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ÇAPRAZ JETLERDEKİ GİRDAP YAPILARININ İKİNCİ DERECE TÜRBÜLANS MODELİ İLE İNCELENMESİ

THE INVESTIGATION OF VORTICES BY USING SECOND ORDER TURBULENCE CLOSURE

Journal Name:

  • Havacılık ve Uzay Teknolojileri Dergisi

Publication Year:

  • 2007

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the vortex structures seen in a jet in a crossflow phenomena which has numerous applications are obtained by using Reynolds Stress Turbulence Model. The flow is three-dimensional and fully turbulent in nature so a three-dimensional channel and a pipe are considered. The numerical results are compared with an experimental data found in open literature and it is seen that the velocity components and turbulent kinetic energy variations are in good agreement with the experimental results.
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Abstract (Original Language): 
Bu çalışmada, çok geniş uygulama alanlarına sahip bir akış türü olan çapraz jet akışlarındaki girdap yapıları Reynolds gerilme modeli ile elde edilmiştir. Akış doğası gereği üç-boyutlu ve tam türbülanslı olduğundan sonuçlar üç-boyutlu bir kanal ve boru düşünülerek sağlanmıştır. Sonuçlar gösterilmeden önce söz konusu bu sayısal çalışma literatürdeki mevcut bir çalışma ile mukayese edilmiş ve hız bileşenleri ve türbülans kinetik enerji değişimlerinin deneyle uyum içinde olduğu görülmüştür .
FULL TEXT (PDF): 
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  • Turkish

REFERENCES

References: 

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[2] Fric, T.F., Roshko, A., “Vertical Structures in the Wake of a Transverse Jet”, J. Fluid Mechanics, Vol. 279, pp.1–47, 1994.
[3] Kelso, R. M., Lim, T.T., Perry, A.E., “An Experimental Study of Round Jets in Crossflow”, J. Fluid Mechanics, Vol. 306, pp.111–144, 1996.
[4] Andreopoulos, J., Rodi, W., “Experimental Investigation of Jets in a Crossflow”, J. Fluid Mechanics, Vol. 138, pp.93-127, 1984.
[5] Rudman, M., “Simulation of the Near Field of a Jet in a Crossflow”, Exp. Thermal and Fluid Flow, 12, 134-141, 1996.
[6] Peterson, S.D., Plesniak, M.W., “Short-Hole Jet-in Crossflow Velocity Field and Its Relationship to Film Cooling Performance”, Experiments in Fluids 33, 889-898, 2002.
[7] Ni, W., “Numerical Prediction of the Statistical Properties of Heated Turbulent Air Jets in a Crossflow”, PhD Thesis, University of Toronto, 1994.
[8] Camussi, R., Guj, G., Stella, A., “Experimental Study of a Jet in a Crossflow at a Very Low Reynolds Number”, J. Fluid Mechanics, Vol. 454, pp.113-144, 2002.
[9] Gibson, M.M., Launder, B.E., “Ground Effects on Pressure Fluctuations in the Atmospheric Boundary Layer”, J. Fluid Mechanics, Vol.86, pp.491-511, 1978.
[10] Launder,B.E., “Second-Moment Closure:Present and Future?”, Int. J. Heat and Fluid Flow, 10(4):282-300, 1989.
[11] T.F. Fric, “Structure Near Field of the Transverse Jet”, PhD Thesis, California Institute of Technology, 1990.
[12] Hale, C. A., Plesniak, M. W., Ramadhyani, S. “Structural Features and Surfade Heat Transfer Associated with a Row of Shot-Hole Jets in Crossflow”, International Journal of Heat and Fluid Flow 21, 542-553, 2000.
[13] Kelso, R.M., T. T. Lim., A.E. Perry, “An Experimental Study of a Round Jet in a Cross-Flow”, J. Fuid Mechanics, Vol. 306, 1996.

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