Cihan BAYINDIRLI, Musa Özel, Emre AYGÜN, Yahya Erkan AKANSU, Mehmet SEYHAN

The passive flow control around a truck-trailer model / Bir kamyon römork modeli etrafındaki pasif akış kontrolü

In this study the aerodynamic characteristics of 1/32 scale truck and trailer model were examined in a wind tunnel. The acting drag force to model truck and trailer combination is calculated and aerodynamic drag coefficient is determined. The wind tunnel tests were carried out in the range of 160 000 - 449 000 Reynolds numbers. In order to improve the aerodynamics structure of truck- trailer, one spoiler, one passive air channel and three different redirector is produced in three dimensional printer. These aerodynamic parts respectively added to base truck-trailer model and obtaining aerodynamic improvement rates compared. According to wind tunnel test results, the aerodynamic improvement rates are respectively 15,62 %, 18,80 %, 23,58 % and 21,54 %. The lowest drag coefficient was determined as 0,588 on model-3 of truck-trailer model. Özet: Bu çalışmada, 1/32 ölçekli kamyon ve treyler modeli aerodinamik özellikleri bir rüzgar tünelinde incelenmiştir. Model kamyon ve treyler kombinasyonu hareket sürtünme kuvveti hesaplanır ve aerodinamik sürtünme katsayısı belirlenir. 449 000 Reynolds sayıları - rüzgar tüneli testleri 160 000 aralığında gerçekleştirilmiştir. KAMYON römork, tek spoiler, tek pasif hava kanalı ve üç farklı yönlendiricisi aerodinamik yapısını iyileştirmek amacıyla üç boyutlu yazıcıdan üretilmektedir. Bu aerodinamik parçalar sırasıyla taban kamyon römork modeline eklenmiş ve elde aerodinamik iyileştirme oranları karşılaştırıldı. Rüzgar tüneli testi sonuçlarına göre, aerodinamik iyileştirme oranları sırasıyla 15,62,% 18,80,% 23,58 ve% 21,54% bulunmaktadır. Düşük sürtünme katsayısı modeli-3 kamyon römork model üzerinde 0,588 olarak belirlendi.

Keywords:

The aerodynamic drag coefficient, passive air channel passive flow control, wind tunnel / Aerodinamik sürtünme katsayısı, pasif hava kanalı, pasif akış kontrolü, rüzgar tüneli,

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