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Hamdan Akbar Notonegoro
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Department of Mechanical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa Jl. Jend. Sudirman Km. 3 Cilegon,
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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 VI, Nomor 2, October 2020" : 5 Documents clear
Fitness For Service Assessment of Bulged Sewage Tank kasda kasda; Hari Din Nugraha; Rachman Setiawan
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9142

Abstract

Based on the visual inspection and measurement, bulging was found on the Sewage Tank. There are cracks found in some areas of welded joint on the tank wall. The suitable recommendation needs to be found in order the equipment to be operated safely and reliably. The finite element simulation is aimed at estimating the loading experienced by the tank prior to the damage, and providing recommendation for repair,  replacement or other suitable options. In order to estimate the cause of bulging, several  steps have been carried out. The sewage tank is modelled using a finite-element based software, under a normal up to the maximum allowable loading condition, using a linear-static analysis. Based on finite element simulation, under normal loading  of 0.15 bar with 6 mm thickness, the tank is considered safe with a safety factor is 2.87, compared with a minimum specified Yield Strength of material of 267 MPa. Whereas, under the high loading of 0.4 bar, the safety factor drops to 1.50. Due to estimated loading case that caused the permanent deformation, some of the tank walls experience tensile residual stress. This condition is considered unsafe. Therefore, removal of the residual stress is required.
Partial Discharge of Polyurethane/ Organoclay Composite Coated on Aluminum Conductor Overhead Lines Bambang Soegijono; Ova Kurniawan; Hamdan Akbar Notonegoro; Arief Syarifuddin Fitrianto
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9233

Abstract

Aluminum conductor have been used worldwide as the primary conductive materials for high voltage electrical transmission lines. The partial discharge behavior of the aluminum conductor have been obeserved during operation due to the transmission line's performance to serve electricity. The partial discharge of aluminum alloy coated by polyurethane/organoclay (PClay) composite material was studied. PClay composites were prepared by adding organoclay with different content in polyurethane as a matrix then coated on an aluminum conductor sample. A partial discharge test was conducted to obtain the behavior of partial discharge versus voltage. It was found that an escalation of organoclay content in the polyurethane reduce partial discharge appears.
Measurement of Geometric And Functional Accuracy With ISO 1710 Standard on Feasibility of Welding Bending Test Equipment Hardi Arya Pratama
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9013

Abstract

The bending test tool is a machine used for the bending strength testing process to determine the mechanical properties of metal materials and welded joints. Therefore a machine needs to have machine elements with ideal functional and geometric characteristics. The frame, hydraulics, and specimen mounts are examples of important machine elements in bending test machines. The ISO 1710 standard which is applied in functional and geometric testing of bending test equipment is expected to help analyze the test so that the bending test tool becomes more accurate the test results. The expected accurate category is the size, shape, and pressure applied to the specimen as desired. The accuracy of bending test equipment performance is very important in the manufacturing process to produce high-quality products. Testing includes functional on the frame by comparing actual dimensions and design, welding strength by comparing manual calculations and actual welding tests, and testing cylinder strength by comparing manual calculation of cylinder selection with the actual operation of cylinders on bending test equipment, and geometric testing, namely measuring flatness with deviations. permissible straightness 0.02mm per 1000mm, straightness with an allowable deviation of 0.025mm per 300mm and straightness 85 ° -90 ° in welded joint bending test equipment. The geometrical test results of flatness measurement at datum A using a waterpass are stated not to exceed the permitted limits with a flatness result of 0 °, the alignment test of the frame against datum A using a waterpass is still in accordance with the allowable deviation limits with the test results of the right side 89.7 ° and the left side 89.8 °, the test the alignment of the cylinder with the dial gauge is stated to be still in accordance with the permissible deviation with the results of the X-axis 0 mm and Y-axis 0 mm. measuring ruler with the results of each predetermined measurement point is 800 mm, geometric deviations were found on the flatness test of the specimen jig holder in the longitudinal and transverse directions, namely 0.2 ° or 0.88 mm on the backside of the stand or the third measurement, this is probably due to because the thickness of the diameter welded mount, it is highly recommended to re-weld so that the test results are in accordance with the permitted deviation. The results of the functional testing of the bending test equipment are stated to be able to carry out tests with an accuracy of 95-99% with details of the comparison of the dimensions of the frame with the actual test, the functional testing of the frame based on the strength of the welding and the functional testing of the cylinder is still below the allowable limit.
Investigation of The Decay of a Single vortex with PIV Technique Surjo Abadi Kencana Tunggal
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9004

Abstract

The formation and development of a single vortex is investigated in a wind tunnel. The wake from a lifting rectangular wing based on CLARK-Y profile of 11.7% is studied up to 80 chords downstream. Digital particle image velocimetry is used to measure the velocity field in the cross stream plane from which is the vortex is measured. Two different experimental test were carried out in two different conditions of the tunnel, without and with grid. From the first condition, the vortex is observed to be quite stable and long-lived. A correlation for the peak tangential velocity uθ,max and the vortex core rc has been compared with the Lamb-Oseen model, and it gives a good agreement. The circulation Γ is observed to be proportional to the free-stream U∞ (range 8 − 20 m/s) and the angle of attack α (range 1−12 deg). The vorticity ω, however, diffuses over time within the growth of the vortex core rc. This growth can be approached by the Squire model. Apparently, the vortex characteristics become weaker when the experiments are performed under grid turbulence condition. Due to the influence of the grid turbulence, some experiments give inconsistent result. This makes difficult to draw conclusions. However, still some interesting information is found in this case.
Effect Of Deflector Angle Into Various Blades Configuration Of Single Stage Vertical Axis Savonius Hydro Turbine Performance Gad Gunawan; Doddy Suanggana; Yun Tonce Kusuma Priyanto
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.8950

Abstract

Electrical energy cannot be separated from human life. Today, the exploitation of energy leads to renewable energy. One of the renewable energy is water flow energy. The Savonius turbine is a type of water turbine which is suitable for low flow velocity. One method of increasing the performance of the Savonius Turbine is by using a deflector. This study aims to see the effect of using a deflector on the performance of the Savonius Turbine. The methodology used in this research is testing with variations in the number of turbine blades and deflector angle. The number of turbine blades used were two, three, and four blades, while the deflector angles used were 0°, 20°, 40°, 60°, and 80°. The result show that the using a deflector angle of 80° make turbine inlet flow is better. The best performance is obtained on the three blades Savonius Turbine and 80° deflector angle with  power  0.154 Watt and coefficient of power 0.132.

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