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All Journal Applied Research and Smart Technology (ARSTech) Journal of Mechanical Engineering, Science, and Innovation
Hassan, Hassan Khamis
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Automotive Engineering Computer Science & IT Control & Systems Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Performance prediction of trailing-edge cooling system of gas turbine blade using detached eddy simulation Jamaldi, Agus; Hassan, Hassan Khamis
Applied Research and Smart Technology (ARSTech) Vol. 1 No. 1 (2020): Applied Research and Smart Technology (ARSTech)
Publisher : Department of Mechanical Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/arstech.v1i1.15

Abstract

This study aims to evaluate the performance of the trailing-edge (TE) cooling system in a gas turbine blade. Eddy Simulation (DES), based on the turbulence model of Spallart-Almaras (SA), was used to simulate the TE cooling system. A TE configuration with a five-row staggered pin-fin arrangement was employed as a computational domain. Three parameters, i.e., the coefficient of heat transfer on the pin-fins surface (hpin), the coefficient of discharge (CD), and the effectiveness of adiabatic film cooling were used to assess the performances. The findings denoted that the heat transfer fluctuations occurred on the surface of the pin-fins in each row. The discharge coefficient increased with the rising of the blowing ratio. The trend predicted data of effectiveness were in good agreement with realistic discrepancies compared to other researches, mainly for higher blowing ratio. The average effectiveness along the cut-off region was to be sensitive to the changes of the blowing ratio, which was attributed to the structures of turbulent flow along the mixing region.
Performance prediction of trailing-edge cooling system of gas turbine blade using detached eddy simulation Jamaldi, Agus; Hassan, Hassan Khamis
Applied Research and Smart Technology (ARSTech) Vol. 1 No. 1 (2020): Applied Research and Smart Technology
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/arstech.v1i1.15

Abstract

This study evaluates the performance of the trailing-edge (TE) cooling system in a gas turbine blade. Eddy Simulation (DES), based on the turbulence model of Spallart-Almaras (SA), was used to simulate the TE cooling system. A TE configuration with a five-row staggered pin-fin arrangement was employed as a computational domain. Three parameters, i.e., the coefficient of heat transfer on the pin-fins surface (hpin), the coefficient of discharge (CD), and the effectiveness of adiabatic film cooling were used to assess the performances. The findings denoted that the heat transfer fluctuations occurred on the surface of the pin-fins in each row. The discharge coefficient increased with the rising of the blowing ratio. The trend predicted data of adiabatic film cooling effectiveness were in good agreement with realistic discrepancies compared to other researches, mainly for higher blowing ratio. The average effectiveness along the cut-off region was to be sensitive to the blowing ratio changes, which was attributed to the structures of turbulent flow along the mixing region.
Influence of Electroplating Time on the Hardness Properties of Nickel-Coated Aluminum Margono, Margono; Prasetyo, Cavin Dwi; Chamim, Moch; Andriyansyah, Deni; Santoso, Bondan Wiratmoko Budi; Putra, Deslana Avinda Krisna; Surono, Arif; Hassan, Hassan Khamis
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)(On Progress)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8767

Abstract

This study investigates the effect of electroplating duration on the hardness and coating thickness of nickel layers deposited on aluminum substrates. Nickel electroplating was performed with immersion times of 17, 34, 51, and 68 min to evaluate the correlation between deposition time, microstructural development, and mechanical enhancement. Microstructural analysis revealed a progressive increase in coating thickness from 3 μm, 7 μm, 11 μm, to a maximum of 44 μm as plating duration increased. Correspondingly, surface hardness exhibited a substantial rise, with untreated aluminum showing 69.44 HV, while electroplated specimens achieved 118.32 HV, 191.32 HV, 258.40 HV, and 418.62 HV, respectively. This increase of up to 502% demonstrates that longer electroplating durations produce denser and finer nickel microstructures, contributing significantly to surface strengthening. The findings confirm that nickel electroplating is an effective method for enhancing the mechanical performance and surface quality of aluminum, with deposition time serving as a critical parameter in optimizing coating characteristics.
Co-Authors Bondan Wiratmoko Budi Santoso Chamim, Moch. Deni Andriyansyah Jamaldi, Agus Margono Margono Prasetyo, Cavin Dwi Putra, Deslana Avinda Krisna Surono, Arif