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All Journal Jurnal Teknik Mesin Indonesia

Wibawa Endra Juwana

Staff Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret

Author-ID : 2658358

Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Articles

Rancang bangun sistem rem anti-lock brake system (abs) dengan penambahan komponen vibrator solenoid zakaria .; Wibowo .; Wibawa Endra Juwana
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

This study aims to analyze the vibration of the braking system equipped by solenoid vibrator component arranged with a control system to produce an ABS effect. Data collection is done by using slam stick. The results showed that the frequency domain signal with the addition of the solenoid vibrator component had peaks at 10 Hz frequency, while the frequency domain signal during braking without the addition of the solenoid vibrator component there were no peaks at 10 Hz frequency. From the data, the ABS braking system works in accordance with the ABS braking system that provides 10 Hz signal.

Pengaruh laju aliran coolant campuran air dengan ethylene glycol terhadap laju perpindahan panas dan penurunan tekanan radiator otomotif Bernadus Nanang Dwi Nuryanto; Tri Istanto; Wibawa Endra Juwana
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

This experimental study was conducted to examine the heat transfer rate and pressure drop on corrugated louver fin with triangular channel radiator. Radiator tube and fin were made of aluminium. Cold fluid flows verticaly from top side to bottom while air flows horizontaly (crossflow heat exchanger). Water and 20% Ethylene glycol were used as hot fluid (coolant) and maintained at constant temperature of 80 oC and varied at flow rate of 25 lpm, 30 lpm, 35 lpm, dan 40 lpm. Where as air was used as cold fluid having its velocity varied at 1.5 m/s, 2 m/s, 2,5 m/s and 3 m/s. And air intake temperature was maintained around 30 oC. The result shows the higher water flow rate in the radiator tube, resulting in higher value of heat transfer rate, and coolant pressure drop. Ethylene glycol mixing composition into the coolant, affects on decreasing the heat transfer rate. The highest heat transfer rate enhancement was obtained at water coolant usage. Ethylene glycol mixing affects the increasing coolant-side pressure drop.

Karakteristik aliran dua fase pada saluran ekspansi tiba-tiba Latif Ngudi Wibawanto; Budi Santoso; Wibawa Endra Juwana
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

This research was conducted to find out the flow characteristic of two phases through the channel with sudden expansion in the form of change of flow pattern and pressure recovery. The test was carried out with variation of superficial velocity of water 0.2-1.3 m / s and superficial air velocity of 0.2-1.9 m / s resulting in pattern of three flow patterns ie bubble, plug, and slug. The expansion channel resulted in some changes to the flow pattern that originally plugs in the upstream channel into bubble in the downstream channel and the slug becomes plug. Pressure recovery experimental results compared with the homogeneous model flow equation and Wadle correlation, both correlations have predictions with standard deviation values of 0.32 and 0.43.

Co-Authors Bernadus Nanang Dwi Nuryanto Budi Santoso Latif Ngudi Wibawanto Tri Istanto Wibowo . zakaria .

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