Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Jurnal Teknologi dan Riset Terapan (JATRA)
Jangka Rulianto
Unknown Affiliation
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
ANALISA MOMEN PUNTIR POROS IMPELLER PADA SISTEM PROPULSI WATERJET KAPAL 6 METER DENGAN VARIASI BLADE IMPELLER MENGGUNAKAN METODE CFD Bagas Dwi Kurniawan; Jangka Rulianto; Achdri Fauzi Nugraha Oloan; I Gusti Ngurah Bagus Catrawedarma; Chairul Anam
Jurnal Teknologi Dan Riset Terapan (JATRA) Vol. 7 No. 2 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i2.9968

Abstract

Analysis of the impeller shaft torsion moment in the waterjet system with impeller blade variations aims to analyze the strength of the impeller shaft caused by the specified engine power. The engine used has a power of 6.5 hp and has an output power of 2000 Rpm. This study aims to determine the impeller shaft torsion moment with impeller blade variations using the Computational Fluid Dynamic (CFD) method. Using Aloy steel 4340 material which has a shaft diameter of 23 mm and a length of 700 mm. The torque value that appears in variation 1 with 3 impeller blades is 30.65 Nm, variation 2 with 4 impeller blades is 87.61 Nm and for variation 3 with 5 impeller blades is 33.07 Nm. In accordance with the results of the calculation of the torsion moment of 30.85 Nm, it is known that variation 1 with 3 impeller blades is said to meet the specified criteria to be applied to the waterjet system. Based on the results of the specified allowable stress of 60.89 Nm, it was found that for variations 1 and 3 with the number of impeller blades of 3 and 5 respectively, they have met the safe conditions for the impeller shaft torsion moment, by considering that variation 3 is adjusted to the results of the impeller shaft torsion moment calculation to determine the effectiveness for the specified waterjet system.
TECHNICAL ANALYSIS OF ADDING HOLES TO THE SKEG OF A TUGBOAT AND ITS EFFECTS ON FLOW AND RESISTANCE USING THE COMPUTATIONAL FLUID DYNAMICS METHOD David Prayogo; Abdul Rohman; Jangka Rulianto; Khairul Muzaka; I Gusti Ngurah Bagus Catrawedarma
Jurnal Teknologi Dan Riset Terapan (JATRA) Vol. 7 No. 2 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i2.10163

Abstract

Tugboats play a crucial role in supporting the safety and operational efficiency of ports and offshore activities. One of the key components in tugboat design is the skeg, which serves to enhance directional stability and reduce yawing effects. This study aims to analyze the influence of the number of holes in the skeg on the flow characteristics and resistance of a tugboat. Three skeg variations were tested: a skeg without holes, a skeg with two holes, and a skeg with four holes, under two speed conditions, namely 10 knots and 15 knots. The observed parameters include wetted surface area, drag force, and longitudinal flow velocity (velocity u). The simulation results indicate that the skeg without holes produced the lowest drag values, at 22.570 N at 10 knots and 138.430 N at 15 knots, along with a more stable and streamlined flow pattern. In contrast, adding holes to the skeg resulted in increased drag and flow disturbances in the form of vortices and fluid separation. Therefore, the skeg without holes is considered more hydro dynamically optimal for improving the operational efficiency of tugboats.  
Co-Authors ABDUL ROHMAN Achdri Fauzi Nugraha Oloan Bagas Dwi Kurniawan Chairul Anam David Prayogo IGNB. Catrawedarma Khairul Muzaka