STUDI KARAKTERISTIK HIDRODINAMIKA TEROWONGAN AIR DENGAN PENDEKATAN EKSPERIMEN SEKALA MODEL

AZRIAL ARYO PUTRA, . (2025) STUDI KARAKTERISTIK HIDRODINAMIKA TEROWONGAN AIR DENGAN PENDEKATAN EKSPERIMEN SEKALA MODEL. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Seiring perkembangan zaman, kebutuhan akan kendaraan yang cepat serta bangunan tinggi dan besar semakin meningkat, untuk mendukung perancangan struktur dan desain aerodinamika tersebut, diperlukan uji aliran fluida guna mengetahui karakteristik laju aliran, distribusi tekanan, dan gaya hambat (drag) yang terjadi. Pengujian aliran fluida umumnya dilakukan melalui terowongan angin, terowongan air, atau simulasi komputasi fluida (CFD). Dalam penelitian ini, digunakan terowongan air karena kemampuannya mempermudah visualisasi aliran dan pengaturan kecepatan fluida. Tujuan dari penelitian ini adalah menghitung kecepatan aliran, nilai Reynolds number, dan jenis aliran (laminer atau turbulen) dari tiga variasi diameter outlet: 1 cm, 1,5 cm, dan 5 cm. Pengukuran dilakukan menggunakan metode debit aliran, motion tracker, dan simulasi. Hasil pengujian menunjukkan bahwa pada outlet 1 cm, kecepatan rata-rata sebesar 3,8 mm/s (debit), 3,36 mm/s (motion tracker), dan 3,4 mm/s (simulasi), dengan nilai Reynolds number berkisar antara 694,18 hingga 806,27 (laminer). Pada outlet 1,5 cm diperoleh kecepatan 16 mm/s (debit), 14,5 mm/s (motion tracker), dan 14,5 mm/s (simulasi), dengan Reynolds number antara 3090,7 hingga 3493,84 (turbulen). Sedangkan pada outlet 5 cm, kecepatan tercatat 67 mm/s (debit), 64,56 mm/s (motion tracker), dan 64 mm/s (simulasi), dengan Reynolds number 14378,49 hingga 14512,87 (turbulen). Kata Kunci: laminer dan turbulen, Motion tracker, Reynold number, Terowongan air, Visualisasi fluida. ***** As time progresses, the demand for high-speed vehicles as well as tall and large buildings continues to increase. To support the design of such structures and aerodynamic performance, fluid flow testing is essential to determine flow characteristics, pressure distribution, and drag forces. Fluid flow testing is generally conducted through wind tunnels, water tunnels, or computational fluid dynamics (CFD) simulations. In this study, a water tunnel is utilized due to its ability to simplify flow visualization and allow easier control of fluid velocity. The objective of this research is to calculate the flow velocity, Reynolds number, and flow type (laminar or turbulent) based on three variations of outlet diameter: 1 cm, 1.5 cm, and 5 cm. Measurements were performed using flow rate calculations, motion tracking, and simulations. The test results show that at the 1 cm outlet, the average velocity was 3.8 mm/s (flow rate), 3.36 mm/s (motion tracker), and 3.4 mm/s (simulation), with Reynolds numbers ranging from 694.18 to 806.27 (laminar). For the 1.5 cm outlet, the velocities were 16 mm/s (flow rate), 14.5 mm/s (motion tracker), and 14.5 mm/s (simulation), with Reynolds numbers between 3090.7 and 3493.84 (turbulent). Meanwhile, at the 5 cm outlet, recorded velocities reached 67 mm/s (flow rate), 64.56 mm/s (motion tracker), and 64 mm/s (simulation), with Reynolds numbers ranging from 14378.49 to 14512.87 (turbulent).

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Darwin Rio Budi Syaka, M.T. ; 2). Nugroho Gama Yoga, S.T., M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik Teknologi dan Ilmu Terapan > Manufaktur
Divisions:	FT > S1 Teknik Mesin
Depositing User:	Azrial Aryo Putra .
Date Deposited:	14 Aug 2025 06:05
Last Modified:	14 Aug 2025 06:05
URI:	http://repository.unj.ac.id/id/eprint/60889

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