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All Journal Majalah Ilmiah MOMENTUM Turbo : Jurnal Program Studi Teknik Mesin JURNAL TEKNIK Motor Bakar : Jurnal Teknik Mesin DEVICE Community Services and Social Work Bulletin Prosiding Seminar Nasional Rekayasa dan Teknologi (TAU SNAR- TEK)
Yafid Effendi
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50239
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Bahasa Inggris: Bahasa Inggris Safi'i, Muhamad; Irfan, Akhmad; Muhammad, Rouf; Suheri, Suheri; Effendi, Yafid
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.15451

Abstract

Cavitation is a major issue in centrifugal pumps because it impacts their performance and efficiency. Experimental research was conducted to investigate the effect of the number of impeller blades and mass flow rate on the cavitation phenomenon in centrifugal pumps, as well as to characterize them. The Ebara brand centrifugal pump type 65x50 FSS4JA used in the TCU installation of the Casting Machine has a number of blades of 4 and 6 with a fixed inclination angle of 60° as the object of research. The fluid mass flow rate varies with values ​​of 1.67 kg/s, 3.33 kg/s, 5.67 kg/s, and 7.33 kg/s. The research findings show that the highest cavitation occurs in the centrifugal pump with 4 blades, with an NPSH value reaching 2.02 at a mass flow rate of 5.67 kg/s, while the lowest value is found in the pump with 6 blades with an NPSH of 1.88 at a mass flow rate of 7.33 kg/s. A 6-blade centrifugal pump operating at a mass flow rate of 7.33 kg/s demonstrated the best results in this study and is feasible for field application. Keywords: Impeller, Cavitation, Pump, Centrifugal.
Peningkatan Performa Termal Dengan Menggunakan Vortex Generators Didalam Saluran Persegi Panjang Effendi, Yafid; Rosyidin, Ali; Setiawan, Bambang
Jurnal Teknik Vol. 13 No. 1 (2024): Januari - Juli 2024
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jt.v13i2.14222

Abstract

Vortex generators (VGs) are an effective method for improving the thermal performance of heat exchangers. This study aims to optimize the heat transfer rate by employing VGs, where airflow passes over a heated cylinder within a rectangular duct equipped with vortex generators. An experimental approach was conducted to investigate the enhancement of heat transfer using concave delta winglet (CDW) and delta winglet (DW) VGs, compared to the baseline condition without VGs. The experiments involved variations in the angle of attack (β) at 10°, one VG pairs, and the arrangement types (in-line and staggered). The cylinder was heated with a constant power of 35 W, reaching a surface temperature of 38 °C, and airflow velocities ranged from 0.4 to 2 m/s. Temperature measurements were taken at the inlet, outlet, and cylinder surface using thermocouples. The research results indicate a significant enhancement in the convective heat transfer coefficient when using vortex generators (VGs). Among the various configurations tested, the staggered concave delta winglet pair (CDW) arrangement demonstrated the highest values in terms of convective heat transfer coefficient, friction factor ratio, and performance evaluation criterion (PEC), followed by the in-line CDW, staggered delta winglet pair (DW), and in-line DW configurations. The highest convective heat transfer coefficient was observed in the staggered CDW configuration, reaching 16.02%. The friction factor ratio (f/fo) for this configuration was 108.67%. The highest PEC value, 26.34%, was achieved with a single staggered CDW pair at a Reynolds number of Re = 11,000.
Co-Authors Ahmad Ramdhani, Ahmad Alvian Demaz Peramutya Ashar, Ilham Ariawan Bambang Setiawan Dwi Setiawan, Agung Efrizal Efrizal Fahmi, Muhammad Idrokul Farhan Putra Arya, M. Iqbal Fattah, Fanni Irfan, Akhmad Muhammad Taufan Muhammad, Rouf Mujiono Mujiono Nugroho, Agung Oktarina Heriyani Pangestu, Anugrah Widhi Pratama, Putra Dafa Ramadan, Hamdan Riyanto Riyanto Rizki Dwi Ardika Rohmat Taufiq Rosyidin, Ali Rozaki, Syahrul Maulana Safi'i, Muhamad Saputra, Muhamad Juli Suheri Suheri Kertosenjoyo2, Suheri Susanto Susanto Waluyo, Bambang Suhardi Wibi Pramanda