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Technical Brief

An experimental study of friction and wear characteristics of sunflower and soybean oil methyl ester in the Steady State Conditions by Four-ball Wear Testing Machine

[+] Author and Article Information
Mahmoud Amiri Nazari Barsari

Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran; Modern Manufacturing Technologies Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran
m.amirinazari.b@gmail.com

Alireza Shirneshan

Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran; Modern Manufacturing Technologies Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran
arshirneshan@yahoo.com

1Corresponding author.

ASME doi:10.1115/1.4042390 History: Received August 16, 2018; Revised December 14, 2018

Abstract

According to that the fuel pump and injectors of the diesel engines are lubricated by the fuel itself so the lubrication property of the fuels is an important issue in internal combustion engines. Biodiesel is one of the most famous biofuels that can be used in diesel engines. In this research, wear characteristics of biodiesel derived from sunflower and soybean oil blends was investigated. The five fuel blends were tested in steady state conditions (with duration 1500 and 3600 seconds) at four different rotational speed of 600, 900, 1200 and 1500 rpm. Optical microscope was also applied to check out the worn surfaces of the balls. Results indicated that wear and friction as tribological properties were reduced with the increase of rotating speed in the steady- state condition. It was found that with an increase in biodiesel concentration the friction coefficient was reduced at lower rotating speeds due to free fatty acids, monoglycerides and diglycerides as the components of biodiesel which help improve the lubrication properties of biodiesel and reduce the friction more than that of other blends. However in higher rotational speeds, friction and wear of fuel blends included biodiesel increased due to reduced viscosity as the causes of oxidation which helps to exposure of biodiesel to air at higher temperature. So B100 has better lubricity properties compared to other fuel blends at lower rotational speeds and better performance belongs to B20 at higher rotational speeds.

Copyright (c) 2018 by ASME
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