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All Journal IPTEK Journal of Proceedings Series Rekayasa Mesin Sinergi VANOS Journal of Mechanical Engineering Education Turbo : Jurnal Program Studi Teknik Mesin Journal of Research and Technology MEKANIKA - JURNAL TEKNIK MESIN JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Prosiding Seminar Nasional Sains dan Teknologi Terapan Scientific Journal of Mechanical Engineering Kinematika Mechanical Engineering for Society and Industry Journal of Mechanical Engineering, Science, and Innovation Jurnal Pengabdian Ilung (Inovasi Lahan Basah Unggul) Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Journal of Science and Social Development
Zain Lillahulhaq
Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Adhi Tama Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Analysis of the Effect Variation of Sides Racing Bike Helmets on Flow Characteristics Using CFD Syamsuri, Syamsuri; Lillahulhaq, Zain; Mufarrichi, Muhammad
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 1 (2024): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i1.2699

Abstract

The selection of materials and aerodynamic design forms needs to be considered in designing a comfortable helmet. The emergence of the drag force on the helmet causes a compressive force, which causes the rider discomfort when driving at high speeds. This research was conducted on 4 variations of helmet models consisting of 1 time-trial type helmet as a reference and 3 other helmets which were developed from the basic model. This simulation was conducted in a 2D helmet model at Re 7.14 x 104, 1.00 x 105, and 1.16 x 105. In this study, Turbulence Intensity was varied as 0.1%, 0.2%, and 1%. The results are shown through the drag coefficient's value and visualization of streamlined flow. The results showed that the 2D simulation on the helmet produced a lower error by using Set Up Turbulence Intensity 0.1%. The emergence of the Oscillating Karman vortex in large size indicates the higher the drag force that occurs on the helmet. In this study, helmet type 3, with a trailing edge and has a smooth curve, has the lowest drag force at Re 1.16 x 105 with a drag coefficient value of around 0.38.
Pemanfaatan Tempurung Kelapa sebagai Katalis pada Proses Konversi Minyak Curah Menjadi Biodiesel Yustia Wulandari Mirzayanti; Erlinda Ningsih; Zain Lillahulhaq; Zuhdi Ma’sum; Chevy Renova; Yasin Wijaya
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v6i2.351

Abstract

Vegetable oil is one of the alternative sources of raw material for fuel oil to produce biodiesel. The conversion reaction process requires the help of a catalyst to break down triglycerides into methyl esters. Therefore, this study aims to determine the performance of catalysts made from coconut shells to convert bulk oil into biodiesel. The catalyst performance is focused on biodiesel's yield parameters through the influence factor of catalyst weight, molar ratio, and %FAME. This research was conducted in three stages, namely (1) catalyst preparation, (2) application of catalyst performance through the conversion process of bulk oil into biodiesel, (3) washing of biodiesel. The first stage was catalyst preparation carried out by utilizing a coconut shell, which was first made into charcoal, then activated using H3PO4 then sulfonated with H2SO4. The second stage was the conversion process of bulk oil into biodiesel using coconut shell catalysts through a transesterification process using variations in the catalyst's weight to bulk oil (0.5; 1; 1.5; 2; and 2.5% wt/wt) and bulk oil molar:methanol ratio (1: 3; 1: 6; and 1: 9). The third stage was the process of washing biodiesel using HCl. Based on this study's results, the best catalyst weight was 2% wt/wt with a molar ratio of 1: 9 resulting in the highest yield of 89% and the FAME of 80.36%.
STUDI EKSPERIMEN PENGARUH PENGGUNAAN ENDPLATE BERLUBANG PADA TURBIN SAVONIUS Zain Lillahulhaq; Ilmiatul Masfufiah; Irsyad Amirullah
Scientific Journal of Mechanical Engineering Kinematika Vol 7 No 1 (2022): SJME Kinematika Juni 2022
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v7i1.202

Abstract

The Savonius turbine is widely used because it has a simple design. However, the Savonius turbine has a lower efficiency than the Horizontal Axis Wind Turbine (HAWT). Several studies have been conducted to increase the efficiency of the Savonius turbine. Turbine performance can be improved by reducing the negative vortex by creating a flushing effect. This experiment was conducted to determine the impact of circular cut-off end plates on the Savonius turbine. The research results are shown through turbine performance data on wind turbine angular speed, electric power, static torque, and efficiency. The wind turbines with circular cut-off endplates had higher angular velocities than conventional Savonius turbines. The angular velocity measurement is carried out when the turbine is unloading. Meanwhile, the electric power and static torque of a conventional turbine are more significant than a modified turbine. The measurement of electric power and static torque is carried out when the turbine is in a generator-loaded condition (loading).
Co-Authors Abdul Ghofur Afira Ainur Rosidah Afrizal Amir Afrizal Amir Agung Cahyo Legowo Ahmad Anas Arifin Akhfaruhal Akhfaruhal Ali Khomsah Anindya Rachma Dwicahyani Anindya Rachma Dwicahyani Anton Nugroho Anugrah Fardhan Rasyidi Anugrah Fardhan Rasyidi Ardi Noerpamoengkas Bagus Putra Mahardika Bambang Setyono, Bambang Chevy Renova Chevy Renova Desmas Arifianto Patriawan Dian Yanuarita Purwaningsih Doan Besthian Saragih Donny Albari Donny Albari Dwi Khusna Dwi Kusuma Edi Purnomo Erlinda Ningsih Erlinda Ningsih, Erlinda Fahreza Dwi Sandy Frizka Vietanti Gatot Setyono Gilang Satrio Bawono Hery Irawan, Hery Iftika Philo Wardani Ilmi, Syamsuri Ilmiatul Masfufiah Indra Adi Gunawan Irsyad Amirullah Luthfi Hakim M Arif Maulana, Hasan Syafik Michael Azzura Akbar Miftahul Ulum Moch Syaiful Huda Moch Syaiful Huda Mufarrichi, Muhammad Muhammad Abrory Naili Saidatin Nasyith Hananur Rohiem Novian Patria Uman Putra Rizal Mahmud Rizal Mahmud Roni Akustik Kurniawan Safiullah Safiullah Sasongko, Sukendro Broto Setyowati, Vuri Ayu Suheni Sutardi Sutardi Syamsuri Syamsuri Syamsuri Syamsuri Syamsuri Syamsuri Vietanti, Frizka Vivien Suphandani Djanali Vuri Ayu Setyowati Wardani, Iftika Philo Wawan Aries Widodo Yasin Wijaya Yasin Wijaya Yohanes Charles Narding Yusron, M Yustia Wulandari Mirzayanti Yustia Wulandari Mirzayanti Zuhdi Ma’sum Zuhdi Ma’sum