Investigation of Turbulent Flow Around Circular High-Rise Structure with Various Balcony Design

Öz

In this study, flow fields around circular cross-sectioned high-rise structures with and without balconies have been investigated. Three different balcony heights (h/d1=3, h/d1=3.5, h/d1=4) and three different balcony diameters (35 mm, 40 mm, 45 mm) were considered in the study, with the experiments carried out at a free stream velocity of 15 m/s. In the experimental part of the study, flow visualization around the model (h/d1=3.5) was achieved using the smoke-wire technique in the wind tunnel test section. In the numerical part, the flow patterns around the models, velocity distributions, and pressure coefficients on the balcony surfaces are calculated using the Realizable k-ε turbulence model. The pressure coefficient distributions are directly affected by the position of different balcony heights. When different balcony heights are compared, it is seen that the highest pressure coefficient values are achieved for h/d1=3, while the most critical pressure coefficient values are obtained in the case of h/d1=4.

Anahtar Kelimeler

• Balcony Height
• Computational Fluid Dynamics (CFD)
• Cylindrical Building
• Pressure Coefficient
• Wind Tunnel

Farklı Balkon Tasarımına Sahip Dairesel Kesitli Yüksek Katlı Yapı Etrafındaki Türbülanslı Akışın İncelenmesi

Öz

Bu çalışmada, balkonlu ve balkonsuz dairesel kesitli yüksek binaların etrafındaki akış alanları incelenmiştir. Çalışmada üç farklı balkon yüksekliği (h/d1=3, h/d1=3.5, h/d1=4) ve üç farklı balkon çapı (35 mm, 40 mm, 45 mm) dikkate alınmış olup, deneyler 15 m/s serbest akış hızında gerçekleştirilmiştir. Çalışmanın deneysel kısmında, rüzgar tüneli test bölgesine yerleştirilen model etrafındaki (h/d1=3.5) akış görüntülemesi duman teli tekniği kullanılarak gerçekleştirilmiştir. Sayısal kısımda ise, modeller etrafındaki akış alanları, hız dağılımları ve balkon yüzeylerindeki basınç dağılımları Realizable k-ε türbülans modeli kullanılarak hesaplanmıştır. Model yüzeylerindeki basınç katsayısı dağılımları, farklı balkon yüksekliklerinin konumundan doğrudan etkilenmektedir. Farklı balkon yükseklikleri karşılaştırıldığında, en yüksek basınç katsayısı değerlerinin h/d1=3 için elde edildiği, en kritik basınç katsayısı değerlerinin ise h/d1=4 durumunda oluştuğu görülmüştür.

Anahtar Kelimeler

• Balkon Yüksekliği
• Hesaplamalı Akışkanlar Dinamiği (CFD)
• Silindirik Bina
• Basınç Katsayısı
• Rüzgar Tüneli

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