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Turbo : Jurnal Program Studi Teknik Mesin
Published by Universitas Muhammadiyah Metro
ISSN : 23016663     EISSN : 2477250X     DOI : https://doi.org/10.24127
Core Subject : Engineering,
Mechanical Engineering
TURBO ISSN (print version) 2301-6663 & ISSN (online version) 2477-250X is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. Articles published in the journal Mechanical include results of original scientific research (original), and a scientific review article (review). Mechanical journal published by the Department of Mechanical Engineering, Faculty of Engineering, University Muhammadiyah of Metro for publishing two periods a year, in June and December with the number of articles 14-20 per year . Editors receive manuscripts in mechanical engineering from various academics, researchers and industry practitioners.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 20 Documents
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Search results for , issue "Vol 10, No 1 (2021): Jurnal TURBO Juni 2021" : 20 Documents clear
Analisis karakteristik aerodinamika telescopic wing dengan konfigurasi sayap flying wing dan glider menggunakan metode pendekatan simulasi CFD Azmi, Azhim Asyratul; Hariyanto, Satriawan Dini; Hidayat, Arif
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1340

Abstract

A telescopic wing is a shape-changing method of the aircraft wing known as the morphing wing system. Wingspan extends capability on telescopic wing increasing the aspect ratio to get a high lift force. The telescopic wing on a flying wing configuration as an external wing and glider wing as an internal wing can be used to increase the coefficient lift (CL) when carrying out special missions. The aerodynamic characteristics using the Computational Fluid Dynamic (CFD) simulation approach is presented. For the 40% internal wingspan, the highest CL increment was 12.9% at a 10o angle of attack. For the 50% internal wingspan, the highest CL increment was 14.9% at a 10o angle of attack. on the 40% internal wing, the highest coefficient drag (CD) increment was 4.7%, and the largest CD increment on 50% internal was 9.5% at the angle of attack of 20o. The pressure distribution along the internal wingspan was uneven from an angle of attack of 15o due to the wing tip vortices of the external wing. Streamline pattern shown a bubble separation from the leading edge at an internal wing root by external wing tip vortices.Keywords: Morphing wing, telescopic wing, flying wing, glider
Pengaruh temperatur biogas dan waktu penyalaan terhadap kinerja motor bakar menggunakan sistem dual fuel pertamax-biogas Mafruddin Mafruddin; Dwi Irawan; Renno Yoga Pratama; Edwin Dian Pratama
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1592

Abstract

Biogas is an alternative fuel that can be used to replace fossil fuels which are non-renewable energy sources and their availability is decreasing. The use of biogas as fuel for gasoline engines can be done using a dual fuel system (Pertamax-Biogas). The combustion process in a gasoline engine with a dual fuel system is influenced by the temperature of the biogas and the ignition timing of the ignition system. The combustion process on a gasoline engine will affect the resulting performance. The purpose of this study was to determine the effect of biogas temperature and ignition timing on the performance of a motorcycle engine with a dual fuel system (Pertamax-Biogas). The method used in this study is an experimental study by testing the performance of a motorcycle engine using a dual fuel system (Pertamax-Biogas) using fuel temperature variations of 30°, 40°, and 50°C and ignition timing variations at 11°, 13° and 15° before Top Dead Center (TDC). The results of the study it can be concluded that the biogas temperature and ignition timing affect the performance of the motor. The highest power is obtained by varying the biogas temperature to 40°C and the ignition time to 15° before TDC, meanwhile the best specific fuel consumption was obtained at a biogas temperature variation of 50°C and an ignition time of 15° before TDC.Keywords: Dual fuel, biogas temperature, ignition time, motor performance.
Implementasi RCM pada mesin diesel Deutz 20 kVA Sunaryo, Sunaryo; Japri, Japri; Yuhelson, Yuhelson; Hakim, Legisnal
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1451

Abstract

The aspect that most influences the functioning of this telecommunications service is the aspect of maintaining the equipment or assets supporting the telecommunications service. For this reason, companies must periodically measure the performance of their maintenance so that telecommunications services continue to function properly. From the data, the frequency of damage to the diesel generator engine from 2017 to 2020 is very high. In the period 2017 to 2020 there were a total of 90 times the damage, and the biggest contributor to the damage was in the 20kVA Deutz diesel engine. The purpose of this research is to know how the maintenance conditions are and to know the level of effectiveness and to know the right recommendations to increase the effectiveness of the diesel generator engine. The research method used is RCM (Reliability Centered maintanance) which is a technique used to develop scheduled preventive maintenance. Research results obtained, the component whose frequency is often damaged in the Deutz generator diesel engine is the Alternator. This selection is based on the highest number of damage frequencies and the longest downtime for approximately 3 years. Calculation of the Alternator's Mean Time to Failure (MTTF) value is 25305 hours, which means that the Alternator component will experience damage again after operating for 25305 hours. While the Mean Time to Repair (MTTR) value of the Alternator is 22.54 hours, which means that the average time to repair the Alternator component is 22.54 hours. From the calculation of the Reliability Value, the alternator is said to still have a good function because the average value interval is still in the range 0 <R (t) <1. From the analysis results obtained the value of β of 1.64205. With this value (β> 1), the appropriate types of maintenance for the Alternator component are Preventive and Time Based Maintenance.Keywords: Reliability Centered Maintenance, Critical Components, Maintenance.
Prototipe double acting cylinder transparan sebagai media pembelajaran sistem hidrolik Tri Pratomo; Rina Dwi Yani; Maryono Effendi; Dovian Iswanda; Alban Naufal; Devi Andriani
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1520

Abstract

Double acting cylinders in its application are widely used in the industry and are often applied in maintenance or repair instruments. The purpose of this research is to design and make a double acting cylinder so that the movement of the hydraulic cylinder its fluid flow can be seen clearly and easily implemented in the movement process, especially in the learning process. The research employs experimental method by directly design a transparent double acting cylinder. This transparent double acting cylinder will later be applied to the hydraulic trainer. The steps taken were determining the transparent material, making material samples for tensile tests, designing and making hydraulic cylinders, conducting hydraulic cylinder tests using Autodesk Inventor 2019. From the test results of hydraulic cylinders made from acrylic using Autodesk Inventor 2019, the minimum pressure that occurs is 1,456 MPa and the maximum pressure that occurs is 6,573 MPa, in operation, the recommended pressure 1,456 to 5,551 MPa, double acting transparent cylinder which has a transparent hydraulic cylinder length of 250 mm, thickness 11.4 mm, hydraulic cylinder inner diameter 32 mm, hydraulic cylinder locking uses 4 bolts with size M8, design pressure 23 kg/cm².Keywords: hydraulic system, double acting cylinder, transparent.
Variasi jumlah dan panjang batang pengupas pada mesin pengupas buah pinang terhadap efisiensi pengupasan buah pinang kering Iman Syahrizal; Daud Perdana
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1349

Abstract

The process of peeling betel nuts can be done manually or using a machine. Peeling betel nuts using a machine is easier and faster than peeling them manually. This study aimed to test the performance of the dry betel nut peeler machine and to prove the effect of the number and length of peeling rods on the efficiency of the peeling. The method used in this study was a randomized design experimental method consisting of two factors, namely the number of peeling rods (12 rods; 18 rods; 24 rods) and the length of the peeling rods (1 cm; 1.5 cm; 2 cm) with nine test variations. . The parameters observed included percentage of unpeeled fruit, percentage of peeled fruit with broken seeds, and percentage of peeled fruit with unbroken seeds. The highest peeling efficiency was 88% at the interaction of the number of peeling rods of 18 pieces 1,5 cm long. The lowest stripping efficiency was 66% at the interaction of the number of peeling rods of 12, 2 cm long and the average stripping efficiency was 76%. The greater the number of peeling rods, the greater the percentage of peeled fruit. The longer the peeler rod, the greater the percentage of peeled fruit with broken seeds.Keywords: dry betel nut, peeler, efficiency.
Pengaruh perubahan spasi nosel pada aliran dua fase terhadap kinerja liquid-gas ejector Supandi Supandi; Edi Karyadi; Hadimi Hadimi
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1447

Abstract

Liquid-gas ejector is an energy conversion device capable of flowing air fluid by utilizing water fluid based on the pressure difference between the two fluids without using moving parts. This study aims to determine the effect of changing nozzle spacing on the two-phase flow on the performance of the liquid-gas ejector. The method used is to carry out an experiment whose stages include: determination of nozzle spacing parameters, primary flow rate, and secondary flow rate. Then perform tests on the liquid-gas ejector installation and collect data. The test was carried out by alternately varying the nozzle spacing, primary flow rate, and secondary flow rate. Then analyze the data that has been collected to get the efficiency or performance of the liquid-gas ejector from changes in nozzle spacing. Increasing the nozzle spacing causes a decrease in the efficiency of the liquid gas ejector. The efficiency of the liquid gas ejector with nozzle spacing 5, 10, 15, 20, and 25 mm is 17.17%, 13.49%, 12.06%, 11.41, respectively. %, and 10.47%.Keywords: Nozzle spacing, flow, two phases, performance, liquid-gas ejector.
Simulasi co-combustion batubara dan biomassa tandan kosong kelapa sawit tertorefaksi (torrefied biomass) Zaenal Arifin; Amrul Amrul; Muhammad Irsyad
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1468

Abstract

Coal is still widely used as the main fuel in the industry, especially the power generation industry (PLTU), cement plants and etc. Coal is a fossil fuel whose availability is thinning and its fires produce CO2 emissions that cause a rise in greenhouse gas (GHG) concentricity. On the other biomass is an alternative energy source that is abundant, including empty bunches of oil palm (TKKS), but has poor combustion properties compared to coal when burned directly. The properties of biomass burning can be improved by certain treatment, one of which is through the process of torrefaction. Biomass torrefaction has a calorific value equivalent to sub-bituminous coal B, so it has the potential to be used as an alternative fuel for coal. The purpose of this study was to determine the maximum temperature that occurs in the burner. In this study co-combustion was conducted on simulation of ANSYS program with powder system (pulverized combustion) because this type in recent decades is widely used in industry. In this study conducted a simulation on ANSYS to determine the temperature on the burner and the concentration of emissions produced. The results showed that the simulation of co-combustion burner burner showed the maximum temperature reached 970°C.  The effect of burner and burner temperature in the form of swirl provides sufficient oxygen with more perfect combustion resulting in decreased concentration of CO2 emissions and low concentration of N2 due to higher nozzle temperature. High temperatures lower the concentration of SO2 in the burn chamber.Keyword: Co-combustion, pulverized co-combustion simulation, TKKS torrefaction, burner.
Analisa karakteristik briket campuran bahan dasar tempurung kelapa, kulit kacang, dan kulit kedelai terhadap nilai kalor menggunakan metode torefaksi microwave Kuntang Winangun; Muh. Malyadi; Achmat Rifay
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1537

Abstract

Fossil fuel is a non-renewable fuel. It is necessary to find alternative energies by converting coconut shell waste, peanut shell waste, and soybean shell waste into briquettes. This study aims to utilize agricultural waste and determine the test parameters for the value of ash content, moisture content, temperature, flame duration, and calorific value of the briquette mixture of peanut shell, soybean shell, and coconut shell with variations in composition. This research was carried out by converting coconut shell, peanut shells, and soybean shells into charcoal with a carbonization process for 3 hours, the all waste charcoals were pulverized and sieved with a 60 mesh sieve, mixed with the addition of 10% tapioca flour adhesive, printed with a pressure of 250 psi. The briquettes were dried using a microwave machine with a power of 450 watts for 30 minutes. The results showed the highest value in briquette ingredient 1 with a mixture of 30% coconut shell, 50% peanut shell, and 20% soybean shell with a good moisture content value of 6.32%, an ash content value of 0.084%, a combustion heat value of 484.90C, the duration of the combustion flame was 1 hour 50 minutes 26 seconds, and the highest heating value was 7447.964 cal/g. The calorific value that does not meet the standard material 2 with a composition of 30% coconut shell, 20% peanut shell and 50% soybean shell produces a heat below the SNI, namely 4649.299 cal/g. For moisture and ash content in all materials meet the standards.Keywords: Briquettes, coconut shell, peanut shell, soybean shell.
Investigasi Mekanisme Korosi Pada Pipa Pemanas Udara Di Pabrik Gula Pagotan Madiun Fahrudin Kurniawan; Wawan Trisnadi Putra; Munaji Munaji; Rizal Arifin
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1352

Abstract

This study aims to determine the inner surface morphology of pipes and to identify pipe corrosion products using stereo microsocope and X-ray diffraction (XRD) observations. In this study, the sample used was a piece of Blacksteel gas pipe that had been used for 107 days and 570 days with dimensions of 3 cm in length and 4 cm in diameter. The sample was taken from the Air heater Unit of the Pagotan Madiun sugar factory, East Java, Indonesia. Morphology the inside of the tube was observed with a CARL ZEISS Stemi DV4 stereo microscope (32x magnification). Furthermore, the rust material powder on the sample pipe was taken to determine the corrosion product using the XRD X'Pert PRO instrument. The results of observation by using a stereo microscope on the inner surface of air heater pipe that had been used for 107 days and 570 days indicated that the pipe surface experienced corrosion and peeling. From the results of X-ray diffraction (XRD) observations, FeOOH layer were formed from Fe2+ and OH- ions produced from O2 and H2O molecules in the smoke gas from burning bagasse. At the bottom of FeOOH layer, Fe3O4 was formed from the subsequent reaction between FeOOH and Fe2+ ions.Keywords: pipe, air heater, corrosion, smoke gas.
Pengaruh pH larutan elektrolit terhadap kuat lekat dan ketebalan hasil elektroplating bahan baja karbon rendah Asroni, Asroni; Handono, Sulis Dri; Wahyudi, Tri Cahyo; Saputra, Yogi
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1593

Abstract

Electroplating is a process of coating a solid material with a metal layer using an electric current through an electrolyte solution. The purpose of this study was to obtain the best solution pH for the thickness and adhesive strength results of electroplating, as well as the method used in various electrolyte solutions, namely pH 1.7, pH 3, pH 5, pH 7 and pH 9. The anode was used Nickel while the cathode uses ST41 Steel with dimensions of 70 mm x 50 mm x 10 mm. The distance between the anode and cathode is 10 cm and a DC current voltage of 5.5 volts with an immersion time of 20 minutes. The best coating were obtained at a variation of pH 1.7 with a result of 0.0322 mm and adhesive strength at a variation of pH 5 with a result of 26.53 MPa and pH 7 of 24.25 MPa.Keywords: Electroplating, pH variation, adhesion strength, thickness, Steel ST41, Nickel.

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