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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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Numerical Analysis of The Effects of Propeller High Thrust Distribution on Propulsion System Performance Sandjaja, Irfan Eko; Ariana, I Made; Erwandi, Erwandi; Indiaryanto, Mahendra; Muryadin, Muryadin; Adietya, Berlian Arswendo
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 3 (2023): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i3.54715

Abstract

High ship propulsion performance is the main goal of designers, propeller is one component of the propulsion system that also affects the performance of the propulsion. In propeller planning, it is necessary to pay attention to the efficiency of the propeller, in addition to reducing ship operating costs and reducing CO2 gas emissions which is one of the requirements for ships built above 2013, the rules have been made into the Energy Efficiency Design Index (EEDI) standard. At this time the propeller that is widely used is the B Series propeller including the propeller design used on mini LNG ships, namely the B6.40 propeller, the B Series propeller has a pitch character from the Wageningen Propeller Series study. Innovations are made to get better propeller efficiency by varying the pitch distribution. The B6.40 propeller of the standard constant pitch type was modified to B6.40 variable pitch (high thrust). Propellers with high thrust have better efficiency especially for non-fast boats. This study was conducted to obtain the best propeller efficiency of a constant pitch propeller and three high thrust propeller units using Numeca's Computational Fluid Dynamics (CFD) numerical self-propulsion test. For validation of the simulation program by comparing the results of the open water test B6.40 Wageningen while resistance validation by comparing the ship resistance model test. The results of the self-propulsion test using Disc Actuator show that the propulsion coefficient (PC) of Modified-2 and Modified-3 high thrust propellers is better when compared to constant pitch. The magnitude of the increase in PC value reaches ± 4% higher than the constant pitch type on the Modified-3 propeller.
Optimization Design and Hydrodinamic Test on Propeller Mini Submarine Asrowibowo, Nurwidhi; Indiaryanto, Mahendra; , Rina
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 27 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v27i1.425

Abstract

The defense equipment technology development which is in this case is the submarine research became an important subject and need to be further researched. One part of it is, designing driving components (propeller) of a mini-submarine with a high level of efficiency. Test models of mini-submarines of 22 m was used as a basis for developing propeller through scale models with the scale factor of 1:7. Expected propeller design optimization is capable of producing high effisensi currently working on the operational speed propeller. This research method is based on the results of the propeller design optimization, numerical simulations using Computer Fluid Dynamic (CFD ) and hydrodynamic test. The results of this study shows that the method applied here could provide a solution in the choice of an efficient propeller designs for mini-submarines 22 m.
Effect of Pitch Distribution on The Propeller Efficiency and Cavitation of Offshore Patrol Vessels 98 Meter Risnawan, Novan; Setyanto, Taufiq Arif; Gani, Erzi Agson; Indiaryanto, Mahendra; Adietya, Berlian Arswendo
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 22, No 2 (2025): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v22i2.68808

Abstract

This paper discusses the effect of pitch distribution on the propeller of a high-speed vessel (Offshore Patrol Vessel) on propeller efficiency and cavitation on the propeller blade surface. A propeller model design with five blades featuring symmetric blade contours and ogival-shaped foil, tested through open water tests in a towing tank, is used as the research object. Three variations of pitch distribution based on PropCAD recommendations: original pitch, 80% hub pitch distribution, and high-thrust pitch distribution, are used as parameters to calculate propeller efficiency using Computational Fluid Dynamics (CFD). The cavitation phenomena occurring on the propeller blades under each pitch distribution condition are analysed using the Burrill method (Burrill Diagram). Based on CFD analysis, it was found that the propeller with the highest propeller efficiency, η, is obtained from the high-thrust pitch distribution (0.6072), compared to the original pitch distribution (0.5902) and the 80% hub pitch distribution (0.5651). Cavitation occurs in all three pitch variations because the thrust loading coefficient values (τc) for the original pitch distribution (0.1286), 80% hub pitch distribution (0.1183), and high-thrust pitch distribution (0.1293) are higher than the cavitation threshold from the Burrill diagram (τ'c = 0.0783).
DIMENSIONAL ANALYSIS AND EXPERIMENTAL DESIGN FOR PREDICTING THE CALCULATION OF THE VALUE OF THE TORQUE COEFFICIENT ON PROPELLER B-SERIES, CASE STUDY OF B3-50 AND B5-80 Adietya, Berlian Arswendo; Indiaryanto, Mahendra; S, Sutiyo; Kusuma, Cahya
Journal of Marine-Earth Science and Technology Vol. 3 No. 3 (2022): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v3i3.581

Abstract

Experimental design is a fairly old method of statistically analyzing an experimental prediction. This is used to replace a fairly old system as well, namely in the form of a trial and error method. Because with this method the response results approach from a study can be predicted statistically. In this study, we will calculate some torque values of a propeller on a displacement ship type. Where the ship's operational displacement ship runs on a Froude number below 0.25, for that the Wageningen B-series propeller type is very suitable for this ship. Furthermore, dimensional analysis is carried out with variables that affect propeller performance and uses multivariate combination calculations. The results of the study show the regression equation between the KQ values of the B-series propeller data and the regression formula with the equation Y = 0.9916x + 0.000835 with the value of R2 being 0.9931. so we try to apply an experimental design method to be validated with the polynomial results of the B-series propeller on blades 3 to 6, so that the statistical method of this experimental design is up-to-date in propulsion design calculations.
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