cover
Contact Name
Ika Dewi Wijayanti
Contact Email
ika.dewi.wijayanti@its.ac.id
Phone
-
Journal Mail Official
jmes@its.ac.id
Editorial Address
JMES: The International Journal of Mechanical Engineering and Sciences Editorial Office Departemen Teknik Mesin, ITS Kampus ITS Sukolilo Surabaya 60111 Building C, Floor 2 Indonesia
Location
Kota surabaya,
Jawa timur
INDONESIA
JMES: The International Journal of Mechanical Engineering and Sciences
ISSN : -     EISSN : 25807471     DOI : https://dx.doi.org/10.12962/j25807471
JMES publishes high-quality original research articles, review articles, and letters to the editor that advance mechanical engineering and related disciplines. The journal provides an international platform for researchers, academics, and industry practitioners to disseminate scientifically rigorous, innovative, and application-oriented research, bridging fundamental science with real-world engineering solutions. JMES welcomes high-quality original research and review articles covering theoretical, experimental, and numerical aspects in the following areas: Thermal and Fluid Engineering, including heat transfer, fluid flow, and energy conversion. Manufacturing and Mechanical Design, focusing on manufacturing processes, product development, and mechanical systems. Materials and Structural Engineering, covering engineering materials, structural performance, reliability, and failure analysis. Computational Engineering, emphasizing modeling, simulation, optimization, and data-driven engineering methods. Sustainable Energy Systems, addressing renewable energy, energy efficiency, energy storage, and low-carbon engineering technologies.
Articles 2 Documents
Search results for , issue "vol 3 no 1 (2019)" : 2 Documents clear
Study on The Effect of Cold-Rolling and Subsequence Welding on the Corrosion Rate of 304L Niko Arianto; Suwarno Suwarno
JMES: The International Journal of Mechanical Engineering and Sciences Vol 3 No 1 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v3i1.8967

Abstract

Corrosion is an event of material damage due to reacting chemically with the environment. Stainless steel is a widely used steel in the industrial world, for example, the austenitic stainless-steel type 304L. The problem that still arises with 304L stainless steel is corrosion at grain boundaries. The sensitization process occurs when the steel is heated at a temperature of 500 °C – 700 °C resulting in chromium carbide precipitation formation. Sensitization of austenitic stainless steel can occur during the welding process, which can cause damage to the heat-affected zone (HAZ). Cold working on metals is a deformation process that is carried out at temperatures below the recrystallization temperature. This research was conducted to determine the effect of variations in rolling and welding. Rolling was carried out using a cold working process with a variation of the workpiece reduction, namely 20%, 40%, and 60%. Welding was carried out with current variations of 50, 65, and 80 with a welding timeof 5 s and 10 s. The corrosion rate was tested using a potentiostat to obtain current density (Icorr) and potential (Ecorr) data. From the research, it was found the relation between rolling, welding parameters, and the corrosion rate. The corrosion rate is controlled by the carbide precipitation in the HAZ regime.
Numerical Study of Impeller Trimming on a Centrifugal Pump Test Unit R. Aurick Nugraha Prawito; Vivien Suphandani Djanali; Alif Arif Wicaksono
JMES: The International Journal of Mechanical Engineering and Sciences Vol 3 No 1 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v3i1.9365

Abstract

Centrifugal pumps have an essential role in various industries. Impeller trimming is often performed to optimize the pump performance at a particular operating point. Impeller trimming refers to a reduction in the impeller outer diameter and thus causes a change in the velocity triangle on the impeller of a centrifugal pump. Three-dimensional, unsteady simulations were conducted numerically using moving mesh. This centrifugal pump has a backward-curved impeller with six blades, with anouter diameter of 120 mm and an outlet angle of 10°, which will be trimmed to a diameter of 114 mm. Trimming the impeller reduced the outer diameter so that the outlet angle of the relative velocity to the tangential direction, β2, automatically changed according to the blade shape. The simulation was done by varying the pump discharge. The simulation results were compared with the experimental results. The results obtained in this study include quantitative data and qualitative data. Qualitative data was the appearance of velocity profiles, velocity vectors, and pressure contours. Meanwhile, the quantitative data were in the form of suction pressure, discharge pressure, head calculation, and hydraulic power. The comparison of the results of the numerical simulation with the experimental results have the same trend, although the simulation tended to underestimate the head and hydraulic power. A decrease in head and hydraulic power of the pump due to trimming the impeller from the lowest discharge to the highest discharge is as much as 13% to 24%.

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