Abstract
In this study; two
dimensional, viscous, incompressible, fully developed and turbulent flows on
the surface of the cylinder placed in a
channel were analyzed using numerical
methods. Momentum and continuity equations were solved numerically
by ANSYS FLUENT program using finite volume method. The effect
of the half cylinder (d = 4.4 mm) placed on the cylinder diameter (D) 44 mm in
different positions (0°, 45°, 90°, 135° and 180°) on the flow structure was
examined. Streamlines and the turbulence kinetic energy contours were drawn for
the Reynolds number 104 value depending on cylinder
diameter. As a result, downstream flow characteristics of cylinders having
semi-circular protrusions placed in different positions were examined and drag
force coefficients (CD) were obtained. It was concluded that the
protrusion on the cylinder placed at different angles changed the flow
structure and controlled the separation.
Supporting Institution
Sivas Cumhuriyet University (BAP)
Project Number
M-728
Thanks
Acknowledgments This work is supported by the Scientific Research Project Fund of Cumhuriyet University under the project number M-728.
References
- [1]- Celik S., Karakus C., Akilli H., Sahin B., Investigation of flow structure on finite-cylinder by particle imaging measurement technique (PIV), Installation Engineering, Issue 125 (2011) 33-51
- [2]- Canpolat C., Sahin B., Influence of single rectangular groove on the flow past a circular cylinder, International Journal of Heat and Fluid Flow 64 (2017) 79-88
- [3]- Gundemir O., Tastan K., Effects of longitudinal groove-roughness elements on the drag force exerted by the flow on a pipe, J. Fac. Eng. Arch. Gazi Univ. 23 (3) (2008) 637-644
- [4]- Oguz B., Akar M. A., Pınar E., Akilli H., Sahin B., Control of flow structure in the wake region of circular cylinder with meshy wire in deep water, Pamukkale University Journal of Engineering Sciences, 22 (4) (2016) 280-284
- [5]- Akar M. A., Kucuk M., Control of the unsteady flow structure behind the cylinder with passive control method, Pamukkale University Journal of Engineering Sciences 20 (4) (2014) 123-128
- [6]- Ranjith E. R., Sunil A. S., Lippin P., Analysis of flow over a circular cylinder fitted with helical strakes, Procedia Technology 24 (2016) 452-460
- [7]- Yeo D. H., Jones N. P., Computational study on aerodynamic mitigation of wind-induced, large-amplitude vibrations of stay cables with strakes, Journal of Wind Engineering and Industrial Aerodynamics 99 (2011) 389-399
- [8]- Lam K., Lin Y. F., Zou L., Liu Y., Investigation of turbulent flow past a yawed wavy cylinder, Journal of Fluids and Structures 26 (2010) 1078-1097
Abstract
Bu çalışmada, bir kanala yerleştirilen silindir
yüzeyi üzerinde iki boyutlu, viskoz, sıkıştırılamaz, gelişmiş ve türbülanslı
akış, sayısal yöntemler kullanılarak analiz edilmiştir. Momentum ve süreklilik
denklemleri ANSYS FLUENT programı ile sonlu hacimler yöntemi kullanılarak
sayısal olarak çözülmüştür. Farklı konumlarda (0°, 45°, 90°, 135° ve 180°) 44
mm çapında (D) bir silindir üzerine
yerleştirilmiş yarım silindirin (d = 4.4 mm) akış yapısına etkisi
incelenmiştir. Akım çizgileri ve türbülans kinetik enerji konturları, silindir
çapına bağlı olarak Reynolds sayısı 104 değeri için çizilmiştir. Sonuç olarak,
farklı konumlara yerleştirilmiş yarı dairesel çıkıntılara sahip olan
silindirlerin akım yönünde akış özellikleri incelenmiş, sürtünme direnç
katsayıları (CD) elde edilmiştir. Farklı
açılarda yerleştirilen silindir üzerindeki çıkıntının akış yapısını
değiştirdiği ve ayrımı kontrol ettiği sonucuna varılmıştır.
Project Number
M-728
References
- [1]- Celik S., Karakus C., Akilli H., Sahin B., Investigation of flow structure on finite-cylinder by particle imaging measurement technique (PIV), Installation Engineering, Issue 125 (2011) 33-51
- [2]- Canpolat C., Sahin B., Influence of single rectangular groove on the flow past a circular cylinder, International Journal of Heat and Fluid Flow 64 (2017) 79-88
- [3]- Gundemir O., Tastan K., Effects of longitudinal groove-roughness elements on the drag force exerted by the flow on a pipe, J. Fac. Eng. Arch. Gazi Univ. 23 (3) (2008) 637-644
- [4]- Oguz B., Akar M. A., Pınar E., Akilli H., Sahin B., Control of flow structure in the wake region of circular cylinder with meshy wire in deep water, Pamukkale University Journal of Engineering Sciences, 22 (4) (2016) 280-284
- [5]- Akar M. A., Kucuk M., Control of the unsteady flow structure behind the cylinder with passive control method, Pamukkale University Journal of Engineering Sciences 20 (4) (2014) 123-128
- [6]- Ranjith E. R., Sunil A. S., Lippin P., Analysis of flow over a circular cylinder fitted with helical strakes, Procedia Technology 24 (2016) 452-460
- [7]- Yeo D. H., Jones N. P., Computational study on aerodynamic mitigation of wind-induced, large-amplitude vibrations of stay cables with strakes, Journal of Wind Engineering and Industrial Aerodynamics 99 (2011) 389-399
- [8]- Lam K., Lin Y. F., Zou L., Liu Y., Investigation of turbulent flow past a yawed wavy cylinder, Journal of Fluids and Structures 26 (2010) 1078-1097
Details
| Primary Language | English |
|---|---|
| Journal Section | Engineering Sciences |
| Authors | |
| Project Number | M-728 |
| Publication Date | September 30, 2019 |
| Submission Date | July 3, 2019 |
| Acceptance Date | August 25, 2019 |
| Published in Issue | Year 2019 |