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Experimental study of the Effect of the Blades of Number on Characteristics Pico Bulb Turbine on Horizontal Flow

Studi Eksperimental Pengaruh Jumlah Sudu terhadap Unjuk Kerja Pico Bulb Turbine Aliran Horisontal

*Dwi Aries Himawanto  -  Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret, Indonesia
Akhmad Nurdin  -  Program Studi Teknologi Pengecoran Logam, Politeknik Manufaktur Ceper, Indonesia
Hasan Bisri  -  Jurusan Otomotif, SMKN 1 Sine Ngawi, Indonesia
Open Access Copyright (c) 2021 TEKNIK

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Abstract
This study discusses the effect of the number of blades on a horizontal flow propeller turbine performance on a small scale experimentally. The development of small-scale water turbines has made many advances, including water turbines with the horizontal flow. Water turbines in horizontal flow can be applied to irrigation systems, piping systems, the wastewater treatment channel, and other closed channels. Pengukuran dynamic head pada aliran horisontal berdasarkan nilai pressure drop atau perbedaan tekanan sebelum dan sesudah turbin. Dynamic head measurement on the horizontal flow is based on pressure drop values or pressure before and after the turbine. Static bulbs placed before the turbine aim to increase the speed of water flow and potentially improve turbine performance. This study aims to determine the effect of the number of blades on the performance and efficiency of propeller turbines. The blade angle used is 200 with a bulb ratio of 0.6 to the pipe diameter. The variations in the number of blades used were 4, 5, 6, and 7, with each tested at 7 L / s, 9 L / s, 11 L / s, and 13 L / s. The results of this study indicate the number of blades 5 with a discharge of 13 L / s shows the best turbine performance compared to the number of other blades, besides that the number of blades 5 with a flow rate of 13 L / s shows the best efficiency value of around 40%.
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Keywords: propeller; number of blades; dynamic head; bulb

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