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All Journal JPAP (Jurnal Penelitian Administrasi Publik) (e-Journal) Prosiding SNITP (Seminar Nasional Inovasi Teknologi Penerbangan) Journal of Research in Social Science and Humanities TEKIBA : Jurnal Teknologi dan Pengabdian Masyarakat Sainstech Nusantara
Wulansari, Ajeng
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Journal : Sainstech Nusantara

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Aerodynamic Performance Optimization on NACA 2412 Airfoil Flap With The Addition of Riblets Faadihillah, Almer; Hariyadi Suranto Putro, Setyo; Wulansari, Ajeng
SAINSTECH NUSANTARA Vol. 2 No. 3 (2025): August 2025
Publisher : Nusantara Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71225/jstn.v2i3.118

Abstract

The development of technology in the world of aerodynamics, one of which is research on airfoils. There have been many various studies that have been used to examine airfoils in various flap configurations according to their use. along with the development of the times, research is increasingly easy to do without taking up a lot of time and spending a lot of money. Aerodynamic characteristics are very important in the field of aerodynamic application science aimed at obtaining the maximum performance of an airfoil shape. Therefore, in this case, research on the aerodynamic characteristics of an airfoil is very necessary to get results in the form of airfoil configuration development with force output results for better performance. The results of this study indicate that there is an increase in the performance of NACA 2412 airfoil with the addition of v-groove riblets compared to without v-groove riblets. The existence of v-groove riblets, can delay the occurrence of separation. The simulation shows that the highest lift coefficient increase occurs at α = 14˚ with an increase of 3% lift coefficient and can reduce drag by 7.3% at α = 2˚ so it can be concluded by adding riblets to the airfoil can improve the performance of the Airfoil
Corrosion Rate and Microstructural Evolution of Aluminum 2024-T3 in Nitric Acid under Various Heat Treatment Conditions Gandhy Priyageng Bhagaskara; Wulansari, Ajeng
SAINSTECH NUSANTARA Vol. 2 No. 4 (2025): November 2025
Publisher : Nusantara Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71225/jstn.v2i4.122

Abstract

Aluminum alloy 2024-T3 is widely applied in aerospace structures due to its high strength-to-weight ratio, yet its corrosion behavior in aggressive acidic environments requires further optimization. This study evaluates the influence of heat treatment duration at 300 °C on the corrosion rate and microstructural evolution of Aluminum 2024-T3 immersed in 68% nitric acid (HNO₃). Specimens were prepared under four conditions: without heat treatment and with heat treatment for 1, 2, and 3 hours followed by water quenching. Corrosion testing was conducted using the ASTM G31-72 immersion method at exposure times of 168, 336, 504, and 672 hours, and corrosion rates were determined using the weight loss method, complemented by optical microstructural observation. The results indicate a progressive increase in corrosion rate with immersion time for all specimens. Untreated samples exhibited the highest corrosion rate, reaching 480.88 mpy at 672 hours, whereas heat-treated specimens demonstrated reduced corrosion rates, with the lowest value of 365.03 mpy observed in the 1-hour treatment condition, corresponding to an overall reduction of up to 11.70%. Microstructural analysis revealed a transition from dominant pitting corrosion in untreated specimens to intergranular corrosion in heat-treated samples. These findings highlight the role of thermal processing in enhancing corrosion resistance and optimizing service performance in acidic environments.
Co-Authors Ahmad Bahrawi, Ahmad Faadihillah, Almer Gandhy Priyageng Bhagaskara Hadi Prayitno Hariyadi Suranto Putro, Setyo Pambudiyanto, Nyaris Permatasari, Nanda Purwayudhaningsari, Ranatika Sakti, Gunawan Suyatmo Wicaksono, Putra Wirawan, Willy Artha Yulyana, Eka Yundari, Yundari