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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) FLYWHEEL : Jurnal Teknik Mesin Untirta REKAYASA Communications in Science and Technology JMM (Jurnal Masyarakat Mandiri) Jurnal Teknik Mesin Indonesia Mekanika: Majalah Ilmiah Mekanika Indonesian Journal of Electrical Engineering and Computer Science SEMAR Journal of Electrical, Electronic, Information, and Communication Technology (JEEICT) Automotive Experiences Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Research in Education, Technology, and Multiculture

Danardono Dwi Prija Tjahjana, Dominicus

Universitas Sebelas Maret

Author-ID : 1180946

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

Published : 21 Documents Claim Missing Document

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Design of eddy current brake for electric motorcycle braking system Mufti Reza Aulia Putra; Muhammad Nizam; Dominicus Danardono Dwi Prija Tjahjana
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 1: March 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v12.i1.pp41-50

Braking systems in motor vehicles generally use a braking system that utilizes friction. The braking performance will decrease caused by using friction rapidly. To overcome this, as an alternative, an electromagnetic braking system can be used by utilizing eddy currents, such as eddy current brakes (ECB). Eddy currents are generated when the rotor pass the magnetic field of the electromagnet. The research aim is to design an ECB system. The performance of the disk design will be determined in this study. The study is about the tendency of the ECB properties. The finite element (FEM) method is used by modeling ECB performance. The experimental results were used to validate the result. The test showed the results of braking using aluminum disk showed the best performance in 12.03 Nm. From these results, the combination of the disks is needed by an appropriate disk design.

Studi visualisasi pola aliran dua fase air-udara pada vertical upward circular mini-channel Zulfikar Mahmud; Budi Santoso; Dominicus Danardono
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.99

Two phases flow was important phenomenon in the industrial or engineering factories. Especially, the small or mini-channel was applied in the heat exchanger devices such as compact head exchanger and refrigeration evaporator/condenser. The circular transparent mini-channel with 2,5 mm and 5 mm inner diameters were used in this experiment. The flow pattern was identified. Bubble, slug, churn and annular were formed in vertical upward air-water flow. Bubbles flow pattern had elongated air-phase form with no aeration at the end air-phase. The flow pattern was plotted and analysed by flow pattern map in previous research. Actually, the new flow pattern map was reformed for 2,5 and 5 mm inner diameter pipe because of flow pattern map differences with the reference research. Both flow pattern maps had similarity form about mini-channel flow patern map.

Studi simulasi penggunaan airfoil naca 6412 sebagai sudu pada turbin angin crossflow melalui pemodelan CFD 2 dimensi Muhammad Ivan Fadhil Hendrawan; Dominicus Danardono; Syamsul Hadi
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

AbstrakSimulasi ini bertujuan untuk mengetahui pengaruh sudut sudu dan jumlah sudu turbin angin sumbu vertikal cross flow runner terhadap peningkatan kinerja turbin angin. Turbin memiliki jumlah sudau 20, 22, dan 24. Simulasi dilakukan dalam analisis 2D menggunakan ANSYS-Fluent. Tip Speed Rasio bervariasi pada kisaran 0,1-0,5 dengan kecepatan konstan inlet 2 m/s. Efek dari jumlah sudu terhadap torsi dan koefisien daya dianalisis dan dibandingkan. Telah dihasilkan bahwa koefisien daya terbaik adalah 0,5 pada Tip Speed Rasio 0,3.

Simulasi drag-type turbine ditinjau dari pengaruh variasi sudut kelengkungan sudu untuk diaplikasikan dalam pipa air Muh. Alwan Rosyidi; Syamsul Hadi; Dominicus Danar Dono Dwi Prija Tjahyana
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

The high rainfall and the high-rise building in urban areas are important potential factor in developing the alternative energy. A concept of Horizontal Axis Water Turbine is proposed as a media to generate the electrical energy with low head condition. This research focuses on the effect of various blade curvature angle on Drag-type Turbine with simulation method. The purpose of this research is to find the maximum performance from a various blade curvature angle of 100Â°, 110Â°, 120Â°, 130Â°, 140Â°, and 150Â°. The result is the maximum performance obtain at blade curvature angle 150Â° with torque value 16,8 Joule.

Redesign runner turbin pembangkit listrik tenaga pico hydro dengan metode reverse engineering melalui pendekatan teoritis Abdillah Zuhud; Sukmaji Indro Cahyono; Dominikus Danardono Dwi Prija Tjahyana
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Remote area is a geographically isolated area which has a very low accessibility. Most of its area has a low level both population and electrification due to its accessibility is so far from National power grid. The electrical problem in remote area can be solved by building a Pico hydropower. One of the important components of Pico hydro is a runner turbine. Based on theoretical design process that refers to the fixed variable flow rate 25 l/s, head 2 m and number of turbine rotation 1500 rpm then to be obtained outer diameter runner turbine propeller is 0,103 m, hub diameter is 0,515m, number of blade is 4 with flat blade profile, hydraulic efficiency is 76% and it is targeted to raise 490 Watt electrical power.

Simulasi distribusi temperatur pada friction stir welding dengan tool pin silinder Gesa Sukmawan; Dominicus Danardono; Bambang Kusharjanta
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

In friction stir welding, it is very important to understand temperature distribution. A three dimensional model temperature distribution during friction stir weldingof the nylon 6 using cylindrical and tapered pin has been simulated using finite element method. A steady state finite Element analysis are performed to obtain the temperature distribution in the welded nylon 6 plate during the welding operation. Heat source from the tool shoulder and the tool pin are set up 80% of the melting point nylon 6. The model has been implemented and solved using ANSYS CFX software. The result showed that peak temperature are higher on the advancing side than the retreating side at the beginning and middle position of friction stir welding process using cylindrical and tapered pin. While the final position of the friction stir welding process with cylindrical and tapered pin, the peak temperature at the retreating side was higher than the advancing side. For overall position of the friction stir welding process with cylindrical and tapered pin, temperature distribution behind the pin was higher than the front pin.

PENGARUH SUDUT PUNTIR SUDU PADA SAVONIUS HORIZONTAL AXIS WATER TURBINE SEMICIRCULAR BLADE APLIKASI ALIRAN DALAM PIPA Syamsul Hadi; Muhammad Sidik Teja Purnama; Dominicus Danardono Dwi Prija Tjahjana
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume II Nomor 2, November 2016
Publisher : Universitas Sultan Ageng Tirtayasa

Turbin Savonius merupakan salah satu jenis turbin yang unggul dalam hal karakteristik awal (starting characteristic), mampu beroperasi pada kecepatan aliran yang relatif rendah, serta desain yang sederhana dan murah. Faktor inilah yang membuat turbin Savonius sesuai diaplikasikan untuk sistem pembangkit Piko Hidro, dimana daya keluaran yang dihasilkan sangat kecil yakni kurang dari 5 KW. Penelitian ini bertujuan untuk mengetahui turbin Savonius dengan sudut puntir ( ) yang paling optimal dan membandingkannya dengan sudu konvensional atau tanpa puntiran ( ). Penelitian dilakukan menggunakan metode computational fluid domain (CFD) dengan program SolidWorks 2011 untuk mengetahui sudut puntir yang paling optimal. Variasi sudut puntir yang disimulasikan adalah dan . Hasil simulasi menunjukkan sudut puntir mempunyai nilai torsi paling tinggi. Dari hasil simulasi dapat disimpulkan bahwa sudu dengan puntiran (twisted blades) mempunyai nilai torsi yang lebih tinggi dibandingkan dengan sudu konvensional atau tanpa puntiran ( .

Aerodynamic Characteristics of Ahmed Body with Inverted Airfoil Eppler 423 and Gurney Flap on Fastback Car Zainal Arifin; Suyitno Suyitno; Dominicus Danardono Dwi Prija Tjahjana; Wibawa Endra Juwana; Rendy Adhi Rachmanto; Chico Hermanu Brillianto; Ubaidillah Ubaidillah; Singgih Dwi Prasetyo; Arinal Falah Muhammad; Mohd Afzanizam Mohd Rosli
Automotive Experiences Vol. 5 No. 3 (2022)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.7067

The installation of aerodynamic devices, such as rear wings with the application of a Gurney flap, is very important to improve the performance of vehicles and can generate downforce and reduce slip when a car turns and brakes. The goal of this study was to determine the aerodynamic characteristics of the addition of a rear wing using an Eppler 423 airfoil, which was applied with a Gurney flap featuring variations in the angle of attack and the height of the Gurney flap. The rear wing was mounted on the Ahmed body with a rear slant angle of 15Â°, which is similar to the configuration on a fastback type car. This research was conducted by 3D modeling through computational fluid dynamics (CFD) simulation using ANSYS Student R18.2 by using ahmed body design. There are three variations in the angle of attack for the rear wing (0Â°, 7.5Â°, and 15Â°), as well as five variations in Gurney flap height of 0%, 0.5%, 1%, 1.5%, and 2% for the chord-line length. In this study, the best variation was found at an angle of attack of 15â° with a height of 2% C. From this configuration improved CL/CD ratio by 25.36% when compared to the results without a Gurney flap.

Design and simulation of a combined serpentine t-shape magnetorheological brake Faishal Harish Hidayatullah; Ubaidillah Ubaidillah; Endra Dwi Purnomo; Dominicus Danardono Dwi Prija Tjahjana; Ilham Bagus Wiranto
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 3: March 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v13.i3.pp1221-1227

A magnetorheological brake (MRB) is a device to dissipate rotational energy using magnetorheological fluids (MRF). MRB can change its braking torque quickly in response to external magnetic field strength. The brake is rotational, utilizing the MRF in shear mode. In this study, the geometrical design of the MRB, magnetic circuit and MRF flow path is addressed. Mathematical models are presented that describe the braking torque of the MRB. A novel prototype is introduced combining T-shape rotor model with serpentine flux magnetic circuit configuration. The rotor member is selected to direct the flux concentration at that location. Serpentine flux configuration is selected to achieve higher torque without increasing the size of MRB by activated more surface area of MRF with the magnetic flux. The finite element method is used to evaluate the magnetic flux density in MRB using FEMM 4.2. FEMM results showed that this novel design could provide sufficient magnetic flux along MRF flow path. Finally, the influence of input current to the MRB on braking torque is investigated. It is found that the braking torque in MRB increases with the increase of the input current. The prototype is formulated as foot-drop prevention orthotic. The MRB would be further integrated into ankle-foot orthoses for post-stroke patients. The design is formulated as a preliminary geometrical design, aiming to obtain the minimum required braking torque.

Axial Unipolar Eddy Current Brake Performance Characteristics Against Heat Increase in Rotor Mufti Reza Aulia Putra; Dominicus Danardono Dwi Prija Tjahjana; Muhammad Nizam; Zainal Arifin; Bhre Wangsa Lenggana; Inayati Inayati
Automotive Experiences Vol. 6 No. 1 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.7431

The development of transportation technology in the automotive sector such as electric vehicles is increasingly advanced. One technology that is needed quite a lot is the development of supporting technology for electric vehicle braking. The use of regenerative braking on light electric vehicles such as 2-wheeled vehicles is not efficient because of its low weight. The use of Eddy Current Brake (ECB) can be a solution for braking support needs. This is because the ECB is a braking system that has the advantage of a lightweight design but still relies on the frictionless principle. However, in addition to its advantages, the eddy current brake is still in the early stages of its research with efficiency that still needs to be developed. In the discussion of the ECB, heat generation is one of the interesting topics to be discussed. Specifically, the study of the characteristics of the unipolar ECB axial performance on heat generation events has not yet been discussed. So this article aims to discuss these events with a simulation process and simple mathematical calculations. Design optimization is done to get the best value. As a result, the use of eddy current brakes with conductor disks using slots, can improve the performance of the ECB on the torque side and cooling side. Thus, this article is a good contribution to the sustainability of ECB research in both the general and automotive fields.

Co-Authors Abdillah Zuhud Achmad Gustiantono Aditya Rio Prabowo Ahmad Ilham Ramadhani Andriyanto, Solikin Arinal Falah Muhammad Arjuna AJi Bambang Kusharjanta Bhre Wangsa Lenggana Budi Kristiawan Budi Santoso Budi Santoso Budiana, Eko Prasetya Chico Hermanu B.A. Eko Prasetya Budiana Endra Dwi Purnomo Faishal Harish Hidayatullah Gesa Sukmawan Haji, Mohammed M. Harwijayanti, Widyanita Hasnul Khuluqi Hermes Carvalho Ihsan Pratama Rushadiawan Ilham Bagus Wiranto Inayati Inayati Iwan Istanto Julian Fikri Arifwardana Mahfud Alfajar Mohammad Fahmi Luthfi Mohd Afzanizam Mohd Rosli Mohd Afzanizam Mohd Rosli Mufti Reza Aulia Putra Muh. Alwan Rosyidi Muhammad Aziz Muhammad Ivan Fadhil Hendrawan Muhammad Iyas Abdul Alim Muhammad Nizam Muhammad Nurfajriansyah Muslich Muhammad Sidik Teja Purnama Naufal Ikhsan Alfajri Ngafwan Ngafwan Rachmanto, Rendy Adhi Rahmad Rizki Nur Arifin Rahman Wijaya Rendy Adhi Rachmanto Risdiyanto, Gunawan Ristiyanto Adiputra Rumi Iqbal Doewes, Rumi Iqbal Satria Auliansyah Septiyanto, Muhamad Dwi Seung Jun Baek Shame, Buruhan Haji Singgih Dwi Prasetyo Sukmaji Indro Cahyono Suyitno - Suyitno Suyitno Suyitno Suyitno Suyitno Suyitno Suyitno Suyitno Svitlana Onyshchenko Syamsul Hadi Syamsul Hadi Syamsul Hadi Syamsul Hadi Syamsul Hadi Trismawati Trismawati Ubaidillah Ubaidillah Wibawa Endra Juwana, Wibawa Endra Yudi Kurniawan Yudin Joko Prasojo Zainal Arifin Zainal Arifin Zainal Arifin Zulfikar Mahmud

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