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All Journal Rotasi Rekayasa Mesin REKAYASA Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Applied Research and Smart Technology (ARSTech) Abdi Masya Prosiding University Research Colloquium
Jamaldi, Agus
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Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Journal : Rotasi

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Kajian Numerik Efektifitas Film Cooling pada Sudu Turbin Gas Jamaldi, Agus; Effendy, Marwan
ROTASI Vol 21, No 1 (2019): VOLUME 21, NOMOR 1, JANUARI 2019
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (546.654 KB) | DOI: 10.14710/rotasi.21.1.10-15

Abstract

Penelitian ini bertujuan untuk mengevaluasi penggunaan model turbulensi Detached Eddy Simulation Spallart-Almaras (DES-SA) pada studi numerik tentang sistem pendinginan trailing edge (TE) pada sudu turbin gas. Sebuah desain TE cutback cooling dengan susunan staggered pin-fin dipilih sebagai spesimen pengujian berbasis simulasi. Tiga parameter penting seperti discharge coefficient (CD), adiabatic film cooling effectiveness (ηaw), dan shedding frequency (fs) menjadi fokus utama dalam penyelidikan kinerja sistem pendinginan TE sudu turbin gas. Penelitian dilakukan pada variasi tiga blowing ratios (M) yaitu 0,5; 0,8; dan 1,1. Hasil riset menunjukkan bahwa nilai CD yang diperoleh dari hasil simulasi memiliki kesesuaian trend jika dibandingkan dengan data peneliti terdahulu, dimana nilai CD sedikit meningkat seiring dengan M yang semakin besar. Penyelidikan terkait ηaw yang terjadi pada permukaan adiabatic wall menunjukkan bahwa nilainya konsisten dengan data penelitian yang terdahulu, baik secara eksperimen maupun simulasi. Frekuensi aliran vorteks (fs) berturut-turut 2043, 2323, dan 1976 Hz untuk masing-masing blowing ratios  0,5; 0,8; dan 1,1.
Numerical Study of Cooling Air Flow Distribution in Car Cabin Jamaldi, Agus
ROTASI Vol 23, No 3 (2021): VOLUME 23, NOMOR 3, JULI 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.3.51-55

Abstract

This numerical study aims to investigate the performance of car air-conditioning (AC) cooling of cabin car. The research was done in the two-step. The first step is to collect data by experiment study. Numerical study of performance car air-conditioning is the second step. Detached Eddy Simulation k-epsilon (DES k-ε) turbulence model was utilized in the study. A cabin car design was used as a specimen study. Two key parameters, i.e. temperature distribution, and air cooling speed, were used to assess the AC cooling performance compared with experimental data. Two types of mesh (mesh A and B) with different smooth was utilized. The results showed that mesh B gave good agreement with experimental data with a discrepancy of 0.14%, and 0.27% with mesh A. Air cooling distribution at three measured positions are 0.47; 0.08; and 0.04 m/s, respectively.
Co-Authors A.N, Sebastian Raul Agung Prasetyo Agung Supriyanto, Agung Alfarizi, Fikri Yudi Ardiyanto, Farit Ardiyanto, Wawan Arif Fathurohman, Arif Atmoko, Nugroho Tri Budi Raharjo, Emanuel Catur Prasojo, Ryan Davantio, Jeremy Adi Deni Andriyansyah Ghoni, Ruzlaini Gilang Ramadhan Hassan, Hassan Khamis Hendriyanto, Deva Hidayah, Fatimah Nur Joharwan, Johanes Wawan Krisitiawan, Samuel Ardhi Marwan Effendy Marwan Effendy Nugroho, Wasis Prihastomo, Arik Purwono, Arif Hidayat Raharjo, Emanuel Budi Rahmadi, Muhammad ramadhan, Ichsan Rifai, Damhuji Saputro, Eko Wahyu Savidaprima, Albert Yunatan Sriyanto Surwono, Edi Susanto, Husein Arif Tamzil, Oliver Kurniaawan Teguh Wahyudi Tilfah, Raffi Abdullah Al-Latif Tri Widodo Besar Riyadi Wicaksono, Muh. Tsaqila Yordan Santoso, Lewi