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All Journal Scientific Journal of Mechanical Engineering Kinematika Energy, Materials and Product Design
I Gusti Ngurah Ketut Yudhyadi
Universitas Mataram
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISIS AERODINAMIKA DAN AEROAKUSTIK AIRFOIL WORTMANN FX63-137 Muhammad Zidane Athaya Zulkipli; I Kade Wiratama; I Gusti Ngurah Ketut Yudhyadi
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 1 (2025): SJME Kinematika Juni 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i1.714

Abstract

The aerodynamics and aeroacoustics of airfoils are important considerations in the design of wind turbine blades. Improving wind turbine efficiency by maximizing power requires consideration of minimizing noise levels for environmental health. There aren't many studies that use the Wortmann FX63-137 airfoil for both noise prediction with Large Eddy Simulation (LES) and aerodynamic analysis using the SST k−ω model. This study seeks to examine how variations in the angle of attack impact the aerodynamic performance and noise levels of the airfoil. The ANSYS Fluent with the SST k−ω model was used to simulate the airfoil's aerodynamic performance, and LES was used to analyze the airfoil's aeroacoustic performance as the angle of attack changed from 0° to 12°. The results show that increasing the angle of attack raises the CL to a maximum at 12° but also increases CD, which reduces aerodynamic efficiency. Noise levels increase as the angle of attack increases, with peak noise occurring at the trailing edge. This study provides insights for optimizing the design of more efficient wind turbine airfoils while considering environmental noise levels..
The THE FERFORMANCE ANALYSIS OF ELECTRIC CAR OF THE UNIVERSITY OF MATARAM : THE FERFORMANCE ANALYSIS OF ELECTRIC CAR OF THE UNIVERSITY OF MATARAM I Gusti Ngurah Ketut Yudhyadi; Pandri Pandiatmi; Emmy Dyah S.; Ida Bagus Alit; Sinarep
Energy, Materials and Product Design Vol. 4 No. 1 (2025): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v4i1.6342

Abstract

The university of Mataram car suspension and its control was designed to minimize the vibration produced by unwanted external inputs i.e., changes of road contours that reach the car passengers. This effort will provide the passenger with higher safety and comfort. In this study, a quarter car model with two degree of freedoms (2 DOF) was designed and developed its mathematical model. The effects of the road contour were studied and analyzed in term of overshoot and settling time that affect the main body, suspension as well as the passenger. The MATLAB Simulink model was programmed to mimic the behavior of the suspension and its response to the input which was the road contour (step function). This approach was very helpful to reduce the effort, time and money. The result shows that with implementation of the design parameters chose, the responses of the system (displacement and velocities) were satisfied the criteria of comfortable (there are no overshoot), however, the settling time was seconds that much higher than expected which will disturb the passenger comfort. This point shows that the suspension design needs further improvement with consideration of using active suspension with adequate control system.
Co-Authors Emmy Dyah S. I Kade Wiratama Ida Bagus Alit Muhammad Zidane Athaya Zulkipli Pandri Pandiatmi Sinarep