Abstract

Recently, the usage of oxygenated fuel has emerged as a reliable way to enhance engine performance. Due to this matter, the potential of microbubbles (MB) mixed fuel in improving engine performance is anticipated. Being small in size, MB are characterized by having unique characteristics such as low rising speed and self-pressurization which can contribute to fuel oxygenation. In this study, the fundamental characteristics of MB in diesel and water medium were investigated. The MB are produced by shearing air into the high pressurized fluid. Then the life span as well as the size distribution of the MB in both mediums were observed. MB in water shrink faster compared to MB in diesel despite the differences in size range. As for size distribution, no significant tendency can be seen between both mediums.

Highlights

  • Diesel engines are indispensable in power generation and transportation sector due to their efficiency and durability over gasoline engines

  • Continuous efforts and study have focused on the diesel fuel as it is regarded as an economical solution that can be adapted in the existing diesel engine without engine modification

  • As for the comparison between both mediums, MB in water shrink faster compared to MB in diesel despite the differences in size range

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Summary

Introduction

Diesel engines are indispensable in power generation and transportation sector due to their efficiency and durability over gasoline engines. Continuous efforts and study have focused on the diesel fuel as it is regarded as an economical solution that can be adapted in the existing diesel engine without engine modification Among those studies, recently, water-mixed fuel has emerged as one of the most popular method [1]–[5]. The emulsification technique is the most effective technique as it can reduce nitrogen oxide (NO) emissions and particulate matter (PM) emission while simultaneously promote the combustion efficiency Another eminent additive in diesel fuel is alcohol[6], [1]. In this project, engine performance as well as fuel efficiency will be investigated using air mixed with fuel by injecting micro-sized bubbles prior to injection stage. In this paper, preliminary experiments were done, where the characteristics of MB in diesel fuel and water were compared

Small size
Low rising speed
Shrinking and dissolution
MB application in diesel engine
Methodology
Bubble’s life span
Size distribution
Discussions
Full Text
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