = "12", pages = "2776-4", }