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All Journal International Journal of Renewable Energy Development Rekayasa Mesin DINAMIKA Jurnal Ilmiah Teknik Mesin Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali Fokus Elektroda: Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Jurnal Pengabdian Masyarakat Ilmu Terapan (JPMIT) Piston: Jurnal Teknologi Jurnal Polimesin
La Ode Ahmad Barata
Jurusan Teknik Mesin, Universitas Halu Oleo
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Rekayasa Mesin

 1 
KARAKTERISTIK PEMANEN DAYA LISTRIK BERBASIS GETARAN STRUKTUR La Ode Ahmad Barata; Samhuddin Samhuddin
Jurnal Rekayasa Mesin Vol. 13 No. 3 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i3.1268

Abstract

Mechanical vibration is a potential source of micro-electrical energy harvesting mechanisms for micro electrical power supply for IoT system networks, wireless and sensors where the power requirements are relatively lower and available independently. In this study, the characteristics of the cylinder vibration response as a trigger for energy harvesting from flow-induced vibrations at various air velocities were investigated experimentally in a wind tunnel test section. Harvesting of micro power from cylinder’s motion by using galfenol (Fe-Ga) material was also investigated simultaneously. The maximum cylinder’s vibration response was obtained by using the plain cylinder model. Cylinder taper variation reduce the maximum vibration response. The position of the major (D) and minor (d) (or inverse position) diameters also affects the vibration response. However, tapering the cylinder reduces the onset vibration with respect to the flow velocity. The frequency of the vortex (Strouhal, St) ranges from 0.25 to 0.12. The minor diameter of the tapered cylinder has the effect on decreasing the vibration response and tends to be stationary. Minor diameter reduction reduces the potential for vibration to the structure. The maximum power generated by the test model is about 8.5 mW with the power RMS value of 2.3 mW and power coefficient about 4%.
ANALISIS KARAKTERISTIK ALIRAN MELALUI PENAMPANG PERSEGI PANJANG MENGGUNAKAN MODEL TURBULEN LARGE EDDY SIMULATION (LES) Barata, La Ode Ahmad; Samhuddin, Samhuddin
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1495

Abstract

Dynamic response, fatigue, and stability issues of a structure are closely related to flow behavior past a bluff body structure. Flow past the free-end rectangular prism is investigated numerically using a Large Eddy Simulation (LES) turbulence model at Re = 22000. The prism model has a constant depth (D) to width (H) ratio D/H = 0.5 for span length variation L (= 10; 7,5; 5,0 and 2,5H). Effects of the free end on the flow characteristics showed that the flow pattern, velocity vector, and fluid forces component are changed. The presence of the free end is closed related to the flow characteristics alteration in the wake, which is presented graphically in this paper. This study suggests the critical aspect ratio of the slender rectangular is 2,5<L/H<5,0 The prism with critical aspect L = 2,5H presented an unusual flow behavior among the test models. The dynamic response of the test model affects the flow pattern in the wake, which is indicated by alteration of the region and intensity of vorticity, velocity vector, hydrodynamic force components, and other local components.
ANALISIS KARAKTERISTIK ALIRAN MELALUI PENAMPANG PERSEGI PANJANG MENGGUNAKAN MODEL TURBULEN LARGE EDDY SIMULATION (LES) Barata, La Ode Ahmad; Samhuddin, Samhuddin
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1495

Abstract

Dynamic response, fatigue, and stability issues of a structure are closely related to flow behavior past a bluff body structure. Flow past the free-end rectangular prism is investigated numerically using a Large Eddy Simulation (LES) turbulence model at Re = 22000. The prism model has a constant depth (D) to width (H) ratio D/H = 0.5 for span length variation L (= 10; 7,5; 5,0 and 2,5H). Effects of the free end on the flow characteristics showed that the flow pattern, velocity vector, and fluid forces component are changed. The presence of the free end is closed related to the flow characteristics alteration in the wake, which is presented graphically in this paper. This study suggests the critical aspect ratio of the slender rectangular is 2,5<L/H<5,0 The prism with critical aspect L = 2,5H presented an unusual flow behavior among the test models. The dynamic response of the test model affects the flow pattern in the wake, which is indicated by alteration of the region and intensity of vorticity, velocity vector, hydrodynamic force components, and other local components.
Co-Authors Abd. Kadir Akbar Naro Parawangsa Akbar Naro Parawangsa Aksar, Prinob Aminur Aminur Aminur Aminur Amrullah Amrullah Ardian Sumantri Arjuna, Muhamad Arnold Oscar F.R. Budiman Budiman Budiman Sudia, Budiman DWI SURYANTO Harjum La Bau Hasanudin, La Idul, Idul Jaka Seru Dwi Saputra Jaka Seru Dwi Saputra Jenny Delly Kadir Kadir Kiwata Takahiro Kiwata, Takahiro La Hasanudin Lolok, Agustinus Lukas Kano Mangalla, Lukas Kano Masharib Al Akhyar Muh Fadhil Safli Muh. Ilcardi Ralda Muhamad Laskar Wahid Muhammad Abdillah Muhammad Alfian Muslimin, Salman Nanang Endriatno Nanang Endriatno Nining Mahmuda Meliana Nurjannah Yusman Nurudin, La Ode Rivaldy Rizki Rustam Efendi Ryan Aspari Salimin Salimin Samhuddin Samhuddin Samhuddin Samhuddin Samhuddin Samhuddin Samhuddin, Samhuddin Sarifudin sarifudin, Sarifudin Septianus T.L. Sigit Santoso Sri Amrin Al Kadirun Sudarsono Sudarsono Sudarsono Sudarsono Suratin, Dedi Mardeni Suriyadi Takahiro Kiwata Tando, Arjal Taufik, Muhamad Rian Toshiyuki Ueno Ungo Ibuhasa Urzunil Kadim Yolli Fernanda Zulkifli Ananda