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All Journal Rekayasa Mesin Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Muhamad Maris Al Gifari
Universitas Pendidikan Indonesia
Automotive Engineering Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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DEVELOPMENT OF ANDROID-BASED LEARNING MEDIA TO IMPROVE STUDENT UNDERSTANDING IN DIESEL MOTOR COURSES Khoer, Miftahul; Mubarak, Ibnu; Al Gifari, Muhamad Maris
Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) Vol 8, No 2 (2021): Desember 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v8i2.41029

Abstract

This study aims to create an android-based learning media that is feasible to be applied in research and used in assisting the learning process and to determine the effect of using learning media in increasing student understanding of Diesel Motor courses, this is because face-to-face learning is replaced by online learning The two-way learning process is difficult to do and causes a lack of understanding of students regarding Diesel Motor courses, to overcome this, interesting and interactive learning media are needed. The method in this study uses RD (Research and Development) with a learning media development model in the form of ADDIE (Analysis, Design, Development, Implementation, Evaluation), and uses aresearch one group pretest posttest design. The sample in this study used a purposive sampling technique with the research subject of 2019 Automotive Engineering Education undergraduate students who were contracting Diesel Motor courses, researchers took a sample of 40 people. The learning media products that have been made are suitable for use based on the validation of material experts and media experts with very feasible categories. The results of this study indicate an increase in learning outcomes when viewed from the average pre-test score of 31.20 and the average post-test score of 37.80 as well as the acquisition of a significance test using the t-test (Paired Sample t-test). with a significance value of 0.000, this increase is caused by the use of learning media that has been made, so the use of this learning media has a good impact in increasing student understanding of the Diesel motor course, in addition, this learning media also adds insight to students in using technology, especially Android for learning purposes.
DEVELOPMENT OF ANDROID-BASED INTERACTIVE MULTIMEDIA AS TEACHING MATERIALS FOR THE IC REGULATOR FILLING SYSTEM Mulyana, Yana; Mubarak, Ibnu; Al Gifari, Muhamad Maris
Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) Vol 9, No 1 (2022): Juni 2022
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v8i2.40963

Abstract

The purpose of this research is to produce android-based interactive multimedia that is feasible as a learning medium with a good response from students on the IC regulator charging system material. The method used in this study is Research and Development (RnD) with the ADDIE development model. The population in this study were students of the automotive engineering education study program and the automotive engineering concentration mechanical engineering study program. The sample in this study was 40 students of the automotive engineering education study program class of 2019. The research instrument used is a structured questionnaire. The results of the validation of the material experts get a percentage value (89%) from the learning aspect, content aspect and evaluation aspect. The results of the validation of media experts get a percentage value (91%) from the display aspect and the programming aspect. The results of student responses get a percentage score (85%) from the aspect of quality of content and objectives, aspects of instructional quality and aspects of technical quality. Interactive multimedia was declared very feasible according to material experts and media experts and received good responses from students.
DESAIN AWAL RUANG BAKAR PREMIXED UNTUK TURBIN GAS ULTRA MIKRO (TGUM) DENGAN MENGGUNAKAN PENDEKATAN TEMPERATUR ADIABATIK Al Gifari, Muhamad Maris; Hartono, Firman; Darmanto, Prihadi Setyo; Reksowardojo, Iman Kartolaksono
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1613

Abstract

The need to develop ultra-micro gas turbine (TGUM) applications is getting higher, especially as a portable energy source. Many applications whose energy requirements cannot be met by current batteries but can be handled by TGUM. The energy density of kerosene is 45 times greater than that of current batteries. The development of ultra-micro gas turbines has been carried out for more than 20 years. The challenge faced in the TGUM development process was manufacturing technology, but manufacturing developments continue to advance over time, meaning that one day high-speed bearing technology may be achieved. The development of an ultra-micro gas turbine can be started from the design of the combustion chamber. The basic concept of determining the initial size of the diameter as the initial reference length is widely available and established, but this reference is only for combustion chambers with non-premixed combustion. No one has discussed the determination of the size of the premixed combustion chamber. The basis for the initial determination of the combustion chamber in this article is the determination of the adiabatic temperature, and the energy balance equation which is simplified to become Black's Principle. This method describes the relationship between the diameter of the combustion chamber, airflow dilution portion and the flame propagation speed that must be met. This method also determines the value of the equivalence ratio, and also length of combustion chamber based on SHR (Space Heating Rate) that must be taken. The results of this method when entering the condition of the combustion chamber inlet 379 K, 2.05 bar, and outlet 879 K, 1.79 bar produce a reference decision of 5 cm diameter, flame speed of 6 m/s, equivalent ratio of 0.8 and 74% cooling portion for a gas turbine mass flow rate of 85.7 g/s.
DESAIN AWAL RUANG BAKAR PREMIXED UNTUK TURBIN GAS ULTRA MIKRO (TGUM) DENGAN MENGGUNAKAN PENDEKATAN TEMPERATUR ADIABATIK Al Gifari, Muhamad Maris; Hartono, Firman; Darmanto, Prihadi Setyo; Reksowardojo, Iman Kartolaksono
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1613

Abstract

The need to develop ultra-micro gas turbine (TGUM) applications is getting higher, especially as a portable energy source. Many applications whose energy requirements cannot be met by current batteries but can be handled by TGUM. The energy density of kerosene is 45 times greater than that of current batteries. The development of ultra-micro gas turbines has been carried out for more than 20 years. The challenge faced in the TGUM development process was manufacturing technology, but manufacturing developments continue to advance over time, meaning that one day high-speed bearing technology may be achieved. The development of an ultra-micro gas turbine can be started from the design of the combustion chamber. The basic concept of determining the initial size of the diameter as the initial reference length is widely available and established, but this reference is only for combustion chambers with non-premixed combustion. No one has discussed the determination of the size of the premixed combustion chamber. The basis for the initial determination of the combustion chamber in this article is the determination of the adiabatic temperature, and the energy balance equation which is simplified to become Black's Principle. This method describes the relationship between the diameter of the combustion chamber, airflow dilution portion and the flame propagation speed that must be met. This method also determines the value of the equivalence ratio, and also length of combustion chamber based on SHR (Space Heating Rate) that must be taken. The results of this method when entering the condition of the combustion chamber inlet 379 K, 2.05 bar, and outlet 879 K, 1.79 bar produce a reference decision of 5 cm diameter, flame speed of 6 m/s, equivalent ratio of 0.8 and 74% cooling portion for a gas turbine mass flow rate of 85.7 g/s.
Analisis Karakteristik Aerodinamika Ferrari F2004 pada Variasi Kecepatan Aliran Udara Menggunakan Computational Fluid Dynamics Eka Muhammad Dzikra; Yusep Sukrawan; Tatang Permana; Muhamad Maris Al Gifari; Ridwan Adam Muhamad Noor
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.477

Abstract

This study analyzes the aerodynamic characteristics of the Ferrari F2004 at different airflow speeds using Computational Fluid Dynamics (CFD). Autodesk CFD simulations were conducted at 150 km/h and 350 km/h to analyze pressure distribution, velocity, streamlines, drag, downforce, and aerodynamic coefficients. The results show that increasing airflow speed intensifies pressure and velocity variations and wake formation. Drag increased from 422.012 N to 2,295.60 N, while downforce increased from 151.026 N to 818.567 N. Meanwhile, the drag coefficient remained relatively stable, from 0.3053 to 0.3050, and the lift coefficient changed from −0.1093 to −0.1088. Increasing airflow speed primarily increases the aerodynamic loads on the vehicle.
Analisis Pengaruh Bentuk dan Diameter Comb terhadap Karakteristik Aliran Miniatur Wind Tunnel Menggunakan Computational Fluid Dynamics Fajrin Gimnastiar; Yusep Sukrawan; Tatang Permana; Muhamad Maris Al Gifari; Ridwan Adam Muhamad Noor
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.482

Abstract

This study aimed to determine the comb configuration that provides the most uniform flow distribution with low turbulence and pressure loss. Four comb configurations, namely circular, square, 3 mm-diameter hexagonal, and 6 mm-diameter hexagonal configurations, were analyzed using Autodesk Computational Fluid Dynamics under steady-state conditions with an inlet velocity of 30 m/s. We evaluated flow characteristics based on mean velocity, velocity standard deviation, coefficient of variation, uniformity index, turbulence intensity, and pressure drop. With a test-section hydraulic diameter of 89 mm, the Reynolds number of the main flow was calculated as 1.81 × 10⁵. The results showed that the 6 mm-diameter hexagonal comb performed best, with a mean velocity of 29.982 m/s, a velocity standard deviation of 0.517 m/s, a coefficient of variation of 1.725%, a uniformity index of 99.281%, a turbulence intensity of 0.608%, and a pressure drop of 0.592 kPa. This configuration produced the most uniform velocity distribution, low velocity fluctuation and turbulence intensity, and low pressure loss. Therefore, the 6 mm-diameter hexagonal comb was selected as the best configuration.
Analisis Nozzle dan Diffuser terhadap Distribusi Aliran pada Open Circuit Wind Tunnel menggunakan Simulasi Computational Fluid Dynamic (CFD) Sahrul Barokah; Yusep Sukrawan; Tatang Permana; Muhamad Maris Al Gifari; Ridwan Adam Muhamad Noor
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.487

Abstract

This study analyzes the effect of the nozzle and diffuser on airflow distribution in an open-circuit wind tunnel using Computational Fluid Dynamics simulation. The model was created in Autodesk Inventor and simulated in Autodesk CFD at an airflow velocity of 6 m/s, under steady-state conditions, using the k-ε turbulence model. The simulation stages included model development, meshing, boundary condition setup, and post-processing. The simulation results show that the maximum velocity at the nozzle reached 5.3 m/s, increased to 21,08 m/s at the test section, then decreased to 19,17 m/s at the diffuser, with static pressure gradually increasing from 101.150 Pa at the nozzle to 101.297 Pa at the diffuser, indicating a pressure recovery process consistent with the diffuser function. This study's novelty lies in the stepwise quantitative analysis of velocity and pressure distributions at each segment of a laboratory-scale open-circuit wind tunnel using Autodesk CFD simulation, supported by a mesh-independence test, which has not been widely reported in similar previous studies.
Co-Authors Darmanto, Prihadi Setyo Eka Muhammad Dzikra Fajrin Gimnastiar Hartono, Firman Ibnu Mubarak Iman Kartolaksono Reksowardojo Khoer, Miftahul Muhammad Noor, Ridwan Adam Sahrul Barokah Tatang Permana, Tatang Yana Mulyana