Numerical investigation of the flow around circular cylinder with two passive controls

Hakam, Amirul; Widodo, Basuki; Yuwono, Triyogi; Imron, Chairul

doi:10.1088/1742-6596/974/1/012011

Cited by 2 publications

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References 4 publications

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“…Bentuk pasif kontrol lainnya yang diletakkan di belakang silinder yaitu bentuk elips. Pada posisi yang sama, koefisien hambat yang diterima silinder sirkular dapat berkurang hingga 31.90%[10]. Berdasarkan tiga bentuk pasif kontrol yang diletakkan di belakang silinder sirkular, pasif kontrol bentuk elips dapat menurunkan koefisien hambat secara optimal.…”

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Pengaruh Pasif Kontrol terhadap Koefisien Hambat

Imron

Widodo²,

Yuwono³

2019

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AbstrakSalah satu cara untuk mengurangi koefisien hambat adalah dengan menambahkan obyek kecil yang dinamakan pasif kontrol. Tiga pasif kontrol, terdiri satu pasif kontrol berbentuk silinder tipe-I diletakkan di depan dan dua silinder sirkular diletakkan di belakang silinder sirkular utama. Diameter silinder sirkular utama adalah D dan tiga silinder pasif kontrol berdiameter = /8. Rasio jarak antara pasif kontrol di depan dengan silinder sirkular utama adalah / = [0.6,3.0] dan dua pasif kontrol di belakang silinder sirkular yaitu / = [0.6,2.1] dan besar sudut α= 15°, 30°, 45° dan 60°. Bilangan Reynolds yang digunakan adalah Re = 1000. Konfigurasi yang tepat untuk menurunkan koefisien hambat terjadi ketika rasio jarak / = 1.8 dan / = 1.5 dengan = 30°. Koefisien hambat yang diterima silinder sirkular dapat berkurang hingga 42.98%. AbstractOne way to reduce the drag coefficient is to add a small object called passive control. Three passive controls, consisting of a type-I cylindrical are placed in front and two circular cylinders are placed behind the main circular cylinder. The diameter of the main circular cylinder is D and the diameter of the three passive controls are d = D /8. The distance ratio between the passive control in front of the main circular cylinder is S / D = [0.6,3.0] and two passive controls behind the circular cylinder, T / D = [0.6,2.1] with the angle α = 15 °, 30 °, 45 ° and 60 °. The Reynolds number used is Re = 1000. The best configuration to reduce the drag coefficient occurs when the distance ratio S / D = 1.8 and T / D = 1.5 with α = 30 °. The drag coefficient received by the circular cylinder can be reduced to 42.98%.

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Pengaruh Pasif Kontrol terhadap Koefisien Hambat

Imron

Widodo²,

Yuwono³

2019

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Reduction of Cd in circular cylinder using three passive control at Re=500

Imron

Juni

Widodo

et al. 2019

J. Phys.: Conf. Ser.

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Passive control is the addition of a small object to an object to reduce the drag force of the object. This study focuses on three passive controls. Numerically, the problem of three passive controls for drag reduction of circular cylinder is studied. In this case, three passive controls are placed in front of and in the rear of the main object. A passive control type-I is in front of circular cylinder while the others are in rear. The distance of the passive controls is varies to the circular cylinder. In this study, we want to find an effective distance of the main object to three passive controls from the shape and the angle position of the passive controls.

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Numerical investigation of the flow around circular cylinder with two passive controls

Cited by 2 publications

References 4 publications

Pengaruh Pasif Kontrol terhadap Koefisien Hambat

Pengaruh Pasif Kontrol terhadap Koefisien Hambat

Reduction of Cd in circular cylinder using three passive control at Re=500

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