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JMES The International Journal of Mechanical Engineering and Sciences Editorial Office Jurusan Teknik Mesin, ITS Kampus ITS Sukolilo Surabaya 60111 Building C, Floor 2 Indonesia
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JMES The International Journal of Mechanical Engineering and Sciences
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : -     EISSN : 25807471     DOI : https://dx.doi.org/10.12962/j25807471
Core Subject : Science, Engineering,
Energy Materials Science & Nanotechnology Mechanical Engineering
Topics covered by JMES include most topics related to mechanical sciences including energy conversion (wind, turbine, and power plant), mechanical structure and design (solid mechanics, machine design), manufacturing (welding, industrial robotics, metal forming), advanced materials (composites, nanotube, metal foam, ceramics, polymer), metallurgy (corrosion, non-destructive testing, heat treatment, metal casting), heat transfer, fluid mechanics, thermodynamics, mechatronics and controls, advanced energy storage and devices (fuel cell, electric vehicle, battery), numerical modelling (FEM, BEM).
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol 1, No 2 (2017)" : 5 Documents clear
Modeling And Analysis Mechanisms of Electrical Energy Generated By Power Sea Wave Type of Piezoelectric Rowboat Wiwiek Hendrowati; Moch Solichin; Harus Laksana Guntur
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.2620

Abstract

The availability of electricity in the middle of the sea is important for lighting the fishing boat. Therefore, it was designed on a rowboat mechanism associated with piezoelectric energy as the converter. This study simulates the movement of ocean waves with the frequency and amplitude variations that will produce different force. The force of moving components in the mechanism which further encourages piezoelectric cantilever. Deflection caused by the piezoelectric cantilever will produce electrical energy. The greater of the wave frequency, the greater displacement and velocity of  thrustmass, so that electric power generated also increases. When the greater the number of Piezoelectric used, the electrical energy produced is getting smaller. This is due to the increasing number of hard piezoelectric added to be deflected. In this study, the maximum electrical energy produces the highest frequency, high amplitude and the number of piezoelectric slightly.
Dynamic Analysis of Narrow Tilting Three Wheeled Vehicle (NTTWV) with LQG Control Muhammad Fadlil Adhim; Unggul Wasiwitono
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.3329

Abstract

The need for compact vehicles will increase in urban areas in the future. This paper propose solution by designing a vehicle that can combine advantage of car such as comfort and safety and the advantage of motorcycle such as efficiency and lightweight. The proposed vehicle has 3 wheels, 2 front wheels as steering wheels and the rear wheel as traction wheel. Active tilting system is used to give desired roll angel  that can resist the centrifugal force to maintain the vehicle stability. The goals of this research are to design dynamic model and control of NTTWV and its control system. The simulation result showed that the NTTWV rolls only 60% of ideal motorcycle rolling angle at same velocity and turning radius. The improvement of critical speed compared to non-tilting three-wheeled vehicle at steer angle = 5 deg and  10 deg are 193% and 171%.
Numerical Study of Temperature and Air Velocity Distribution In Oil Filling Factory Hernawan Novianto; Prabowo Prabowo
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.2796

Abstract

This paper describes the use of CFD modeling to analyze the thermal comfort in the oil filling factory which has an area of 3000 m2.the need for this analysis comes from an uncomfortable condition that is felt by the workers of the factory. A 3D simulation using FLUENT software 6.3.26 conducted to analyze the temperature and velocity distribution in the plant room. The water is assumed as an incompressible ideal gas, steady flow, turbulence models used k-ε standard, the SIMPLE algorithm and second order upwind discretisation. Analysis was conducted on existing models and propose models, whereby on a model propose, the diffuser is installed above the workers with a height of 4,2 m above the floor, the velocity of supply air diffuser is varied from 1,5 m/s, 2 m/s, and 2,5 m/s. The simulation results show that the temperature distribution in the existing conditions in the range of about 34-36 ° C, this value exceeds the thermal comfort standards specified by ASHRAE. The simulation results show that the proposed model better temperature distribution, where the temperature is generated in the range of ASHRAE thermal comfort criteria, ranging from 24-26 °C, and the supply air velocity at the diffuser inlet of 1,5 m/s recommended for use in AHU system. For the 20 units of the diffuser with inlet velocity of 1,5 m / s, the mass flow rate that should be handled by a cooling device is 9 kg/s and require a cooling capacity of 0,128 MW. This is 58% more efficient than cooling the entire room factory.
Study of Flow Characteristics in a Closed-Loop Low-Speed Wind Tunnel Ahmad Anis; Sutardi Sutardi
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.3900

Abstract

Wind tunnel is an element or experimental device that plays an important role in the development of aerodynamics. In general, there are two types of wind tunnels: open-loop wind tunnels and closed-loop wind tunnels. Furthermore, based on the flow velocity in the wind tunnel, the wind tunnel can also be categorized into several types: low-speed wind tunnel and high-speed wind tunnel, including sub-sonic and supersonic wind tunnels. In this study it is used a low-speed closed-loop wind tunnel type. The maximum atainable velocity of airflow in the wind tunnel is about 46 m/s with turbulence intensity (TI) as low as 0.41 percent. The flow parameters that being evaluated in this study include the velocity profiles and intensity of turbulence (TI) in some parts or sections of the wind tunnel. Pressure measurements in the wind tunnel are performed using a Pitot tube connected to a calibrated pressure transducer. The measured values of pressures are then converted into the fluid velocities and turbulence intensities. The results show that the flow quality in the main test section of the wind tunnel is good enough. The intensity of the flow turbulence on the inlet side of the test section is about 0.41 percent at the centerline velocity of approximately 40 m/s. In some parts of the wind tunnel, turbulence intensity is still relatively high, as in the small elbow outlet where TI is higher than 18 percent.
Numerical Study Effect of Fluidizing Air to Erosion Pattern in Circulating Fluidized Bed Boiler Bambang Sudarmanta; Rizki Mohammad Wijayanto; Giri Nugroho; Achmad Syaifudin; Atok Setiyawan; Julendra B. Ariateja
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.3901

Abstract

Bed material particles in a Circulating Fluidized Bed (CFB) boiler which entrained in the flue gas may cause material degradation due to abrrasive and high velocity impact of particles to wall surface. In this study, Computational Fluid Dynamic (CFD) commercial software with Eulerian multiphase is used to study the erosion pattern in several different fluidizing air velocity. The result obtained from simulation in terms of particles volume fraction and particles velocity in selected area was utilised to predict the erosion rate in several different fluidizing air velocity to achieve the optimal value of fluidizing air velocity. The results obtained in this study are helpful to understand how erosion pattern in CFB boiler, how effect fluidizing air velocity to erosion rate, and also helped to know the potential areas occur erosion so helped to choose suitable material in different region.

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