Studi Numerik Karakteristik Aliran Melintasi Silinder Sirkular Dengan Bodi Pengganggu Airfoil Naca 0012, Naca 0018, Naca 0024 Yang Tersusun Tandem

Ilmi, Innastya Hafshah Irbatul (2023) Studi Numerik Karakteristik Aliran Melintasi Silinder Sirkular Dengan Bodi Pengganggu Airfoil Naca 0012, Naca 0018, Naca 0024 Yang Tersusun Tandem. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian mekanika fluida semakin penting seiring dengan pertumbuhan industri dan kemajuan teknologi penerbangan dan pesawat terbang. Studi tentang aliran fluida terus berkembang, termasuk aliran eksternal, turbulensi, CFD, dan fenomena lainnya. Aliran eksternal pada silinder sirkular mengalami stagnasi, boundary layer, separasi, dan wake di belakang silinder yang menyebabkan drag force. Memanipulasi medan aliran dengan metode pengendalian aliran secara pasif, seperti memanjangkan bagian downstream, memberikan kekasaran pada permukaan bluff body, atau menempatkan bodi pengganggu pada bagian upstream dari bluff body dapat mengurangi gaya hambat. Dalam penelitian ini dilakukan secara numerik dengan penambahan bodi pengganggu berupa airfoil dengan tiga macam NACA yang memiliki angle of attack 5˚ yaitu NACA 0012; NACA 0018; NACA 0024 ditempatkan di depan silinder sirkular (D = 36 mm) sisi upstream dengan variasi jarak S/D = 0,2 ; 0,6 ; 1 ; 1,4. Simulasi numerik ini menggunakan CFD solver FLUENT 2023 R1 Student Version dengan pemodelan 2D-unsteady flow dan turbulence viscous model k-ω Shear Stress Transport. Penelitian numerik ini dilakukan pada bilangan Reynolds sebesar 2,01 x 104. Hasil yang diperoleh yaitu dari penambahan bodi pengganggu airfoil NACA 0012 pada jarak S/D = 1,4 dapat mereduksi koefisien drag secara optimal sebesar 28,4%. Sedangkan reduksi koefisien drag terendah terjadi pada NACA 0018 dengan jarak S/D = 1 yaitu sebesar 11%.
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Fluid mechanics research is gaining importance as the industry grows and aviation and aircraft technology advances. The study of fluid flow continues to grow, including external flow, turbulence, CFD and other phenomena. The external flow in a circular cylinder experiences stagnation, boundary layer, separation, and wake behind the cylinder, which causes drag force. Manipulating the flow field with passive flow control methods, such as lengthening the downstream section, providing roughness on the bluff body surface, or placing a disturbing body on the upstream section of the bluff body can reduce drag. In this study, a numerical simulation was conducted with the addition of a disturbing body in the form of an airfoil with three kinds of NACA having an angle of attack of 5˚, namely NACA 0012; NACA 0018; NACA 0024 placed in front of a circular cylinder (D = 36 mm) on the upstream side with a distance variation of S/D = 0.2; 0.6; 1; 1.4. This numerical simulation uses CFD solver FLUENT 2023 R1 Student Version with 2D-unsteady flow modeling and turbulence viscous model k-ω Shear Stress Transport. This numerical study was conducted at a Reynolds number of 2.01 x 104. The results obtained are from the addition of NACA 0012 airfoil intrusive body at a distance of S/D = 1.4 can reduce the drag coefficient optimally by 28.4%. While the lowest drag coefficient reduction occurs in NACA 0018 with a distance of S/D = 1, which is 11%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Airfoil, Bodi Pengganggu, Bluff Body, Drag, Lift
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Innastya Hafshah Irbatul Ilmi
Date Deposited:	09 Oct 2023 02:31
Last Modified:	09 Oct 2023 02:31
URI:	http://repository.its.ac.id/id/eprint/101977

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