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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Medani : Jurnal Pengabdian Masyarakat Journal of Mechanical Engineering Jurnal Polimesin
M. Fahrur Rozy Hentihu
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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ANALISA PROSES PENGELASAN GESEK PADA PENYAMBUNGAN BAJA AISI 1010 DAN AISI 1050 DENGAN VARIASI WAKTU DAN PUTARAN SPINDEL MENGGUNAKAN MESIN BUBUT Andana, Himawan D; Hermawan, Yuni; Sakura, Rahma Rei; Trifiananto, Muhammad; Hentihu, M Fahrur Rozy
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

The development of the welding process in the current era is growing, especially in terms of components of building construction tools and machines. Friction welding is included in the type (solid state) or without filler metal (filler) in the process, the compressive force can be utilized from the friction obtained between the two workpieces to carry out the joining process. Friction welding is a solution to overcome problems that are difficult to solve using fusion welding, friction welding can be applied to two dissimilar metals while other welding methods are almost impossible. The purpose of this study was to analyze the friction welding process on AISI 1010 and AISI 1050 steel joints with variations in welding time and spindle rotation using a lathe. The combination of independent variables that can produce the highest tensile test value, namely spindle rotation of 1170 rpm and 50 seconds of welding time can produce a tensile test value of 42.55 kgf/mm2. Meanwhile, the combination of independent variables that produced the lowest tensile test value was the spindle rotation of 900 rpm and 70 seconds of welding time, namely 30.14 kgf/mm2. The most significant independent variable is spindle rotation with 80%.
Analysis of Avgas Fuel Spraying Schemes Using the ANSYS Application Approach Putra, Dimas Endrawan; Ilminnafik, Nasrul; Hentihu, M Fahrur Rozy; Kustanto, Muh. Nurkoyim; Yudistiro, Danang; Syuhri, Skriptyan N.H.
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 1 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i12024p071

Abstract

Avgas fuel consumption on Cessna trainer aircraft is very high. However, there has been little research regarding spray impacts in Cessna aircraft engines. The phenomenon of avgas spray colliding with the cylinder wall may occur during fuel injection, resulting in a changed spray radius and height, which will affect the mixing of fuel and air. In several aspects, this affects engine performance and exhaust emissions on Cessna aircraft. This research aims to determine and study the phenomenon of spray impact on avgas-fueled aircraft engines. The fuel spray in the study occurred in the combustion chamber using pressure from a fuel hand pump whose pressure was supplied from a compressor with a pressure adjusted to the original pressure on the aircraft, namely 2 Bar (30 Psi). The experiments in this research used a high-speed camera system to study the phenomenon of avgas spray on walls to get better spray distribution. The results of this research were processed using the CFD application. The result of this research is that the greater the pressure, the more concentrated the resulting jet will be on the jet wall so that the atomization of the fuel jet will be dispersed. When the burst occurs, a change of 3.80e+00 occurs compared to other burst pressures.
Studi Eksperimen Variasi Laju Aliran Pendinginan dan Pelapisan Kaca Film pada Panel Surya Bersistem Tubular Cooler Hardiatama, Intan; Devlin, Nigel Gavriel; Mulyadi, Santoso; Sutjahjono, Hary; Hentihu, Fahrur Rozy; Ilminafik, Nasrul; Trifiananto, Muhammad
Jurnal Rekayasa Mesin Vol. 19 No. 2 (2024): Volume 19, Nomor 2, Agustus 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i2.5360

Abstract

Panel surya dapat mengubah energi matahari menjadi listrik, Penggunaan panel surya masih memiliki kendala, salah satunya adalah efisiensi daya keluaran yang masih rendah. Salah satu cara untuk meningkatkan efisiensi daya keluaran panel surya adalah dengan mengatur temperatur panel surya. Temperatur panel surya yang terlalu tinggi akan mengurangi efisiensi panel surya, sehingga diperlukan sistem pendinginan untuk menjaga temperatur panel surya tetap pada temperatur yang optimal. Variasi laju aliran pada tubular cooler serta pelapisan kaca film digunakan pada penelitian ini. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh tubular cooler dan kaca film pada panel surya terhadap daya keluaran, efisiensi maupun temperatur yang dihasilkan. Metode penelitian yang digunakan adalah metode eksperimental dengan menggunakan sistem pendingin tubular cooler dan kaca film pada panel. Pengambilan data dilakukan selama 6 hari dikondisi luar lapangan. Tingkat kegelapan kaca film divariasikan dan membaginya menjadi dua kelompok penelitian. Pada penelitian pertama digunakan kaca film 0% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Pada kelompok penelitian kedua menggunakan kaca film 20% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Hasil penelitian pada kelompok pertama menunjukkan panel surya mengalami penurunan temperatur terbesar hingga 11,69%. Penuunan temperatur yang terjadi, menghasilkan peningkatan daya keluaran hingga mencapai 31,88% dibanding panel tanpa pendingin. Pada penelitian kelompok kedua, penggunaan kaca film 20% sangat efektif dalam menurunkan temperatur panel hingga 15,84%, tetapi mengalami penurunan daya keluaran. Penurunan ini disebabkan karena adanya pengurangan intensitas matahari yang diterima oleh panel.
Karakteristik Semburan Bahan Bakar Aviation Gasoline dengan Nozzle Pesawat Cessna 172S Ilminnafik, Nasrul; Dimas Endrawan, Putra; M Fahrur Rozy, Hentihu; Muh. Nurkoyim, Kustanto; Danang, Yudistiro
Journal of Mechanical Engineering Vol. 1 No. 1 (2024): January
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jme.v1i1.2182

Abstract

Avgas fuel is fuel from aviation engines, namely piston engine type aircraft, where the spray of this fuel is very influential on the life of a piston type aircraft engine. The characteristics of avgas fuel bursts, namely the distance, temperature and shape of the spray, are rarely studied in Indonesia, so with using experimental and varied data collection techniques, we obtained the characteristic results of the avgas type fuel spray and its mixture, where the mixture of 20% ethanol with a distance of 21 cm at a pressure of 3 bar is the lowest point of the fuel mixture spray temperature, namely reaching 15oC, the effect of The mixture of fuel with ethanol means spots on the walls and combustion chamber due to the mixture of alcohol containing water so that traces and water spots can become crust on the combustion chamber.
PENGARUH PARAMETER PEMESINAN BUBUT TERHADAP KEKASARAN PERMUKAAN PADA BAJA AISI 4340 Adha Mahendra, Erlian; Hermawan, Yuni; Triono, Agus; Rozy Hentihu, M. Fahrur; Sakura, Rahma Rei
STATOR: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2025): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

This research evaluates the influence of lathe machining parameters, such as spindle speed,cutting speed, and feed depth, on the surface roughness (Ra) on the wheel axle of an electric car madefrom AISI 4340 steel. Measurements were carried out using a TR220 surface roughness tester machine,which recorded the highest roughness of 10.107 μm and the lowest was 4.041 μm. The results showedthat feed speed contributed 51.24%, spindle speed 35.82%, and cutting depth 12.94% to surfaceroughness.The optimal combination of machining parameters to produce a surface with low roughness is aspindle speed of 770 m/min, a cutting depth of 0.5 mm, and a feed speed of 120 mm/s. Small infeed depths are ideal for producing smooth surfaces, but compromises may be necessary for production efficiency. In addition, high cutting speeds provide optimal results if heat and tool wear can be controlled. Optimizing these parameters is critical to improving product quality, performance and lifetime.Keywords: Surface Roughness, AISI 4340 Steel, Lathe Machining
Impact of excess air on the performance and emissions of an ethanol-fueled si engine Ilminnafik, Nasrul; Saputra, Toni Haikal; Rozy Hentihu, Muhammad Fahrur
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.6228

Abstract

Ethanol-blended fuels, such as E60 (60% ethanol and 40% gasoline), have gained interest as an alternative to conventional fuels due to their potential to improve engine performance and reduce emissions. However, the effect of excess air on combustion characteristics remains a key factor in optimizing efficiency. This study investigates the impact of varying excess air levels on the performance and emissions of a 100 cc four-stroke spark ignition (SI) engine fueled with E60. The engine was connected to a Prony brake for performance testing, while exhaust emissions were analyzed using a gas analyzer. Results indicate that an excess air level of 22 L/m produced the highest power output (2.48 kW at 1600 rpm) and maximum torque (15.38 N·m at 1200 rpm). Additionally, at 22 L/m, the lowest fuel consumption of 0.110 kg/kWh and the lowest CO emissions were observed. However, at 23 L/m, a decline in performance was noted, likely due to incomplete combustion. The findings suggest that optimizing excess air in ethanol-fueled SI engines enhances performance and minimizes emissions. These insights contribute to the development of efficient combustion strategies for ethanol-based alternative fuels in small-scale transportation applications.
Co-Authors Abdul Hadi Djaelani Abdul Hadi Djaelani, Abdul Hadi Adha Mahendra, Erlian Agus Triono Ahmad Adib Rosyadi Ahmad Zainuri Andana, Himawan D Danang Yudistiro Danang, Yudistiro Dedi Dwilaksana Devlin, Nigel Gavriel Dhimas Ilhamsyah Dimas Endrawan, Putra Dodi Setiabudi Hari Arbiantara Basuki Hary Sutjahjono Ilminafik, Nasrul Imam Sholahuddin Intan Hardiatama Kristianta, Franciscus Xaverius Kustanto Muh. Nurkoyim Kustanto, Muh. Nurkoyim Moch. Agus Choiron Moch. Agus Choiron Mochamad Asrofi Muh. Nurkoyim, Kustanto Muhammad Trifiananto Nasrul Ilminnafik Putra Dimas Endrawan Putra, Dimas Endrawan Rahma Rei Sakura Salahuddin Junus Santoso Mulyadi Saputra, Toni Haikal Syuhri, Skriptyan N.H. Syuhri, Skriptyan Noor Hidayatullah Taufik Taufik Yudhistiro, Danang Yuni Hermawan