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All Journal Jurnal Rekayasa Mesin Scientific Journal of Mechanical Engineering Kinematika
Fauzun
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Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH THREE QUARTER BAFFLE TERHADAP LAJU PERPINDAHAN KALOR DAN DAYA POMPA PADA KONDENSOR VERTIKAL Yogiswara, Cahyo Wibi; Fauzun; Taufiqurrahman, Muhammad Salim
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.730

Abstract

A condenser is a heat exchanger that functions to convert vapor into liquid. One of the most commonly used of condensers is the shell and tube. This study was conducted on a laboratory-scale vertical condenser to determine the heat transfer coefficient, pressure drop, and the ratio of heat transfer rate to the required pump power. In this study, variations were made in four types of baffles and three mass flow rate ratios. The baffle types used include segmental, disc and doughnut, and three-quarter with 90° and 180° configurations. Meanwhile, the mass flow rate ratio was varied based on theoretical values, namely 90%, 100%, and 110% of the theoretical value. The condenser used is a shell and tube, where the hot fluid flows through the tube, and the cold fluid flows through the shell. Experimental results show that variations in baffle type and mass flow rate ratio significantly affect the heat transfer coefficient and the ratio of heat transfer rate to pump power. The three-quarter baffle with a 90° configuration demonstrated the best performance, with a heat transfer coefficient of 83.27 W/m²°C and a heat transfer rate-to-pump power ratio of 1.64 at a water flow rate of 2.2 GPM.
Performance Test of Airbus A380-like using GAMA Water Tunnel and Numerical Approach Syafria Wildan Hadi; Fauzun; Ata Syifa' Nugraha; Feri Hidayatulloh; Hijriawan, Miftah
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7159

Abstract

This study investigates the aerodynamic characteristics of the Airbus A380 model using a combination of water tunnel experimentation and Computational Fluid Dynamics (CFD) analysis. The research aims to analyze the relationship between the angle of attack (AOA) and the resulting lift and drag coefficients, providing insights into aerodynamic performance at low-speed flow conditions. Experiments were conducted using the GAMA Water Tunnel with a 1:416 scaled model of the A380. Lift and drag forces were measured using a load-cell sensor connected to an Arduino microcontroller, while CFD simulations were performed using Computational Fluid Dynamics (CFD) with the k–ω SST turbulence model. The simulation and experimental results were compared to validate the numerical approach. The findings show that both lift and drag coefficients increase with AOA up to a critical point, beyond which stall occurs at approximately 14°. The CFD results closely align with the experimental data, demonstrating strong agreement between the two methods. This research validates the reliability of water tunnel testing for aerodynamic studies and contributes to the development of cost-effective experimental methodologies for aircraft performance evaluation.
Co-Authors Ata Syifa' Nugraha Feri Hidayatulloh Hijriawan, Miftah Syafria Wildan Hadi Taufiqurrahman, Muhammad Salim Yogiswara, Cahyo Wibi