Control of flow around Side by Side Square Prisms Using Control Rods

Year 2020, , 543 - 550, 30.06.2020

Mehmet Seyhan , Mustafa Sarıoğlu

https://doi.org/10.35414/akufemubid.601054

Abstract

Flow characteristics around side by side square prisms with control rods are numerically investigated at different gap ratios (g*) changing between 0.5 and 6 for Re = 73. Four different flow patterns, which are single street mode, irregular street mode, regular street mode and two street mode, are identified based on the gap ratio. Maximum drag reduction (%52) is obtained at g* = 6. The mean lift coefficient has a symmetric variation between these gap ratios for the upper and lower square prisms. It can be concluded that the control rod is an effective flow control method in terms of drag reduction.

Keywords

Control rod, Square prism, Side by side, Drag coefficient

Kontrol Çubukları Kullanarak Yan Yana Kare Prizmalar Etrafındaki Akış Kontrolü

Abstract

Kontrol çubuklu yan yana kare prizmalar etrafındaki akış karakteristikleri, Re= 73 için g* = 0.5 - 6 aralığında değişen boşluk oranlarında nümerik olarak incelenmiştir. Tekli, ikili, düzensiz ve düzenli girdap caddesi olmak üzere dört farklı akış modeli boşluk oranlarına bağlı olarak tanımlanmıştır. Maksimum sürükleme azalması (%52) g* = 6’da elde edilmiştir. Ortalama kaldırma katsayısı, alt ve üst kare silindir için boşluk oranları arasında simetrik değişim göstermiştir. Kontrol çubuğunun sürükleme kuvvetini azaltması açısından etkili bir akış kontrol yöntemi olduğu sonucu çıkarılabilir.

Keywords

Kontrol çubuğu, Kare prizma, Yan yana, Sürükleme katsayısı

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