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Rizal Mahmud
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Institut Teknologi Adhi Tama Surabaya Jl. Arief Rahman Hakim No. 100, Surabaya, East Java, Indonesia 60117
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Journal of Mechanical Engineering, Science, and Innovation
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 2776933X     EISSN : 27763536     DOI : https://doi.org/10.31284/j.jmesi
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering
Journal of Mechanical Engineering, Science, and Innovation (JMESI) is a peer-reviewed journal in English published two issues per year (in April and October). JMESI dedicated to publishing quality and innovative research in the field of mechanical engineering and science, thereby promoting applications to engineering problem. It encompasses the engineering of energy, mechanical, materials, and manufacturing, but it is not limited to scopes. Those are allowed to discuss on the following scope: Energy: Energy Conversion, Energy Conservation, Renewable Energy, Energy Technology, Energy Management. Mechanical: Applied Mechanics, Automobiles and Automotive Engineering, Tribology, Biomechanics, Dynamic and Vibration, Mechanical System Design, Mechatronics. Material: Material Science, Composite and Smart Material, Micro and Nano Engineering, Powder Metallurgy. Manufacturing: Advanced Manufacturing Techniques, Automation in Manufacturing, Modelling, and Optimization of Manufacturing Processes.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 6 Documents
 1 
Search results for , issue "Vol 3, No 1 (2023): (April)" : 6 Documents clear
Experimental Investigation of Heat Transfer in a Flat-wall Impinging Diesel Spray Flame under Diesel-like Conditions Safiullah Safiullah; Samir Chandra Ray; Iis Rohmawati; Rizal Mahmud
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.4512

Abstract

The heat loss through the walls of Internal Combustion Engines (ICEs) needs to be minimized and improved since it has a detrimental impact on the overall thermal efficiency of the engine. This study focuses on investigating heat transfer in a flat-wall impinging diesel spray flame, simulating diesel conditions, to optimize engine parameters. The effects of factors such as various injection pressures, nozzle hole diameters, impingement distances, and oxygen concentrations are analysed in combined and individually. Experimental techniques, such as high-speed imaging, heat flux sensors, and thermocouples, are used to visualize spray flame, measure heat flux profiles and temperature distributions, respectively. Preliminary results and their implications on heat transfer and heat loss are discussed. Regarding the parametric studies investigating the effect on wall heat loss under conditions similar to those of a small diesel engine, it was observed that the transferred heat on the wall was significant in certain conditions. These results emphasize the effectiveness of manipulating the injection rate profile as a viable step to suppress the heat transfer through the wall.
Experimental Study of Spark Ignition Engine Performance under Different Electronic Control Units, Hole Injectors and Spark Plugs Aureo Adriyanto Da Costa Amaral; Naili Saidatin; Hasan Syafik Maulana
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.2992

Abstract

The passage discusses the use of technology in vehicle fuel systems, specifically the injection system technology that is replacing conventional fuel systems. One crucial component of the fuel injection system is the Engine Control Unit (ECU), which controls the distribution of current to all engine components. While standard ECUs used on motorcycles today have limitations, racing ECUs provide more quality and can improve engine performance. The study aims to evaluate the engine's performance after modifications with an upgraded racing ECU using an 8-hole injector and racing spark plugs in the ignition system to enhance the motorcycle's performance. The methods and analysis section details the tools utilized, including the chassis dynamometer, and the parameters used in the study. The results and discussions section presents the collected data and compares it with previous studies to validate the observations.
Cover and Editorial Page Ahmad Anas Arifin
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.4539

Abstract

Simulation Performance Analysis of Shell and Tube Heat Exchanger Using Comsol Multiphysics 5.6 Software Yety Setyo Ningrum; Ririn Martin Erinda; Made Arsana; Erlinda Ningsih; Anthony Francis Rajan
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.3544

Abstract

A heat exchanger is a very important tool in the fields of engineering and industry, especially in energy conversion. This study was aimed at determining the effects of hot and cold fluid flow velocity on the overall heat transfer coefficient (UA) and effectiveness in shell and tube heat exchangers using COMSOL Multiphysics 5.6 software. Another research objective was to observe the phenomena of heat transfer in the shell and tube type heat exchanger at each hot and cold fluid flow velocity. The heat exchanger was designed with a total length of 800 mm and equipped with 18 tubes having a diameter of 2 in and a length of 600 mm. The material used for tube and shell construction was stainless steel. A simulation was carried out using COMSOL Multiphysics 5.6 software to determine the performance of the designed heat exchanger. The results of this simulation indicated that the effects of hot and cold fluid velocity were directly proportional to the value of UA. The heat exchanger have result the smallest UA value of 80.062 W/m2.K, meanwhile the highest UA value of 174.950 W/m2.K. The heat exchanger have result the minimum effectiveness value of 22.305% and the maximum effectiveness value of 52,047%. The second result is phenomenon stating that the surface temperature of the shell and tube would change along with the increasing velocity of both hot and cold fluids, signifying the heat transfer such as conduction and convection from the fluid to the shell or tube.
Techno-Economic Analysis of the Production of Magnesium Oxide Nanoparticles Using Sol-Gel Method Anisa Noorlela; Asep Bayu Dani Nandiyanto; Risti Ragadhita; Meli Fiandini; Tedi Kurniawan
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.3870

Abstract

The purpose of this research is to determine the feasibility of a project in producing magnesium oxide (MgO) nanoparticles using the sol-gel method and to evaluate it from a technical and economic point of view. The sol-gel method is a method that is often used by industry because the process is simpler. Assessment from a specialized point of see is done by calculating the stoichiometry, whereas assessment from a financial viewpoint is decided by a few parameters, such as deciding Gross Profit Margin (GPM), predicting Payback Period (PBP), predicting Cumulative Net Present Value (CNPV), etc. The results of the technical analysis appear that the overall fetched of the gear to create 1,875 kg of MgO nanoparticles per day is 45,373 USD. Payback Period analysis appears that the venture pays off after more than three a long time. This venture is able to compete with PBP capital advertise measures since the venture will return in a brief time. Based on the economic evaluation, it can be concluded that this project is very promising if it is anticipated that losses will occur due to changes in several ideal conditions. The result of this study about are anticipated to be a reference for building more economical, efficient and high-demand MgO nanoparticle production projects.
Wavy Leading Edge (WLE) Influence on a Rectangular Wing Using an Unsteady Analysis Approach Iis Rohmawati; Hiroshi Arai; Ika Nurjannah
Journal of Mechanical Engineering, Science, and Innovation Vol 3, No 1 (2023): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2023.v3i1.4477

Abstract

A rectangular wing with Wavy Leading Edge (WLE) effect was investigated experimentally and numerically. This research was carried out with the NACA 0018 profile. The morphology of humpback whale flippers, which are blunt and rounded in a specific pattern, inspired the design of the WLE. The rectangular wing was explored in pitching motion with a reduced frequency of k = 0.25 and varied aspect ratios. Multiple aspect ratios (AR) of the rectangular wing have been evaluated to determine the best wing aspect ratio, notably 3.9, 5.1, and 7.9. Only at AR 3.9 and 5.1 does the WLE perform efficiently in both upstroke and downstroke motion. WLE has a sinusoidal function shape. The improvement of lift force was stronger during upstroke motion than during downstroke motion. The stall is minimized during the pitching motion of the WLE wing, according to the numerical simulation. This result could be applied to fin stabilizers or wind turbines.

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