Analisis Numerik Pengaruh Penempatan Vortex Generator terhadap Karakteristik Coefficient of Drag pada Sapuangin XI EVO 3

Jundi, Ahmad Fakhrizan (2022) Analisis Numerik Pengaruh Penempatan Vortex Generator terhadap Karakteristik Coefficient of Drag pada Sapuangin XI EVO 3. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

Text 02111740000176-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2024. Download (9MB) | Request a copy

Abstract

Selama 10 tahun, ITS Team Sapuangin mewakili Insititut Teknologi Sepuluh mengikuti ajang Shell Eco-Marathon di kategori ICE (Internal Combustion Engine). Kompetisi ini diadakan oleh Shell untuk menunjang risetnya dalam pembuatan kendaraan otomotif dengan efisiensi konsumsi energi tertinggi. ITS Team Sapuangin telah mengikuti kompetisi Shell Eco Marthon Asia sejak tahun 2011. Sejak tahun 2017, ITS Team Sapuangin berkompetisi pada kelas Urban Concept kategori Internal Combustion Engine Gasoline. Pada Shell Eco Marathon Asia 2019 yang diadakan di Sirkuit Sepang Malaysia, ITS Team Sapuangin berhasil mendapatkan juara 1 pada kelas dan kategori tersebut dengan capaian 415 km/liter.
Untuk meningkatkan efisiensi konsumsi energi pada kendaraan dilakukan pengurangan hambatan-hambatan pada kendaraan tersebut salah satunya adalah hambatan aerodinamika (Aerodynamic Resistance). Hambatan Aerodinamika besarnya dipengaruhi dari coefficient of drag. Vortex generator (VG) merupakan salah satu aerodynamic device yang dipilih pada penelitian ini untuk mengurangi aerodynamic resistance dikarenakan fungsinya yang menghasilkan streamwise vortices yang dapat meningkatkan momentum aliran pada dekat permukaan body. Momentum aliran yang lebih tinggi dapat menunda separasi sehingga drag yang dihasilkan semakin kecil. Penelitian ini mempelajari bagaimana pengaruh peletakkan vortex generator sepanjang bidang streamwise terhadap Coefficient of Drag mobil Sapuangin XI EVO 3. Variasi peletakkan yang digunakan adalah x/c = 0.80, 0.85, dan 0.90. Sedangkan variasi kecepatan yang digunakan adalah 10, 25, dan 40 km/h sesuai dengan kecepatan tempuh dari mobil Sapuangin XI EVO 3. Pendekatan numerik ini dilakukan dengan menggunakan software ANSYS Fluent 2019 R3.
Hasil menunjukkan nilai cd setelah penggunaan vortex generator mengalami kenaikkan pada variasi peletakkan x/c = 0.80 dan 0.85, namun terdapat penurunan pada variasi peletakkan x/c = 0.90 di beberapa kecepatan. Pada kecepatan 10 km/jam, nilai cd vortex generator x/c = 0.80 mengalami kenaikan 7,049%, x/c = 0.85 mengalami kenaikan 4.990%, dan x/c = 0.90 mengalami kenaikan 0.496%. Pada kecepatan 25 km/jam, nilai cd vortex generator x/c = 0.80 mengalami kenaikan 9.687%, x/c = 0.85 mengalami kenaikan 5.824%, dan x/c = 0.90 mengalami penurunan 0.651%. Pada kecepatan 40 km/jam, nilai cd vortex generator x/c = 0.80 mengalami kenaikan 10.709%, x/c = 0.85 mengalami kenaikan 2.446%, dan x/c = 0.90 mengalami penurunan 0.508%.
======================================================================================================
For ten years, ITS Team Sapuangin has competed in the Shell Eco-Marathon in the ICE (Internal Combustion Engine) category, representing Institut Teknologi Sepuluh Nopember. This competition is held by Shell to support its research of the most energy-efficient automobiles. Since 2011, ITS Team Sapuangin has competed in the Shell Eco Marthon Asia event. Since 2017, ITS Team Sapuangin has competed in the Internal Combustion Engine Gasoline category, Urban Concept class. ITS Team Sapuangin won first position in the class and category in the Shell Eco Marathon Asia 2019 held at the Sepang Circuit in Malaysia, with a mileage of 415 km/liter.
It is necessary to reduce vehicle drags, one of which is aerodynamic resistance, in order to maximize the efficiency of energy consumption in vehicles. The Coefficient of Drag has an impact on aerodynamic drag. Because its function is to produce streamwise vortices, which can increase the momentum of the flow near the body surface, the vortex generator (VG) is one of the aerodynamic devices considered in this study to minimize aerodynamic resistance. Higher flow momentum might cause separation to take longer, resulting in less drag. The effect of positioning the vortex generator along the streamwise plane on the Sapuangin XI EVO 3's Coefficient of Drag is investigated in this study. x/c = 0.80, 0.85, and 0.90 were employed as placement modifications. According to the Sapuangin XI EVO 3's travel speed, the speed variants employed are 10, 25, and 40 km/h. The ANSYS Fluent 2019 R3 software is used to conduct out this numerical technique.
The result showed that the value of cd has grown in the variation of lying x/c = 0.80 and 0.85 after employing the vortex generator, but has decreased in the variation of laying x/c = 0.90 at several speeds. The value of cd vortex generator x/c = 0.80 increased by 7.049 % at a speed of 10 km/h, x/c = 0.85 increased by 4.990 %, and x/c = 0.90 increased by 0.496 %. The value of cd vortex generator x/c = 0.80 increased by 9.687 % at a speed of 25 km/h, x/c = 0.85 increased by 5.824 %, and x/c = 0.90 decreased by 0.651 %. The value of cd vortex generator x/c = 0.80 increased by 10.709% at a speed of 40 km/h, x/c = 0.85 increased by 2.446 %, and x/c = 0.90 decreased by 0.508 %.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Vortex generator, Momentum Fluida, Coefficient of drag, Drag Force, Boundary layer, Fluid Momentum
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL152.5 Motor vehicles Driving T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL507.G77 Vortex generators. T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521 Aerodynamics, Hypersonic.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Ahmad Fakhrizan Jundi
Date Deposited:	11 Feb 2022 00:57
Last Modified:	11 Feb 2022 00:57
URI:	http://repository.its.ac.id/id/eprint/93563

Actions (login required)

View Item