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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal Elementer (Elektro dan Mesin Terapan) Jurnal Teknik Mesin Jurnal Rekayasa Energi dan Mekanika Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurnal Polimesin
Akhyan, Amnur
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Variasi Tebal Orifice Lubang Tunggal Terhadap Pressure Drop dan Discharge Coefficient Pada Daerah Entrance dan Fully Developed Akhyan, Amnur; Arviansyah, Mhd.
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2235

Abstract

Orifice adalah sebuah alat yang diletakan di suatu aliran pipa untuk menghambat aliran fluida dan menimbulkan pressure drop. Pengukuran laju aliran (flow rate) didapat dari perbedaan tekanan karena adanya pressure drop tersebut. Pada penelitian kali ini menganalisa tentang pengaruh perbedaan variasi tebal plat orifice yang digunakan mulai dari tebal 2 mm – 4 mm dengan variasi kenaikan tiap 0.5 mm dengan diameter lubang orifice 15 mm dengan jenis plat orifice yang digunakan yaitu squared edge concentric orifice plate. Peletakan orifice ditempatkan pada daerah yang profil kecepatannya masih berubah-ubah atau disebut dengan entrance region dan pada daerah yang telah berkembang sepenuhnya atau disebut fully developed region dengan diameter dalam pipa yang digunakan 25.4 mm (1 Inch) dan rasio beta (β) 0.6. Kemudian disepanjang daerah entrance dan fully developed masing-masing dipasangkan 12 titik piezometer sepanjang 85 cm dengan posisi peletakan 6 titik piezometer sebelum katup orifice dan 6 titik piezometer setelah katup orifice. Pada percobaan ini menggunakan aliran dengan nilai Re 9800 dan dilakukan pada temperature 27 °C.  Hasil penelitian menunjukkan bahwa tekanan di 6 titik sebelum melewati orifice pada daerah entrance tidak konstan berbeda dengan tekanan pada daerah fully developed yang konstan. Tekanan setelah melewati orifice pada daerah entrance angkanya juga selalu berubah. Nilai irrecoverable pressure drop terendah yaitu pada daerah entrance dengan tebal plat 2 mm yaitu sebesar 538.47 Pa, sedangkan untuk nilai tertingginya yaitu pada daerah fully developed dengan tebal 2.5 mm dengan nilai 763.65 Pa. Discharge coefficient  (Cd) nilainya berkisar antara 0.628 - 0.703 dengan nilai yang paling mendekati debit aktualnya adalah pada daerah fully developed tebal 4 mm dengan nilai 0.703.Kata kunci: Orifice, Entrance, Fully Developed, Pressure Drop, Discharge Coefficient
Mesin Pencetak Pilus Menggunakan Screw Pendorong Yunus, Muhammad Afdhal Yunus; Edilla; Akhyan, Amnur
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 9 No 2 (2023): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v9i2.6102

Abstract

Pilus is one kind of fried food and the shape like cylinder with variety length of cuts. Pilus makes by wheat flour, eggs, salt, and water. In general, production of pilus still manually use human power to make and cut pilus. Therefore, this pilus machine was created to make it easier and faster for human to create pilus. This pilus machine use a 1-phase AC motor to spin screw press and DC motor used to spin the cutter blade. ATMega8535 functionate as a microcontroller to control the speed and duration of motor. The Screw press is specially design, so it can press the dough out with two different sides. This Pilus Machine has capacity to produce pilus average 6kg / hr. The average current of ac motor needs 6,11 A. Average percentage of initial dough result with pilus result is 90.8%. This pilus machine can produced pilus with a length of 1cm, 2cm, dan 3cm.
Rancang Bangun Oven Pengasapan Ikan Asap Menggunakan Metode Rotary Novison, Roni; Nugraha, Nurcahya; Akhyan, Amnur
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1265

Abstract

Smoked fish has a high economic potential to be used as a business or to cook household food, so it is appropriate if this opportunity is developed by the community. One of the areas producing smoked fish is Kampar Regency. Based on the results of a survey conducted in the area of ​​the Koto Village Mosque (Kampung Patin) Kampar Regency, it was still found that the processing process carried out by the local community still uses traditional equipment, such as using rambutan wood as fuel and a fire stove placed outside the house during the smoking process, so that the temperature of the furnace combustion cannot be controlled properly and the quality of the resulting product is not good for large-scale production, because smoke and ash often stick to the fish meat, and the fish is not evenly cooked. One way that can be done to facilitate the process of making smoked fish is to create a smoking room that can inhibit heat energy by using a rotating system that can rotate. Small holes are also made in the iron pipe in the smoking room as a flow of smoke which aims to make the fish evenly cooked. The smoking process in the oven uses a rotating system or the fish will be rotated in the oven. This study was conducted in order to produce average smoking and this study includes the quality of appearance, odor quality, taste quality, texture quality, mushroom quality, and mucus. The smoking was carried out for 2 hours, 3 hours and 4 hours. The smoking oven was designed to have a smoke chamber capacity of 6 kg with a division of 1 kg / rack. The main part of the smoking oven machine is divided into two main parts including the smoke chamber and the combustion chamber. The smoke chamber has dimensions of 75 cm long, 50 cm wide and 120 cm high while the combustion chamber has dimensions of 100 cm long, 80 cm wide and 50 cm high. The best fish smoking results were obtained at a smoking time of 3 hours with an average fish shrinkage of 42.12%. This can be seen from the level of color and weight shrinkage.
Pengaruh Variasi Komposisi Elektroda E7016 Terhadap Hasil Pengelasan Shield Metal Arc Welding Butt Joint Material Baja SS 400 Dengan Analisa Komparatif Zaira, Jupri Yanda; Bennafi El Hasani, Oqbah; Ma’a , Mustaza; Akhyan, Amnur
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 10 No 2 (2024): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v10i2.6373

Abstract

Welding is a technique for joining metals by melting a portion of the base metal and filler metal, with or without additional metal, to produce a continuous metal joint. The aim of this research is to determine the effect of electrode composition from three brands, namely Niko Steel, Atlantic, and Kobelco, on tensile strength, bending, and impact. This study uses SMAW welding with a single V butt joint in the 1G/PA position on SS 400 steel plates, using 4.0 mm diameter electrodes. The welding results are then inspected visually and with a NDT penetrant test to ensure conformity with TWI acceptance standards. Subsequently, the workpieces are cut with a bandsaw into specimens according to ASTM E8 for tensile testing, ASTM E290 for bending testing, and ASTM E23 for impact testing. The research results show that the highest tensile test value is achieved with Niko Steel electrodes, having an average tensile strength of 792.5 MPa. In bending tests, the highest bending strength is also observed with Niko Steel electrodes, averaging 8.71kN. In impact testing, the highest average value is found with Niko Steel electrodes, at 1.1 J/mm².
Studi Numerik Penurunan Tekanan (dP) Akibat Perubahan Sudut (theta), Tipe Lubang dan Open Rasio Area (OAR) Pada Strainer Rianto, Rifan; Akhyan, Amnur; Novison, Roni; Zaira, Jupri Yanda; Haiqal, Muhammad
Jurnal Rekayasa Energi dan Mekanika Vol 5, No 1 (2025): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v5i1.82

Abstract

Pada industri minyak dan gas, sistem perpipaan merupakan komponen penting untuk mendukung proses transfortasi fluida seperti minyak mentah dan gas alam, namun dalam proses transfortasi sering kali membawa kotoran, debu, ataupun partikel padat lainnya. Fluida yang mengandung partikel padat dapat menyebabkan masalah serius dalam sistem perpipaan, oleh karena itu dibutuhkan strainer sebagai penyaring partikel padat tersebut. Meskipun strainer berfungsi sebagai penyaring, adanya strainer di jalur aliran dapat menimbulkan dampak terhadap karakteristik aliran fluida salah satunya adalah penurunan tekanan. Maka studi dinamika fluida menjadi penting dalam memahami fenomena aliran di sekitar strainer guna mengidentifikasi dan mengatasi permasalahan tersebut. Metode yang digunakan pada penelitian ini adalah pendekatan simulasi numerik Computational Fluid Dynamics (CFD) dengan geometri strainer Dp=8 dan 6 inci, diameter lubang d=6 dan 4 mm, tipe lubang staggered dan straight, ketebalan s=2mm dan fluida uji gas metana. Hasil simulasi menunjukkan pada strainer Dp 8 inci (OAR=30,68%), tipe lubang staggered dengan q=81 menghasilkan DP paling kecil yaitu 169,80 Pa. Sedangkan DP terbesar terjadi pada strainer Dp 6 inci (OAR=19,59%, tipe lubang straight dengan q=830  yaitu 1734,06 Pa.
Numerical Study of Finite Element Analysis (FEA) of Stress and Deformation in Strainer Haiqal, Muhammad; Akhyan, Amnur; Zaira, Jupri Yanda; Novison, Roni; Rianto, Rifan; Razali, Mohd Azahari bin
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 2 (2025): 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.v69i2.545

Abstract

Transportation of hydrocarbon gas in industry often carries contaminants such as scale, rust, and weld metal particles that can disrupt the flow and damage components such as compressors. Strainers are used to filter impurities before the fluid enters the main system. At high flow rates, strainers, especially perforated plates, are susceptible to structural damage. Because experimental tests are expensive and risky, Finite Element Analysis (FEA) simulations are used. This study analyzes the effect of variations in methane gas flow rates on the strength of carbon steel strainers with plate thicknesses of 0.8 mm, 1 mm, and 2 mm. The tested velocities were 7.59 m/s, 9.59 m/s, and 11.59 m/s at a pressure of 10 bars and a temperature of 55?. The results showed the highest stress at the base of the strainer: 32,826 N/m2 (0.8 mm), 30,472 N/m2 (1 mm), and 21,975 N/m2 (2 mm). The maximum deformations occurred at the strainer tip: 2.35×10-8 m, 2.91×10-8 m, and 2.82×10-8 m. All values are below the yield strength limit of carbon steel (2.5×108–5×108 N/m2), indicating a safe design against high flow loads.
Investigation of geometric effects on fluid viscosity using the falling ball method Akhyan, Amnur; Ma’a, Mustaza; Irdam, Fortinov Akbar; Alvarez, Alvin; Nugraha, Nurcahya; Nurkhamdi, Nurkhamdi
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7347

Abstract

The falling ball method, based on Stokes law, is a simple yet accurate technique for determining fluid viscosity, though its precision is influenced by factors such as wall, Reynolds, end, memory, and off-center effects. This study aims to determine the effect of spherical geometry on the fluid viscosity value represented by the sphericity factor . An experimental study was conducted to examine its accuracy of viscosity values to produce the correction factor. The sphericity factors studied were 0.993, 0.976, and 0.949. To reduce the uncertainty caused by the wall effect, the ratio db/Dt was 0.071, using a 5.8mm diameter plastic ball and SAE 40 oil fluid at 32.4°C. Terminal velocity (??) was obtained by analyzing the video of the ball falling in the fluid, which was displayed on the tracker software. The video was taken using a 1080p, 60 fps camera. Wall and Reynolds effect correction factors were used to amend experimental viscosity values. The result indicates the viscosity will be accurately determined by selecting a larger sphericity value of the ball during the experimental process. It will reduce the necessity of correction factors to obtain the value of fluid viscosity.
Co-Authors Alvarez, Alvin Arviansyah, Mhd. Bennafi El Hasani, Oqbah Edilla Haiqal, Muhammad Irdam, Fortinov Akbar Madona, Putri Ma’a , Mustaza Ma’a, Mustaza Novison, Roni Nugraha, Nurcahya Nurkhamdi, Nurkhamdi Razali, Mohd Azahari bin Rianto, Rifan Surendra, Robby Pradana Tanjung, Munir Yunus, Muhammad Afdhal Yunus Yusmar Palapa Wijaya, Yusmar Palapa Zaira, Jupri Yanda