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All Journal PROSIDING SEMINAR NASIONAL Dental Journal (Majalah Kedokteran Gigi) Journal of Geoscience, Engineering, Environment, and Technology Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi Jurnal Teknologi dan Riset Terapan (JATRA) Edu Sociata : Jurnal Pendidikan Sosiologi Vortex International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Manajemen dan Teknologi Rekayasa Khidmat : Jurnal Pendidikan dan Ilmu Sosial International Journal of Economics, Business and Innovation Research
Agung Prakoso
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Religion Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Journal : Vortex

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EXPERIMENTAL STUDY OF COOLING SPRAY METHOD ONTO INCLINED HEATED SURFACES Wibowo, Teguh; Hermawan, Dedet; Prakoso, Agung
Vortex Vol 3, No 1 (2022)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (905.501 KB) | DOI: 10.28989/vortex.v3i1.1164

Abstract

Single droplet impingement onto inclined heated surface is studied experimentally. Droplet in the form of aquades is dropped from a fixed height 70 mm to the metal surface with 45º impact angle. This experiment uses 3 types of metals; Stainless Steel AISI 304, Aluminum Alloy 2024, and Copper. All material surfaces are mirror polished and assumed to have the same surface treatment condition. Surface temperatures are 110 ºC, 150 ºC and 210 ºC to determine droplet behavior characteristics. The droplet has 3.0 mm diameter and 28.5 Weber Number (low impact category). In order to analyze droplet behavior in slow motion high velocity camera 4000 fps (frames per second) is used with image resolution 1024 x 768. Data obtained then processed using MATLAB image processing technique to analyze sequence of images visually and quantitatively to determine several parameters; spreading ratio, dimensionless height and contact time.The results showed droplets have different behavior characteristics even at the same surface temperature. Droplet contact time on the copper surface is shorter than aluminum and stainless steel. This is because droplets experienced bouncing due to film boiling regime takes place earlier. Maximum spreading ratio of stainless-steel surfaces is higher than copper because changes of boiling regime on stainless steel surfaces are slower and droplet is still experiencing spreading on the surface
Penanganan Vibration Propeller menggunakan Metode Fault Tree Analysis pesawat KT-IB Woong Bee Kurniawan, Riski; Pamungkas, Sunu Aditya; Prakoso, Agung; Lukito, Indro; Budiono, Cyrilus Sukaca; Soemarwoto, Wahyudi
Vortex Vol 5, No 2 (2024)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v5i2.2418

Abstract

Propeller yang diputar oleh engine dapat menghasilkan gaya dorong, karena bentuk blade propeller sendiri yang menyerupai airfoil pada wing pesawat jika dilihat dari penampangnya. Pada pesawat KT-1B Woong Bee, propeller yang digunakan adalah HC-E4N-2/E9512CB-1, jenis adjustable pitch dengan 4 blade. Agar propeller berfungsi optimal, putaran harus stabil untuk memastikan gaya dorong dan kenyamanan penerbangan. Vibration pada propeller sering disebabkan oleh ketidakseimbangan blade, yang bisa terjadi akibat perbedaan berat blade atau perbedaan angle of attack. Analisis kegagalan vibration propeller dilakukan dengan observasi dan data kegagalan dari pesawat KT-1B Woong Bee dalam tiga tahun terakhir (2021-2023). Data tersebut dianalisis menggunakan metode Fault Tree Analysis (FTA) untuk menemukan basic event vibration yang kemudian dianalisa kembali untuk menentukan modus kegagalan yang berupa different weight pada blade yang kemudian dilakukan penanganan berupa balancing propeller, yang mencakup penambahan beban pada blade untuk menyeimbangkan berat blade propeller.
Co-Authors Ahmad Najib Alni, Azzahra Dwi Amrullah, Fauzan Andinusa Rahmandhika Anjani, Wenda Latifah Arif Pambekti Budiono, Cyrilus Sukaca Denny Dermawan Dwideta, Vezi Adina Elita Rafni, Elita Elvaria, Anna Fachry Abda El Rahman Farchan Mauluddin Fery Agusman MM Hadi, Farhan Henny Pratiwi, Henny Hermawan, Dedet Indrayani Kudus, Wahid Abdul Lukito, Indro Maulana Agung Mirza, Akhmad Mizan, Fathkul Okto Dinaryanto Pamungkas, Sunu Aditya Prima, Wahyu Riski Kurniawan Rita Endriani Rizqi ilmal yaqin, Rizqi ilmal Saputra, Rahmad Hidayat Setyo, Bima Candra Gautama Adi Soemarwoto, Wahyudi Sonhaji - Teguh Wibowo Tesniyadi, Dema