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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Journal of Marine-Earth Science and Technology Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) International Journal of Marine Engineering and Applications
Indiaryanto, Mahendra
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Aerospace Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Journal : International Journal of Marine Engineering and Applications

 1 
NUMERICAL SIMULATIONS OF TURBULENT GAS-SOLID FLOW IN A GRADUAL EXPANSION Indiaryanto, Mahendra; Kusuma, Cahya; Arsad, Roy Mansyah
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.365

Abstract

The dwindling availability of petroleum fuels encourages the use of fuel from renewable and environmentally friendly natural resources. This study focused on the iodine value in used biodiesel methyl ester and its effect on the performance of the main components of a diesel motor such as power, torque, brake mean effective pressure (BMEP), and specific fuel oil consumption (SFOC). Numerical research was carried out on the YANMAR TF85-MH engine model using computational fluid dynamics (CFD). The variations used are biodiesel B20, 20A, and 20B at three different engine rotation speeds, 1900 RPM, 2000 RPM, and 2100 RPM. The results show that the performance of biodiesel B20 is better compared to others. It produces 4.01 kW of power, 19.79 N.m of torque, 82065.12 Pa of BMEP, and 270.43 gr/Kwh of SFOC. While the B20A produces 4.61 kW of power, 20.44 N.m of torque, 84067.31 Pa of BMEP, and 288.76 gr/Kwh of SFOC. Then, the B20B produces 4.12 kW of power, 20.57 N.m of torque, 83244 Pa of BMEP, and 316.57 gr/Kwh of SFOC. So, it can be seen that the mixture of biodiesel fuel with iodine slightly affects the increase in diesel motor performance. In addition, the use of renewable energy fuels must be encouraged because their availability is maintained.
EFFECT OF PROPELLER DESIGN ON PROPELLER EFFICIENCY ON CARGO SHIPS Kusuma, Cahya; Indiaryanto, Mahendra
IJMEA Journal Kedokteran Gigi Vol 2 No 1 (2025): March 2025
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v2i1.378

Abstract

This research examines the effect of the use of propellers on propeller performance on cargo ships. Using computational fluid analysis (CFD), the study evaluated the fluid flow around the propeller under two conditions: with and without a propeller. Shows an increase in propeller efficiency of up to 15% at cruising speed with the use of propellers. The implication of these results is the potential application of propeller technology to improve the overall efficiency and performance of cargo ships. Through a combined approach of numerical simulation and experimental testing, we conducted an in-depth analysis of various propeller designs. With factors such as shape, size, angle of attack, and propeller profile in evaluating propeller performance. Empirical data were obtained through trials at a model ship test facility and compared with computer simulation results. The results of this study provide valuable insights for the shipping industry in improving the operational efficiency of cargo ships. These findings can be used by shipping companies and shipbuilders to optimize propeller designs and improve their operational efficiency.
Co-Authors , Rina Arsad, Roy Mansyah Asrowibowo, Nurwidhi Berlian Arswendo Adietya Erwandi Erwandi Gani, Erzi Agson I Made Ariana Kusuma, Cahya Muryadin, Muryadin Risnawan, Novan S, Sutiyo Sandjaja, Irfan Eko Setyanto, Taufiq Arif