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All Journal Rekayasa Mesin Dinamika Bahari: Journal of Maritime Dynamic Saintara : Jurnal Ilmiah Ilmu-Ilmu Maritim ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Maritim Polimarin Jurnal Masyarakat Mengabdi Nusantara Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia
Yulius Oscar
Politeknik Maritim Negeri Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Physics Social Sciences Transportation

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An Experimental Study of Ventury Ejector Performance with Varied Dimensions and Primary Pressures Susanto, Susanto; Khaeroman, Khaeroman; Oscar, Yulius; Ngatmin, Ngatmin
Jurnal Rekayasa Mesin Vol. 17 No. 2 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.v17i2.2069

Abstract

Supersonic suction from the ejector nozzle chamber creates a high vacuum effect. Supersonic suction is the high-speed suction from secondary suction effect of high-pressure flow velocity from the primary flow nozzle. Velocities in supersonic jet cores can reach more than 238 m/s. Many industrial and household machining applications make use of ejectors for creating a vacuum, transferring fluids, and handling solid materials. Ejectors for household machining applications are widely sold with various dimensions ranging from 0.25 to 2 inches. This study was conducted to determine the performance of each ejector by calculating the entrainment ratio value. This experimental study was carried using 3 ejectors measuring 0.5, 0.75 and 1 inch, respectively. The test was carried out by providing inlet pressure on the primary channel sides. The inlet pressure was varied successively from 0.5, 1.0, 1.5, 2.0 and 2.5 bar. The pressure variation was made by adjusting the bypass valve opening position on the primary channel. Measuring the flow discharge on the secondary flow and primary flow sides is necessary to calculate the mass flow rate on each side. The results obtained the entrainment ratio for each ejector size. The 0.5-inch ejector obtained the best performance of 37.1% with an inlet pressure of 2 bar. The 0.75-inch ejector obtained the best performance of 37.7% when the inlet pressure was 2.5 bar. An inlet pressure of 2.5 bar on the 1-inch ejector was able to provide the best performance of 34.5%. Ejector performance will achieve the maximum point if the nozzle geometry, pressure in the primary flow is appropriate. The study concluded that in the application of ejectors, it is necessary to consider the geometry, and the designed primary flow pressure.
Co-Authors Akhmad Nuriyanis Arif Rakhman Suharso Ario Hendartono Deri Herdawan Fitri Suprapti Gunawan Budi Santoso Gunawan Budi Santoso Heri Kiswanto Iqbal Alansyah, Fardian Juwarlan Juwarlan Juwarlan, Juwarlan Khaeroman, Khaeroman Ngatmin Ngatmin Ngatmin Ngatmin Ngatmin, Ngatmin Noviarianto, Noviarianto Prijo Harsono Rahim Subliansyah Putra Shendi May Rudin Susanto Susanto Susanto, Susanto Suyono Suyono Suyono Suyono Wahyu Ari Putranto Widar Bayu Wantoro