Dominant Flow Features of Two Inclined Impinging Jets Confined in Large Enclosure
The present study was provided to examine the
vortical structures generated by two inclined impinging jets with
experimental and numerical investigations. The jets are issuing with a
pitch angle α=40° into a confined quiescent fluid. The experimental
investigation on flow patterns was visualized by using olive particles
injected into the jets illuminated by Nd:Yag laser light to reveal the
finer details of the confined jets interaction. It was observed that two
counter-rotating vortex pairs (CVPs) were generated in the near
region. A numerical investigation was also performed. First, the
numerical results were validates against the experimental results and
then the numerical model was used to study the effect of section ratio
on the evolution of the CVPs. Our results show promising agreement
with experimental data, and indicate that our model has the potential
to produce useful and accurate data regarding the evolution of CVPs.
[1] R.J. Margason, "Fifty years of jet in cross flow research. In
Computational and Experimental Assessment of Jets in Cross Flow.
Proceedings of NATO AGARD Conference, CP-534, Winchester, UK.
1993.
[2] T.F. Fric, A. Roshko, "Vortical structure in the wake of a transverse jet,"
Journal of Fluid Mechanics, vol. 279, pp. 1-47, 1993.
[3] L. L.Yuan, R. L. Street, & J. H. Ferziger, "Large-eddy simulations of a
round jet in crossflow," J. Fluid Mech. Vol. 379, pp.71-104, 1999.
[4] B.R. Morton, A. Ibbetson, "Jets deflected in a crossflow," Experimental
Thermal and Fluid Science, vol. 12, pp.112-133, 1996.
[5] J. F. Keffer and W. D. Bains, "The Round turbulent jet in a cross-wind,"
J. Fluid Mech. Vol. 15, pp. 481-496, 1963.
[6] K.B. Mc Grattan. H.R. Baum and R.G. Rehm," Numerical simulation of
smoke plumes from large oil fires," Atmospheric Environment, vol. 30,
pp. 4125-4136, 1996.
[7] R. Fearn, and R.P. Weston, "Vorticity associated with a jet in a
crossflow," AIAA J. vol. 12, pp. 1671-1975, 1666.
[8] M. Gregoric, L.R. Davis, D.J. Bushnell, "An experimental investigation
of merging buoyant jets in a crossflow." ASME J. Heat Transfer, vol.
104, pp. 236-240, 1982.
[9] A.R. Karagozian, T.T. Nguyen, C.N. Kim, "Vortex modeling of single
and multiple dilution jet mixing in a cross flow," J. Propul. Power 2,
354-360, 1986.
RS=12 RS=21 RS=48 RS=133
[10] J.M.M. Barata, D.F.G. Durao, M.V. Heitor, J.J. McGuirk, "Impingement
of single and twin turbulent jets through a crossflow," AIAA J. vol.29,
pp.595-602, 1991.
[11] V. Kolar, H. Takao, T. Todoroki, E. Savory, S. Okamoto, N. Toy,
"Vorticity transport within twin jets in crossflow," Exp. Therm. Fluid
Sci. vol.27, pp.563-571, 2003.
[12] V. Kolar, E. Savory, H. Takao, T. Todoroki, S. Okamoto, N. Toy,
"Vorticity and circulation aspects of twin jets in crossflow for an oblique
nozzle arrangement," IMechE J. Aerospace Eng. Vol.220, pp.247-252,
2006.
[13] V.Kolar, E. Savory, "Dominant flow features of twin jets and plumes in
crossflow," Journal of Wind Engineering and Industrial Aerodynamics
vol."95, pp.1199-1215, 2007.
[14] R.L.J.Fernandes., A. Sobiesiak., A. Pollard., opposit round jets issuing
into a small aspect ratio channel cross flow," Experimental Thermal and
Fluid Science. Vol.13, pp.374-394, 1996.
[15] M. S. Perchanok, D. M. Bruce, I. S. Gartshore, "Velocity measurements
in an isothermal scale model of a hog fuel boiler furnace," J, Pulp Paper
Sci. vol.15, pp.212-219, 1989.
[16] K. S. Chen, J,Y. Hwang, "Experimental study on the mixing of one and
Dual-Line heated jets with a cold crossflow in a confined channel,"
AIAA J, vol.29, pp.353-360, 1991.
[17] Kazuyoshi Nakabe, Elzbieta Fornalik, Jens F. Eschenbacher et al.,
"Ineractions of longitudinal vortices generated by twin inclined jets and
enhancement of impingement heat transfer," International Journal of
heat and fluid flow,vol.22, pp.287-292, 2001.
[18] EH. Mathews, "Numerical solutions of fluid problems related to
buildings, structures and the environment," Building and Environment,
24 (1):1. 1989.
[19] BE. Launder, DB. Spalding, "The numerical computation of turbulent
flows," Computer Methods in Applied Mechanics and Engineering,
vol.3, pp.269-89, 1974.
[20] S. Murakami, "Prediction, analysis and design for indoor climate in
large enclosures," Roomvent -92. In: Proceedings of third international
conference. DANVAK, 1992.
[21] Q. Chen, Z. Jiang, "Significant questions in predicting room air motion,"
ASHRAE Transactions, vol.98(1), pp.929-38, 1992.
[22] PG. Schild, PO. Tjelflaat, D. Aiulfi, "Guidelines for CFD modeling of
atria," ASHRAE Transaction, vol.101(2), pp.1311-29, 1995.
[23] B.Kader, Temperature and concentration profiles in fully turbulent
boundary layers," Int. J.Heat Mass Transfer vol.24, pp.1541-1544, 1993.
[24] M. Wolfstein, "The Velocity and Temperature Distribution of One-
Dimensional Flow with Turbulence Augmentation and Pressure
Gradient," Int. J. Heat Mass Transfer, vol.12, pp.301-318, 1969.
[1] R.J. Margason, "Fifty years of jet in cross flow research. In
Computational and Experimental Assessment of Jets in Cross Flow.
Proceedings of NATO AGARD Conference, CP-534, Winchester, UK.
1993.
[2] T.F. Fric, A. Roshko, "Vortical structure in the wake of a transverse jet,"
Journal of Fluid Mechanics, vol. 279, pp. 1-47, 1993.
[3] L. L.Yuan, R. L. Street, & J. H. Ferziger, "Large-eddy simulations of a
round jet in crossflow," J. Fluid Mech. Vol. 379, pp.71-104, 1999.
[4] B.R. Morton, A. Ibbetson, "Jets deflected in a crossflow," Experimental
Thermal and Fluid Science, vol. 12, pp.112-133, 1996.
[5] J. F. Keffer and W. D. Bains, "The Round turbulent jet in a cross-wind,"
J. Fluid Mech. Vol. 15, pp. 481-496, 1963.
[6] K.B. Mc Grattan. H.R. Baum and R.G. Rehm," Numerical simulation of
smoke plumes from large oil fires," Atmospheric Environment, vol. 30,
pp. 4125-4136, 1996.
[7] R. Fearn, and R.P. Weston, "Vorticity associated with a jet in a
crossflow," AIAA J. vol. 12, pp. 1671-1975, 1666.
[8] M. Gregoric, L.R. Davis, D.J. Bushnell, "An experimental investigation
of merging buoyant jets in a crossflow." ASME J. Heat Transfer, vol.
104, pp. 236-240, 1982.
[9] A.R. Karagozian, T.T. Nguyen, C.N. Kim, "Vortex modeling of single
and multiple dilution jet mixing in a cross flow," J. Propul. Power 2,
354-360, 1986.
RS=12 RS=21 RS=48 RS=133
[10] J.M.M. Barata, D.F.G. Durao, M.V. Heitor, J.J. McGuirk, "Impingement
of single and twin turbulent jets through a crossflow," AIAA J. vol.29,
pp.595-602, 1991.
[11] V. Kolar, H. Takao, T. Todoroki, E. Savory, S. Okamoto, N. Toy,
"Vorticity transport within twin jets in crossflow," Exp. Therm. Fluid
Sci. vol.27, pp.563-571, 2003.
[12] V. Kolar, E. Savory, H. Takao, T. Todoroki, S. Okamoto, N. Toy,
"Vorticity and circulation aspects of twin jets in crossflow for an oblique
nozzle arrangement," IMechE J. Aerospace Eng. Vol.220, pp.247-252,
2006.
[13] V.Kolar, E. Savory, "Dominant flow features of twin jets and plumes in
crossflow," Journal of Wind Engineering and Industrial Aerodynamics
vol."95, pp.1199-1215, 2007.
[14] R.L.J.Fernandes., A. Sobiesiak., A. Pollard., opposit round jets issuing
into a small aspect ratio channel cross flow," Experimental Thermal and
Fluid Science. Vol.13, pp.374-394, 1996.
[15] M. S. Perchanok, D. M. Bruce, I. S. Gartshore, "Velocity measurements
in an isothermal scale model of a hog fuel boiler furnace," J, Pulp Paper
Sci. vol.15, pp.212-219, 1989.
[16] K. S. Chen, J,Y. Hwang, "Experimental study on the mixing of one and
Dual-Line heated jets with a cold crossflow in a confined channel,"
AIAA J, vol.29, pp.353-360, 1991.
[17] Kazuyoshi Nakabe, Elzbieta Fornalik, Jens F. Eschenbacher et al.,
"Ineractions of longitudinal vortices generated by twin inclined jets and
enhancement of impingement heat transfer," International Journal of
heat and fluid flow,vol.22, pp.287-292, 2001.
[18] EH. Mathews, "Numerical solutions of fluid problems related to
buildings, structures and the environment," Building and Environment,
24 (1):1. 1989.
[19] BE. Launder, DB. Spalding, "The numerical computation of turbulent
flows," Computer Methods in Applied Mechanics and Engineering,
vol.3, pp.269-89, 1974.
[20] S. Murakami, "Prediction, analysis and design for indoor climate in
large enclosures," Roomvent -92. In: Proceedings of third international
conference. DANVAK, 1992.
[21] Q. Chen, Z. Jiang, "Significant questions in predicting room air motion,"
ASHRAE Transactions, vol.98(1), pp.929-38, 1992.
[22] PG. Schild, PO. Tjelflaat, D. Aiulfi, "Guidelines for CFD modeling of
atria," ASHRAE Transaction, vol.101(2), pp.1311-29, 1995.
[23] B.Kader, Temperature and concentration profiles in fully turbulent
boundary layers," Int. J.Heat Mass Transfer vol.24, pp.1541-1544, 1993.
[24] M. Wolfstein, "The Velocity and Temperature Distribution of One-
Dimensional Flow with Turbulence Augmentation and Pressure
Gradient," Int. J. Heat Mass Transfer, vol.12, pp.301-318, 1969.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:60445", author = "T. Chammem and H. Mhiri and O. Vauquelin", title = "Dominant Flow Features of Two Inclined Impinging Jets Confined in Large Enclosure", abstract = "The present study was provided to examine the
vortical structures generated by two inclined impinging jets with
experimental and numerical investigations. The jets are issuing with a
pitch angle α=40° into a confined quiescent fluid. The experimental
investigation on flow patterns was visualized by using olive particles
injected into the jets illuminated by Nd:Yag laser light to reveal the
finer details of the confined jets interaction. It was observed that two
counter-rotating vortex pairs (CVPs) were generated in the near
region. A numerical investigation was also performed. First, the
numerical results were validates against the experimental results and
then the numerical model was used to study the effect of section ratio
on the evolution of the CVPs. Our results show promising agreement
with experimental data, and indicate that our model has the potential
to produce useful and accurate data regarding the evolution of CVPs.", keywords = "Inclined impinging jets, counter-rotating vortex pair,
CFD, experimental investigation, section ratio.", volume = "7", number = "4", pages = "627-9", }
