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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Volume 9, Issue 1, April 2023" : 5 Documents clear
Viscous Damping Coefficient Measurement System Using Incremental Optical Encoder Sudarmaji, Arief; Putra, Arifrahman Yustika; Yudiarsah, Efta
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 9, Issue 1, April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.19525

Abstract

We built a viscous damping coefficient measurement system that applies the principles of underdamped harmonic oscillation within viscous liquid. The scientific novelty of this paper lies on the type of sensor used to capture the oscillation. An incremental optical encoder is chosen as a motion detector due to its ability to convert angular position as well as rotation direction into a pair of square wave signals. The harmonic oscillator system consists of a spring with the spring constant value of 82.8 N/m, a 1.50 kg cylindrical mass and a 95.0 g prolate ellipsoidal mass. The data acquisition system converts the encoder output pulses into counts which represent the displacements of the oscillating mass under viscous liquid. We used a Proportional Integral Derivative (PID) temperature control system to maintain the sample temperature at a constant value. Experimental data suggests that the air resistance and the total friction of the mechanical components give good contribution to the damping effect of the mass’ harmonic oscillation. The repeatability test of the viscous damping coefficient measurement resulted 1.26975744 % of relative standard deviation
The Increase Voltage Effect of The Interface Bipolar Plate to Increase H2/O2 Production Volume as alternative fuel Salamah, Khadijah Barorotus; Akbar, Abdurrahman azzam; Soegijono, Bambang; Notonegoro, Hamdan Akbar
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 9, Issue 1, April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.20478

Abstract

Renewable fuels hold the key to the increasing energy demand and environmental issues. In recent years, the installed capacity of renewable energy sources has experienced rapid growth based on limited remaining oil reserves. Applying hydrogen/oxygen as fuel in combustion engines is possible. Hydrogen (H2) which burns with Oxygen (O2) in the combustion chamber, will produce H2O compounds that are environmentally friendly. In this study, we wanted to see the effect of increasing the voltage of the interface bipolar plate to increase the H2 and O2 gas molecules volume. The experimental results show that the breaking of bonds in water compounds which utilize the interaction force between fields and charges, has been affected by an increase in voltage. The time to convert the H2O compound into H2/O2 gas molecules decreases with the increasing voltage between interfacing electrodes. The voltage increase affects the Volumetric Flow Rate (VFR) of H2 dan O2 gas molecules. This study also shows that when a voltage of 10 Volts is applied at the electrode interface, charge transport occurs optimally.
Analysis Of the Ripping Rate of Banana Fruit Coated with Biofilm Based on Polyvinyl Alcohol Chitosan Composite Amiati, Meli; Paramita, Indira; Kanani, Nufus; Wardoyo, Endarto Yudo; Kustiningsih, Indar
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 9, Issue 1, April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.20033

Abstract

The Banana (Musa spp) was a fruit whose rate of ripening increased after harvest. The respiration rate was an indicator of the fruit’s shelf life. This cause banana to have a short shelf life and become easily damaged, necessitating the technology to reduce the ripening rate of fruit, such as coating it with biofilm. This research seeks to establish the optimal ethylene concentration on the composite chitosan PVA produced by evaporation of a colloidal chitosan solution with CNC. The produced solution was then applied to the surface of the banana using the immersion method, and seven-day changes in weight loss, color change, sugar content, and ethylene gas production were detected. Post-harvest management of bananas tries to preserve the fruit’s freshness and shelf life. The research is done to improve the shelf life of bananas by composite biofilm. The data result shows that from all variants, the composite biofilm contains chitosan, PVA, 10% glycerol, Citric acid, and 5% CNC, which is indicated to have the potential to increase the shelf life of banana fruit. Because they prevent respiration and the water evaporation processes in bananas, these properties allow banana fruits to stay fresh longer.
Fan Blade Balancing Process on CFM56-5B Engine Airbus A320 using the Trim Balance Method Nugroho, Dimas Augie; Caturwati, Ni Ketut
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 9, Issue 1, April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.26503

Abstract

Fan unbalance is a condition of imbalance of the fan blades with respect to the axis of play and voltage. This imbalance results in the shaft bearing receiving additional centrifugal force due to unbalanced load. This condition causes excessive vibration that produces noise. Trim Balance is a method to reduce vibration by installing balancing screws of different weights on the fan blades to achieve balanced rotation. Fan trim balance can be performed on vibration sources from FAN /LPC or from LPT as they are located in one axle, thus influencing each other. The unit of vibration measurement used is Mils which shows the maximum deviation shift distance (Displacement), with a value of 1 mils = 0.001 inch, or in microns with a value of 1 μm = 1x10-6 m. According to the Aircraft Maintenance Manual (AMM) instructions, the recommended maximum vibration limit is 2 mils, for some airlines the vibration limit is tightened to 1.0 mils. Based on ISO 20816-2 standard, the recommended vibration value is 2.5 mils, with an operating threshold of 5.3 mils. The Fan Trim Balance process begins with the engine run-up process to obtain engine vibration data. During the run-up process, the EVMU will record vibrations at N1 levels of 64%, 84%, 88%, 92%, and 96%. Once the data is collected, your EV will adjust the position and size of the balance screw, which will then be replaced at the base of the fan blades. After adjustment, the engine re-run-up to review the magnitude of the vibration. The trim balance process will be repeated until the vibration level matches the specified parameters. The ratio of vibration levels before and after the trim balance process on Engine 1 is 1.5 Mils and 0.4 Mils, with a difference of 1.1 Mils, while on Engine 2 is 1.8 Mils and 0.5 Mils, with a difference of 1.3 Mils. In this case, the Airbus A320 aircraft requires two trim balance processes to ensure that the vibration level in the engine meets the feasibility parameters.
Decay Curve Analysis of a Damped Vibration System with Multi-force Perturbations Ismail, Ahmad Yusuf; Noerpamoengkas, Ardi; Sasongko, Sukendro Broto
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 9, Issue 1, April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.21902

Abstract

Perturbation in a system is one of the troublesome matters in dynamics, vibration, and control. It is not only changing the system behavior but also possibly causing a mechanical failure. This paper presents the effect of perturbations on the decay curve of a damped vibration system. The perturbations are varied from single to multiple forces to give novel knowledge completing previous studies. Additionally, the system properties i.e. damping and stiffness are also varied to provide more meaningful comprehensive information and, thus, can be used in further vibrational system developments. The result shows that the multiplication of perturbation force significantly changes the decay curve slope with unique characteristics. The variation of damping and stiffness also affects not only the vibration amplitude but also the system resonance.  

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