Experimental Investigation of Flow Structure over an Elliptic Cylinder Located Between Two Parallel Plates by Using PIV Technique
Yazarlar (4)
Prof. Dr. Hüseyin Turan ARAT İskenderun Teknik Üniversitesi, Türkiye
Prof. Dr. Cuma Karakuş İskenderun Teknik Üniversitesi, Türkiye
Prof. Dr. Ali Koç İskenderun Teknik Üniversitesi, Türkiye
Ertuğrul Baltacıoğlu
İskenderun Teknik Üniversitesi, Türkiye
İskenderun Teknik Üniversitesi, Türkiye
| Bildiri Türü | Tebliğ/Bildiri | Bildiri Dili | İngilizce |
| Bildiri Alt Türü | Tam Metin Olarak Yayınlanan Tebliğ (Uluslararası Kongre/Sempozyum) | ||
| Bildiri Niteliği | Alanında Hakemli Uluslararası Kongre/Sempozyum | ||
| Kongre Adı | 6th International Ege Energy Symposium Exhibition | ||
| Kongre Tarihi | 28-06-2012 / 30-06-2012 | ||
| Basıldığı Ülke | Basıldığı Şehir | ||
| UAK Araştırma Alanları |
Enerji
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| Özet |
| Applications of certain heat exchangers and two parallel plates containing an 1 elliptic cylinder, resembled with each other respectively. Flow characteristics in front and behind of 2 elliptic cylinders located two parallel plane plates are investigated experimentally using the Particle 3 Image Velocimetry (PIV). In the experiments Reynolds numbers, which calculated with depends on 4 the elliptic cylinder diameter, varying between 1500≤ Red≥ 10000 and the aspect ratio (AR) of 5 elliptic cylinders are changing between 1 and 2.33. Elliptic cylinders which have these AR’s are 6 influenced the character of flow structure with Reynolds numbers variations. The obtained results 7 are presented with the two-dimensional flow velocity vector maps< V>, patterns of streamlines< Ψ> 8 and vorticity contour lines< ω>. Instantaneous and time-averaging of PIV data’s, reveal valuable 9 information about the behavior of the horseshoe vortex system. In front of the elliptic cylinder, 10 different stagnation points occur, indicating the development of horseshoe vortices. These vortices 11 occasionally roll up to combine a single primary vortex. In behind of elliptic cylinders, there is a 12 different flow structure about vortices formations. An increasing Reynolds number and AR value, 13 horseshoe vortices, decrease its dimensions and increase its intensity. Increasing these values, it is 14 suggested that, tended to change values effects heat transfer performance. As a result; this study 15 contains, how the flow structure changes with usage of elliptic cylinder rather than circular cylinder, 16 were investigated in detail. 17 |
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