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All Journal Jurnal Teknologi Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC) ARMATUR : Artikel Teknik Mesin dan Manufaktur Vortex
Buyung Junaidin, Buyung
Institut Teknologi Dirgantara Adisutjipto
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PERANCANGAN PURWARUPA VERTICAL AXIS WIND TUBINE (VAWT) SKALA KECIL junaidin, buyung
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.056 KB)

Abstract

Konsumsi energi yang berasal dari bahan bakar fosil yang semakin tinggi dan ketersediannya di alam yang terbatas sehingga jumlahnya makin lama semakin berkurang, memaksa orang untuk mencari alternatif sumber energi lain. Energi angin menjadi salah satu energi alternatif yang penting dan diperhitungkan sejak adanya krisis energi dan isu lingkungan (polusi udara) akibat penggunaan bahan bakar fosil. Energi angin dimanfaatkan dengan cara mengubah gerakan angin menjadi energi listrik dengan turbin angin (wind turbine). Banyak turbin angin dengan skala besar yang telah dibuat atau dikembangkan di berbagai negara karena terbukti sangat efektif untuk menghasilkan energi listrik. Turbin angin skala kecil juga ikut dibuat dan dikembangkan hingga saat ini karena beberapa kelebihannya jika dibandingkan dengan turbin angin skala besar. Kelebihan itu diantaranya tidak terbatasnya daerah atau lokasi pemasangan turbin angin karena ukurannya yang kecil sehingga dapat ditempatkan di daerah seperti perkotaan. Untuk turbin angin skala kecil, jenis vertical axis wind turbine (vawt) sangatlah cocok digunakan di daerah perkotaan karena karakteristik VAWT yang dapat bergerak tanpa tergantung arah angin, hal ini sesuai dengan karakteristik angin perkotaan. Selain itu, VAWT dapat bergerak dan menghasilkan energi listrik pada kondisi kecepatan angin yang rendah. Penelitian ini fokus pada perancangan VAWT skala kecil yang dapat diaplikasikan pada kecepatan angin rendah dan berubah-ubah arah seperti karakteristik angin di perkotaan Indonesia serta analisis aerodinamika menggunakan metode double-multiple stream-tube (DMS).
NUMERICAL SIMULATIONOF FLEXIBLE WINGOF HALE UAV USING TWO-WAY FLUID STRUCTURE INTERACTION METHOD Junaidin, Buyung
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

This paper describes numerical simulation o f flexible High Altitude Long Endurance Unmanned Aerial Vehicle (HALE UAV)wingusing two-way fluid structure interaction (FSI) method. The HALE wing is designed with high aspect ratio. This configuration intended to reduce the vehicle induced drag and reduces the lift-loss at wingtip which caused by wingtip vortex. But the structure of the wing itself becomes more elastic that be able to give large deformation when the aerodynamic loads applied. This deformation changes the aerodynamic loads distribution on the wing that gives a new deformation to the wing structure and vice versa. This interaction in a couple process called as fluid structure interaction (FSI). ANSYS 15.0 software was used to simulate fluid structure interaction on the wing. The unsteadiness and viscous flows at low speed are evaluated using the solution o f timedependent Reynolds Averaged Navier-Stokes (RANS) with SST k-rn turbulent model. In addition, multiblock structured grids are generated to provide more accurate viscous result and to anticipate negative volume o f the mesh which may occur due to the deformation o f the wing during simulation. Five different o f simulations are performed with variation o f material characteristics including Young’s modulus and Poisson’s ratio.The results are global aerodynamic characteristics at various material characteristics.
AERODYNAMIC CHARACTERISTICS OF AIRFOIL USING PANEL METHOD Junaidin, Buyung
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Potential flow over an airfoil plays an important historical role in the theory of flight. The governing equation for potential flow is Laplace’s equation, a widely studied linear partial differential equation. One of Green’s identities can be used to write a solution to Laplace’s equation as a boundary integral. Numerical models based on this approach are known as panel methods in the aerodynamics community. This paper introduces the availability of a computational tool for constructing numerical modelfor potential flow over an airfoil based on panel methods. Use of the software is illustrated by implementing a specific model using Hess and Smith panel method to compute the flow over a member of the NACA four-digit airfoils.
PERANCANGAN AWAL SCALE MODEL GLIDER STTA-25-02_SAILPLANE Firmansyah, Hendrix Novianto; Junaidin, Buyung; Mauliadi, M. Fatha
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.432 KB)

Abstract

The knowledge and experience in aircraft design, especially for glider or sailplane are very important to have. Today, process of designing glider developed so rapidly, especially in America and Europe, one of the significant achievement is the performance aspect of glider. For example, the German-built Eta has a wingspan 30.78 m, aspect ratio 51 and wing loading 50.97 kg/m2, with glide angle of 0.8 degree and 3 km altitude, the glider able to fly 213 km in horizontal direction. Therefore, as the first step to understand the preliminary design of glider, it is important to start with designing a scale model glider STTA-25-02_Sailplane. The goals of this design are to get geometry and configuration of the glider, to obtained stability of glider and to gain performance data that meet with design requirements and objectives data (DR&O). The conclusions from the preliminary design of scale model glider STTA-25-02_Sailplane are the geometry and configuration are good, for example the achivement in performance, the minimum sink rate 0.52 m/s, the glide ratio more than 20 at a cruising speed over 13 m/s, stall speed 11.45 m/s at angle of attack 0 degree. In addition glider STTA-25-02_Sailplane has static and dynamic stability, the static stability condition is indicated by the value of trim angle is positive 1 degree, curve of Cma and Clfi has negative slope, Cnfi curve has positive slope. The dynamic stability condition is indicated by the eigen value for each mode o f movement are negative except on phugoid and spiral mode, eigen value for short period -5.7681 ± 7.0010, phugoid 0.0403 ± 1.1136, rool damping -32.6243, dutch roll -1.0468 ± 3.4891 and spiral 0.1467. Positive eigen value on phugoid and spiral mode can be solved by adding a control parameter of the controlsurfaces.
MODIFICATION OF ROTOR BLADES SHAPE OF VERTICAL AXIS WIND TUBINE (VAWT) Junaidin, Buyung
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 2 (2018): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2018.779 KB)

Abstract

Vertical Axis Wind Turbine (VAWT) telah dikembangkan berdasarkan kriteria desain dan pertimbangan performa yang diinginkan seperti desain Darrieus dengan bentuk rotor-H, bentuk rotor-V dan bentuk rotor-Troposkein dan desain Gorlov dengan bentuk rotor-helix. Penelitian ini fokus pada modifikasi bentuk bilah rotor VAWT skala kecil yang telah dibuat sebelumnya dari bentuk lurus (straight shaped) menjadi bentuk puntir (helical shaped) untuk meningkatkan performa aerodinamika bilah rotor VAWT. Analisis performa aerodinamika rotor VAWT dilakukan menggunakan pendekatan model double-multiple stream-tube (DMS). Analisis dilakukan dengan variasi sudut puntir  bilah sebesar 45o , 60o, 75o, 90o, 105o dan 120o. Hasil analisis performa rotor menunjukkan bentuk puntir bilah tidak mempengaruhi besar nilai koefisien power turbin angin yang dihasilkan rotor, tetapi torsi yang dihasilkan oleh bilah puntir untuk semua sudut putar memiliki arah yang sama yang dapat mempertahankan putaran turbin yang menghasilkan power yang konstan, berbanding terbalik dengan bentuk bilah lurus. Dari semua sudut puntir yang dianalisis, disimpulkan bahwa sudut puntir yang menghasilkan nilai torsi besar dan power konstan adalah sudut puntir 45o.
Conceptual Design of Electrical Ducted Fan (EDF) Junaidin, Buyung; Cahyono, M. Ardi
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN XXX-XXX-XXXXX-
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.311

Abstract

Electric Ducted Fan (EDF) is an electric propulsion consist of duct, fan and electric motor with main power source is from battery which generates compression air for thrust. EDF is used as an alternative propulsion for high speed UAV especially for target UAV or ?bomb? controlled UAV. It?s design is very simple and no need extra maintenance compared to jet engine. Design process of an EDF is more simple than a jet engine, nevertheless it could obtain enough thrust for high speed flying. The aim of this research is to design an EDF as an alternative propulsion for high speed UAV and performance analyzing of EDF using analitical approach. Design of EDF produce an EDF with inlet and outlet diameter are 70mm and 60mm. Total length of EDF is 116,1mm. Performance analysis of EDF shows that by 700W of motor power could reach 16N of thrust which is accepted performace for 70mm EDF.
CONCEPTUAL DESIGN OF BIRD-LIKE UNMANNED AERIAL VEHICLE FOR BIRD PEST CONTROL Junaidin, Buyung; Hartini, Dwi; Herlambang, Santo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1837.5 KB) | DOI: 10.28989/angkasa.v12i1.559

Abstract

Sparrow (Lonchura sp) bird pest becomes a serious problem for rice-plant farmers when entering harvest period because it could make crop yields decreases or even crop failure. There are many method have been done for bird pest control but almost all of that are not effectives. Bird-like unmanned aerial vehicle is proposed as an alternative solution to control bird pest. The aim of this research is to do conceptual design of unmanned aerial vehicle which look like predator bird for bird pest control in farm area. The predator bird which means is black eagle (Ictinaetus Malaiensis) which is one of natural predators of small birds including sparrow. Conceptual design of bird-like unmanned aerial vehicle follows general design process of aircraft with some simplification. Method of design adopt to Raymer?s method and sketching of black eagle planform especially wings and tail. The design results an unmanned aerial vehicle look like black eagle with cruise speed  is 10m/s and operational altitude 120m above sea level. From aerodynamics analysis shows that bird-like unmanned aerial vehicle which have designed fill lift requirement at angle of attack  3o and longitudinal static stability criteria.    
PERANCANGAN AWAL SCALE MODEL GLIDER STTA-25-02_SAILPLANE Hendrix Novianto Firmansyah; Buyung Junaidin; M. Fatha Mauliadi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.432 KB) | DOI: 10.28989/angkasa.v8i2.122

Abstract

The knowledge and experience in aircraft design, especially for glider or sailplane are very important to have. Today, process of designing glider developed so rapidly, especially in America and Europe, one of the significant achievement is the performance aspect of glider. For example, the German-built Eta has a wingspan 30.78 m, aspect ratio 51 and wing loading 50.97 kg/m2, with glide angle of 0.8 degree and 3 km altitude, the glider able to fly 213 km in horizontal direction. Therefore, as the first step to understand the preliminary design of glider, it is important to start with designing a scale model glider STTA-25-02_Sailplane. The goals of this design are to get geometry and configuration of the glider, to obtained stability of glider and to gain performance data that meet with design requirements and objectives data (DR&O). The conclusions from the preliminary design of scale model glider STTA-25-02_Sailplane are the geometry and configuration are good, for example the achivement in performance, the minimum sink rate 0.52 m/s, the glide ratio more than 20 at a cruising speed over 13 m/s, stall speed 11.45 m/s at angle of attack 0 degree. In addition glider STTA-25-02_Sailplane has static and dynamic stability, the static stability condition is indicated by the value of trim angle is positive 1 degree, curve of Cma and Clfi has negative slope, Cnfi curve has positive slope. The dynamic stability condition is indicated by the eigen value for each mode o f movement are negative except on phugoid and spiral mode, eigen value for short period -5.7681 ± 7.0010, phugoid 0.0403 ± 1.1136, rool damping -32.6243, dutch roll -1.0468 ± 3.4891 and spiral 0.1467. Positive eigen value on phugoid and spiral mode can be solved by adding a control parameter of the controlsurfaces.
PERANCANGAN PURWARUPA VERTICAL AXIS WIND TUBINE (VAWT) SKALA KECIL buyung junaidin
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.056 KB) | DOI: 10.28989/angkasa.v9i2.177

Abstract

Konsumsi energi yang berasal dari bahan bakar fosil yang semakin tinggi dan ketersediannya di alam yang terbatas sehingga jumlahnya makin lama semakin berkurang, memaksa orang untuk mencari alternatif sumber energi lain. Energi angin menjadi salah satu energi alternatif yang penting dan diperhitungkan sejak adanya krisis energi dan isu lingkungan (polusi udara) akibat penggunaan bahan bakar fosil. Energi angin dimanfaatkan dengan cara mengubah gerakan angin menjadi energi listrik dengan turbin angin (wind turbine). Banyak turbin angin dengan skala besar yang telah dibuat atau dikembangkan di berbagai negara karena terbukti sangat efektif untuk menghasilkan energi listrik. Turbin angin skala kecil juga ikut dibuat dan dikembangkan hingga saat ini karena beberapa kelebihannya jika dibandingkan dengan turbin angin skala besar. Kelebihan itu diantaranya tidak terbatasnya daerah atau lokasi pemasangan turbin angin karena ukurannya yang kecil sehingga dapat ditempatkan di daerah seperti perkotaan. Untuk turbin angin skala kecil, jenis vertical axis wind turbine (vawt) sangatlah cocok digunakan di daerah perkotaan karena karakteristik VAWT yang dapat bergerak tanpa tergantung arah angin, hal ini sesuai dengan karakteristik angin perkotaan. Selain itu, VAWT dapat bergerak dan menghasilkan energi listrik pada kondisi kecepatan angin yang rendah. Penelitian ini fokus pada perancangan VAWT skala kecil yang dapat diaplikasikan pada kecepatan angin rendah dan berubah-ubah arah seperti karakteristik angin di perkotaan Indonesia serta analisis aerodinamika menggunakan metode double-multiple stream-tube (DMS).
MODIFICATION OF ROTOR BLADES SHAPE OF VERTICAL AXIS WIND TUBINE (VAWT) Buyung Junaidin
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 2 (2018): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2018.779 KB) | DOI: 10.28989/angkasa.v10i2.363

Abstract

Vertical Axis Wind Turbine (VAWT) telah dikembangkan berdasarkan kriteria desain dan pertimbangan performa yang diinginkan seperti desain Darrieus dengan bentuk rotor-H, bentuk rotor-V dan bentuk rotor-Troposkein dan desain Gorlov dengan bentuk rotor-helix. Penelitian ini fokus pada modifikasi bentuk bilah rotor VAWT skala kecil yang telah dibuat sebelumnya dari bentuk lurus (straight shaped) menjadi bentuk puntir (helical shaped) untuk meningkatkan performa aerodinamika bilah rotor VAWT. Analisis performa aerodinamika rotor VAWT dilakukan menggunakan pendekatan model double-multiple stream-tube (DMS). Analisis dilakukan dengan variasi sudut puntir  bilah sebesar 45o , 60o, 75o, 90o, 105o dan 120o. Hasil analisis performa rotor menunjukkan bentuk puntir bilah tidak mempengaruhi besar nilai koefisien power turbin angin yang dihasilkan rotor, tetapi torsi yang dihasilkan oleh bilah puntir untuk semua sudut putar memiliki arah yang sama yang dapat mempertahankan putaran turbin yang menghasilkan power yang konstan, berbanding terbalik dengan bentuk bilah lurus. Dari semua sudut puntir yang dianalisis, disimpulkan bahwa sudut puntir yang menghasilkan nilai torsi besar dan power konstan adalah sudut puntir 45o.
Co-Authors Abd. Rasyid Syamsuri Anggraeni Kusumaningrum Cahyono, M. Ardi Dasrial Dasrial Dwi Hartini Engelbertus Rande Habibi Habibi Hendrix Novianto Firmansyah Hendrix Novianto Firmansyah, Hendrix Novianto Herlambang, Santo M. Ardi Cahyono M. Fatha Mauliadi M. Fatha Mauliadi, M. Fatha Nurcahyani Dewi Retnowati Santo Herlambang Satya Wicaksono Wisnu Prayogih Yosep Reo