On the Aerodynamics of Rear of Vehicle Model with Active Control by Blowing: Computational and Experimental Analysis

Tarakka, Rustan; Salam, Nasaruddin; Mochtar, Andi Amijoyo; Rauf, Wawan; Ihsan, Muhammad

doi:10.18178/ijmerr.12.2.84-90

Cited by 3 publications

(2 citation statements)

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“…Oleh karena itu, pemerintah mengeluarkan Instruksi Presiden nomor 13 tahun 2011 untuk mengurangi penggunaan energi yang berasal dari bahan bakar fosil. Penghematan konsumsi bahan bakar dapat diperoleh selain melalui kajian aerodinamika seperti yang telah diteliti oleh (Rauf et al, n.d.) (Rauf et al, 2023) (Tarakka et al, 2022) (Tarakka et al, 2023), juga dapat ditempuh dengan menghadirkan bahan bakar alternatif.…”

Section: Pendahuluanunclassified

Kajian Eksperimental Pengaruh Campuran Etanol Dan Pertamax Terhadap Konsumsi Bahan Bakar Motor Injeksi 125cc

Rauf

2023

RADIAL

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Experimental Study of the Effect of a Mixture of Ethanol and Pertamax on Fuel Consumption of a 125cc Injection Motorcycle. Currently the need for petroleum is quite high. This is because transportation and industry still rely on petroleum as the main fuel. Ethanol has similar properties to Pertamax fuel which can be applied to every vehicle, especially two-wheeled vehicles. The aim of this research is to find out how the addition of ethanol to Pertamax fuel affects the amount of fuel consumed by injection motorbikes. The mixture percentages that will be tested are E10+P90, E20+P80, and E30+P70 respectively, and then the consumption results are compared with tests using pure Pertamax (E0+P100). The test results show that the use of Ethanol-Pertamax mixed fuel can be reduced when the percentage of the ethanol mixture is below 50%. Where the lowest fuel consumption is the E30+P70 mixture at 16.4% compared to pure Pertamax consumption.

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Section: Pendahuluanunclassified

Kajian Eksperimental Pengaruh Campuran Etanol Dan Pertamax Terhadap Konsumsi Bahan Bakar Motor Injeksi 125cc

Rauf

2023

RADIAL

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“…The active flow control by the Coanda effect suppresses the recirculating region and reduces the drag by 10% (Geropp and Odenthal, 2000). The steady blowing jets at the rear window roof reduces the lift by 7% and drag by 12% (Heinemann et al , 2014; Cerutti et al , 2020; Mestiri et al , 2014; Tarakka et al , 2019; Tarakka et al , 2023). The pulsed microjets on the car’s rear side show a negligible effect on drag and 9% reduction in lift (Aider et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Flow control of a vehicle using reverse flow fan

Raj Mohamed,

2023

AEAT

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Purpose This study aims to achieve optimum flow separation control for a road vehicle using a reverse flow fan on rear side. Design/methodology/approach A full-length reverse flow fan array (fan’s air speed is 50% of the car’s speed) is attached throughout the width of the vehicle at rear edge corner. Findings The reverse flow fan array positioned at rear edge of car pushes the airflow against the car’s rear window. It creates the recirculation region and alters the pressure distribution. This reduces the lift coefficient by 150%, which becomes the downforce and reduces the drag coefficient by 22%. As the car speed increases, fan speed should also be increased for effective flow control. Research limitations/implications This active flow control method for 3D Ahmed car body has been studied computationally at low speed (40 m/s). Practical implications This design increases the downforce, thus gives better cornering speed and stability, and decreases the drag which improves fuel efficiency. It can be used for effective flow control of cars (hatchback/sedan). The findings can be applied to the bluff bodies, road vehicles, UAV and helicopter fuselage for flow separation control. Originality/value The fan array is attached on car’s rear side, which blows air against the car’s rear window. It alters the pressure distribution and aerodynamics forces favorably. But the existing high-speed fan used in a sports cars sucks the air from bottom and pushes it rearward, which increases both the traction force and drag.

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