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All Journal Mekanika: Majalah Ilmiah Mekanika Otopro V-MAC (Virtual of Mechanical Engineering Article)
Bayu Pranoto
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Model Sudu Overlap dan Helix pada Proses Inisiasi Putaran Turbin Savonius Kris Witono; Moh. Nasir; Elka Faizal; Hangga Wicaksono; Bayu Pranoto
Otopro Vol 15 No 1 Nov 2019
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v15n1.p27-31

Abstract

This research proposes a new model of overlap and helix blade shape. The overlap shape of the blades gives room to the air flow shortly after pounding the blades. Air flow direction is strived to be able to push the next blade so that the process of the turbine blade rotation becomes more effective. While the helix model is expected to produce a more efficient turbine rotation due to its multilevel shape. The wind speeds tested were 2 m / s, 4 m / s, and 6 m / s. Turbine speed rotation data retrieval is carried out at each additional time. The overlap blade has a greater angular velocity value of 9.4 rad / s at 2 m / s wind speed, 21.9 rad / s at 4 m / s wind speed, and 29.8 rad / s at 6 m / s wind speed.Turbines with multilevel helix blades have a higher level of stability compared to overlap blades. This is because there are two levels of turbine blades which have an angle difference of 600 which can receive more stable wind collisions. However, due to the smaller cross-sectional area of the helix blade turbine (ie 50% of the overlap blade) the effective impact area on the blade is also getting smaller. So that the energy that can be converted is also relatively smaller than the overlapping blade.
Pressure Drop and Void Fraction of Two-Phase Flow (Air-Water) in Grooved Vertical Pipes Supa Kusuma Aji; Nicky Suwandhy A. S; Chandra Gunawan; Bayu Pranoto; Hangga Wicaksono
Mekanika: Majalah Ilmiah Mekanika Vol 22, No 2 (2023): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v22i2.76968

Abstract

Two-phase flows consisting of liquids and gases are often found in everyday life and are used on an industrial scale. In an industrial environment, this flow has many weaknesses, including pressure drop and void fraction. One strategy to reduce losses that arise is to use passive methods. The passive method used is to utilize the shape of the grooves in the channel. In this study, the flow is used to determine its effect on the pressure drop and void fraction that appears in two-phase flow. The experimental method was used for this study. The test pipe is equipped with 16 grooves, while the smooth pipe (without grooves) is used as a comparison. The test pipe is made of acrylic material. The water fluid is circulated using a centrifugal water pump with a superficial speed of 0.33-0.42 m/s. Air fluid is supplied using a compressor with superficial speeds of 0.049, 0.066, and 0.082 m/s. Measurement of pressure drop was carried out using a pressure transmitter with an Arduino data logger. The void fraction is calculated by determining the ratio of the volume fraction of water and air in the test tube. The results of the study revealed that the use of 16 grooves in the pipe can reduce the pressure drop and cavity fraction that appears when compared to smooth pipes.
Analisis Pengaruh Penambahan Stiffener terhadap Nilai Tegangan dan Defleksi pada Rangka Sepeda Motor Listrik dengan Metode Elemen Hingga Rilis Eka Perkasa; Utsman Syah Amrullah; Bayu Pranoto; Chandra Gunawan
Virtual of Mechanical Engineering Article Vol 8 No 1 (2023): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v8i1.2729

Abstract

Saat ini, sepeda motor listrik telah banyak dijadikan sebagai pilihan moda transportasi alternatif karena sepeda motor listrik memiliki beberapa kelebihan, salah satunya menghasilkan tingkat polusi yang rendah. Salah satu bagian utama dari sepeda motor listrik adalah rangka, yang berfungsi sebagai penyangga beban utama dari sepeda motor listrik dan dudukan dari berbagai komponen lain. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan komponen stiffener pada rangka menggunakan simulasi metode elemen hingga. Terdapat dua jenis rancangan yang disimulasikan, yaitu rangka dengan penambahan stiffener dan rangka tanpa stiffener sebagai pembanding. Kedua rancangan rangka dibuat dengan menggunakan profil persegi dengan ketebalan 2.2 mm dari bahan baja ASTM A36. Jenis simulasi yang dipilih adalah simulasi pembebanan statis dengan beban yang terdiri dari beban penumpang serta beban komponen baterai dan sistem kontrol. Parameter yang hendak diperoleh dari simulasi antara lain tegangan von mises, defleksi total rangka, dan nilai safety factor. Hasil simulasi menunjukkan bahwa rancangan rangka dengan penambahan stiffener mengalami tegangan von mises maksimum sebesar 74.67 MPa, defleksi total maksimum sebesar 0.06692 mm, dan safety factor minimum sebesar 3.348. Sementara itu, rancangan tanpa penambahan stiffener mengalami tegangan von mises maksimum sebesar 110.3 MPa, defleksi total maksimum sebesar 0.5209 mm, serta nilai safety factor minimum sebesar 2.266.
Co-Authors Aji, Supa Kusuma Amrullah, Utsman Syah Chandra Gunawan Elka Faizal Hangga Wicaksono Kris Witono Moh. Nasir Nicky Suwandhy A. S Rilis Eka Perkasa