Articles
<![CDATA[Design and Performance Testing of a 3D Printed Mini DC Powered Pump for Microbubble Generator ]]>
<![CDATA[Tulus Hidayat Yusanto]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Adi Winarta]]>;
<![CDATA[I Wayan M. Managi Marlon Managi]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i4.18826
<![CDATA[Centrifugal pumps are the most commonly utilized in industries, agriculture, and households. In the microbubble generator, the centrifugal pump is driven by a DC motor for efficiency. This research was conducted to determine the optimal centrifugal pump design for microbubble generators using 3D-printed PLA material. The pump drive uses a brushless DC motor. With impeller dimensions r1=16mm, r2=26mm, β1=46.8, β2=62.8, and number of blades = 8, the resulting head is 2m at a constant operational current of 3A and a flowrate of 0 L/m. The same operational current input yields a maximum flow rate of 14 L/min with a head of 0.5 m. Maximum head exists when there is no liquid on the outlet side. At current ≥ 6.5A, there is a deviation from the previously formed trend. The input power of 58W is generated when the maximum flow rate is 25L/m. Maximum efficiency can be achieved as the input current increases to ≤6.5A and 18L/m. At conditions ≥6.5A, efficiency decreases drastically as the input current increases. This centrifugal pump design can work optimally at a constant input current of 6.5A with an input power 58W for the microbubble generator.]]>
<![CDATA[The Influence of Mounting Angle on Gurney Flap on The Aerodynamics Performance of NACA 0015 Using CFD Method ]]>
<![CDATA[Mirza Fauzan Lukiano]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Waridho Iskandar]]>
<![CDATA[ International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25481479.v8i4.18891
<![CDATA[Improving the airfoil aerodynamics is quite an essential aspect of the aviation industry. One method for improving airfoil aerodynamics involves applying passive flow control techniques. The effect of using the gurney flap as passive flow control was explored through the CFD approach with the RANS control equation and incorporating k-epsilon as a turbulence model. The airfoil model utilized in this study was the NACA 0015 airfoil operating at a Reynolds number of 1×106. This study explored three different mounting angles of the gurney flap, namely 45°, 60°, and 90°. The outcomes show that adding the gurney flap has positive results in increasing the lift and drag of the NACA 0015. An airfoil with a mounting angle flap of 45° has an average percentage increase in Cl of 23%, followed by a mounting angle flap of 60°, which is 28%, and a percentage Cl of 45% for a mounting angle flap of 90°. Meanwhile, Gurney flaps with a mounting angle of 45° can increase Cd by an average percentage of 3%, while mounting angle flap at 60° increases the Cd percentage by 4% and 5% for a mounting angle of 90°. Moreover, fluid flow visualization with pressure and velocity contours was given at AoA 10º to determine its effect on increasing lift and drag on the NACA 0015 airfoil.]]>
<![CDATA[Pengembangan dan Implementasi Aplikasi Mobile Indogalaxy di Kelompok Budidaya Ikan Cambetta Cipulir dan Betta Fish As ]]>
<![CDATA[Desta Sandya Prasvita]]>;
<![CDATA[James Julian]]>;
<![CDATA[Zackharia Rialmi]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ Jurnal Abdikom Vol 1 No 1 (2022): JURNAL ABDIKOM ]]>
Publisher : <![CDATA[Fakultas Ilmu Komputer ]]>
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<![CDATA[Di awal pandemi Covid-19 tahun 2019, budidaya ikan cupang menjadi tren masyarakat Indonesia. Bisnis ikan cupang juga menjadi sangat menjanjikan pada saat itu. Namun dipertengahan tahun 2021, bisnis ikan cupang mulai meredup dan penjualan ikan cupang pun menurun. Kelompok budidaya Cambetta Cipulir dan Betta Fish As sebagai bagian dari kelompok budidaya ikan cupang di Jakarta menjadi contoh kelompok budidaya ikan cupang yang omset pejualannya menurun drastis hingga 70% ditambah lagi keterbatasan SDM di kelompok budidaya tersebut yang membuat persoalan ini belum terpecahkan. Beberapa penjual ikan cupang mencoba beralih dengan melakukan penjualan di media sosial seperti Facebook dan Instagram, namun munculnya larangan penjualan makhluk hidup dikedua aplikasi tersebut membuat transaksi ikan cupang semakin menurun ditengah pandemi. Solusi yang ditawarkan untuk permasalahan ini adalah dengan pengembangkan aplikasi berbasis android untuk memfasilitasi proses jual beli ikan cupang. Aplikasi ini diberi nama IndoGalaxy, dibuat dengan memperhatikan kemudahan user dalam menggunakan aplikasi, mulai dari pembuatan akun, mengupgrade akun, sampai melakukan jual beli dan lelang ikan cupang. Pada aplikasi ini juga memberikan fitur tambahan untuk jual beli dan lelang ikan cupang dengan video streaming. Agar aplikasi ini dapat digunakan oleh kelompok budidaya ikan cupang, pada pengabdian kepada masyarakat dilakukan juga dilakukan pelatihan khusus untuk menggunakan aplikasi. Hasil yang didapat dari kegiatan pemberdayaan antara lain memperbaiki sistem transaksi penjualan ikan cupang di Indonesia khususnya DKI Jakarta melalui pengembangan aplikasi berbasis android, meningkatkan omset atau pendapatan kelompok budidaya ikan cupang melalui aplikasi android, mengidentifikasi potensi masyarakat khususnya kelompok budidaya ikan cupang sebagai bagian dari upaya peningkatan kualitas SDM, dan mewujudkan konsep inovasi kreatif dalam usaha peningkatan perekonomian masyarakat kelompok budidaya ikan cupang.]]>
<![CDATA[Pengaruh slot kumparan pada kinerja permanent magnet synchronous motor dengan metode komputasi ]]>
<![CDATA[Ferdyanto]]>;
<![CDATA[Idris Marbawi]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 10 No 1 (2023): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika ]]>
Publisher : <![CDATA[LPPMPK-Sekolah Tinggi Teknologi Muhammadiyah Cileungsi ]]>
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DOI: 10.37373/tekno.v10i1.323
<![CDATA[Kesadaran mengenai isu-isu energi dan lingkungan, industri otomotif mulai mengembangkan kendaraan listrik. Banyak negara dan produsen mobil besar telah banyak berinvestasi dalam penelitian kendaraan listrik. Di industri ada persyaratan dinamika torsi maksimum dan respon torsi kondisi tunak yang lebih baik. Ada gelombang yang lebih rendah pada fluks magnet motor dan torsi yang dihasilkan. Permanent magnet synchornous motor (PMSM) menjadi salah satu pilihan yang tepat. PMSM menggunakan rare-earth magnets yang telah diterapkan sebagai traction motor untuk kendaraan listrik karena memiliki efisiensi yang tinggi dan kepadatan daya. Penelitian ini dilakukan untuk mengetahui tingkat efisiensi yang disajikan dari berbagai jenis motor sinkron dengan spesifikasi motor yang berbeda dari slot type of coil untuk mengetahui motor sinkron mana yang lebih efisien. Sehingga penelitian ini dapat membantu para pengguna motor sinkron dalam menentukan rancangan motor sinkron yang sesuai dengan kebutuhan. Penelitian berjalan dengan menggunakan proses komputasi pada software Ansys Electronic 2018. Seluruh proses komputasi yang dilakukan menggunakan metode Finite Element Analysis (FEA) untuk menyelesaikan permasalahan medan magnet dan medan listrik secara sederhana. Tipe motor dengan kode C1 memiliki nilai efisiensi tertinggi sebesar 95,251% berdasarkan rasio dari input power dan output power dengan spesifikasi besarnya nilai kuat medan magnet sebesar 0,93409 Tesla dan laju kuat arus persatuan panjang sebesar 5,3208 Ampere per meter, serta motor ini mendapatkan nilai efisiensi yang optimal pada kecepatan konstan motor sebesar 13300 rpm dan pada 75 derajat sudut putar rotor saat bekerja.]]>
<![CDATA[Effects of leading-edge defects of the NACA 0015 airfoil on aerodynamic performance with various Reynolds number ]]>
<![CDATA[Ulfa Hanifah Nurhaliza]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Waridho Iskandar]]>
<![CDATA[ Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 8 No. 2 (2023) ]]>
Publisher : <![CDATA[University of Muhammadiyah Malang ]]>
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DOI: 10.22219/jemmme.v8i2.29400
<![CDATA[This study investigates and identifies the effects produced by defect on an airfoil when compared to a smooth airfoil. The defect used in this research is of the surface concaved defect (SDD) type, with a deep defect characterized by a smooth sunken deformation. The opening size used is t*=12%, and the equivalent depth of the defect is h*=3%. Computational methods are being used in this research to analyzing flow of the fluid through the NACA 0015 airfoil, both in smooth and defective airfoil, with various Reynolds Number which are 1.6×106, 2×106, and 2.5×106. Standard k-epsilon model is being used in this research as turbulence model. For the smooth airfoil, stall conditions occur at an AoA of 11º, while for the defective airfoil, they occur at an AoA of 9^° for each Re variation. The average decrease in the Cl/Cd ratio from smooth airfoil to defective airfoil at each AoA for all Re variations is 33%. There is an increase in pressure on the upperside leading edge of defective airfoil for all Re values. Based on the velocity streamlines, vortices can be found at the defect cavity, and the vortex at the defective airfoil seems larger than the smooth airfoil.]]>
<![CDATA[Comparative analysis of solar panel output power with variations of Heatsink type cooling systems ]]>
<![CDATA[Dwi Yulia Handayani]]>;
<![CDATA[James Julian]]>;
<![CDATA[Fitri Wahyuni]]>;
<![CDATA[Ridwan Daris Naufal]]>
<![CDATA[ Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 8 No. 2 (2023) ]]>
Publisher : <![CDATA[University of Muhammadiyah Malang ]]>
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DOI: 10.22219/jemmme.v8i2.30152
<![CDATA[The heatsink is installed on the back sheet of the solar panel in the form of a fin so that the air under the solar module helps the heatsink perform cooling. Temperature testing uses a thermocouple temperature sensor at several calibrated points, taking volt and current data using a multimeter. The results of this test obtained a deviation comparison value between solar panels without a heat sink and using a heat sink of ±1%. So, the similarity of deviation values from the research is used as a control variable. From all the data that has been taken, using heat sinks on solar panels can reduce excess heat in the solar panel modules. The heat transfer that occurs in this experiment is by conduction and convection. The heatsink's good performance in releasing heat with high power output can be seen at 12.25 because the resulting thermal efficiency is related to the power released at the same time. The thermal efficiency value is 20.88%, and the power increase is 19.31%.]]>
<![CDATA[THE EFFECT OF THE SPLIT NACA 0015 AIRFOIL ON VARIATIONS IN REYNOLDS NUMBER ]]>
<![CDATA[Satria, Muhammad Fari]]>;
<![CDATA[Julian, James]]>;
<![CDATA[Wahyuni, Fitri]]>;
<![CDATA[Iskandar, Waridho]]>
<![CDATA[ TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Metro ]]>
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DOI: 10.24127/trb.v12i2.2845
<![CDATA[This research will discuss the advantages of a NACA 0015 airfoil with a split configuration under varying Reynolds numbers. Computational Fluid Dynamics (CFD) simulations with a K-epsilon turbulence model were conducted on a two-dimensional split airfoil to achieve this goal. Initially, simulations were carried out for the unsplit airfoil geometry at different Reynolds numbers within an angle of attack (AoA) range of 00 to 250. Subsequently, simulations were performed for the split airfoil geometry at various Reynolds numbers within the same AoA range. The unsplit airfoil experiences stall at AoA greater than 110 degrees, while the split airfoil experiences stall at AoA greater than 130 degrees. Additionally, using a split airfoil enhances Cl, with an average increase of approximately 7-8% across different Reynolds numbers. In addition to the Cl improvement, the split airfoil exhibits lower Cd values than the unsplit airfoil, with an average reduction of about 26-28% across all Reynolds number variations. Overall, using separate airfoils improves the aerodynamic performance of the airfoil, with an average increase in Cl/Cd of approximately 33-37% across all Reynolds number variations. In conclusion, the split airfoil performs better than the unsplit airfoil.]]>
<![CDATA[ANALYSIS OF COGGING TORQUE REDUCTION FROM DESIGN COMPUTATIONAL PERMANENT MAGNET SYNCHRONOUS MOTOR WITH TAGUCHI METHOD ]]>
<![CDATA[Wahyuni, Fitri]]>;
<![CDATA[Julian, James]]>;
<![CDATA[Ferdyanto, Ferdyanto]]>;
<![CDATA[Fauzi, Ade Fikri]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/jrm.v15i1.1492
<![CDATA[Permanent Magnet Synchronous Motor (PMSM) applications include electric vehicles, industrial pumps, wind turbines, aerospace technology, and many others. In this study, cogging torque is the central aspect of the discussion, which is the motor model, the thickness of the permanent magnet rotor, and the air gap in the electric motor influence. The Taguchi method uses parameter levels on the motor, which are divided into 16 types of orthogonal arrays, where the process is carried out twice in iterations. The first stage of simulation testing was to produce the primary model where number 4 (A1B4 series) was obtained as the most optimal motor model with a cogging torque of 1.56 Nm and an air gap flux density of 768 mTesla (mili tesla). Then the second test was to modify several parts of the motor with the following 16 orthogonal array types, which produced number 8 (A2B4 series) with a cogging torque of 1.08 Nm and an air gap flux density of 733 mTesla. One of the parameters apart from the cogging torque must be maintained is the air gap flux density. This variable affects the permeability of the motor so that later it will affect the amount of material used and the production costs of electric motors. The final result is a model that produces the lowest cogging torque while maintaining other parameters on the motor.]]>
<![CDATA[Study of Fluid Flow Characteristics In A 90° Pipe Bend With Varying Guide Vane Length ]]>
<![CDATA[Julian, James]]>;
<![CDATA[Purba, Riki Hendra]]>;
<![CDATA[Sedeq, Khalees]]>;
<![CDATA[Wahyuni, Fitri]]>;
<![CDATA[Junaedi, Thomas]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol. 6 No. 3 (2024): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.6.3.99-108
<![CDATA[The influence of guide vane length and Reynolds number was investigated using computational fluid dynamics methods. By using a structured mesh, it is known that the three mesh variations used have been verified using the Richardson Extrapolation method. The validation process also showed quite good results. From this research, it can be seen from the velocity profile trend, which is close to the experimental results from previous studies. Changing the Reynolds number does not significantly change the velocity profile at the outlet bend. However, it can be seen that changes in the Reynolds number impact the fluid flow pattern produced around the pipe bend. It can be seen clearly, especially when the velocity is negative. Changing the length of the guide vane changes the flow pattern quite significantly. It is known that the shorter the guide vane used, the velocity profile will tend towards the outer core. Furthermore, using a guide vane increases the velocity profile at the position -0.3≤r/R≤ -0.06. Using a guide vane has proven to eliminate negative velocity areas on the inner core side of each variation.]]>
