Analysis of flame stabilization limit in a cylindrical of step micro-combustor with different material through the numerical simulation

Herman Saputro,Aris Purwanto,Heri Juwantono,Valiant L P Sutrisno,Danar S Wijayanto,Tutuko Firdani,Fudhail A Munir,Eka D Ariyanto,Riyadi Muslim,Laila Fitriana,Marshal Bima,Yuda Pratama,Ade Gafar Abdullah,Asep Bayu Dani Nandiyanto

doi:10.1051/matecconf/201819708003

Abstract

The flame stabilization limit on micro-combustor had studied to support the micro power generator system. Micro-combustion became the crucial components in a micro power generation system as heat resource that will be converted into electricity. However, the unstable flame in micro-combustor became the main problem that faced by researchers, especially the excess of heat losses. The objective of this study is to observe the flame stabilization limit in a rearward facing step micro-combustor. This study was focused on the effect of micro-combustor material and flame stabilization through the numerical simulation. The micro-combustor material that was used in this study is quartz glass and stainless steel. Micro-combustor was divided into unburned region and burned region. The dimensions of micro-combustor are 3.5 mm inner diameter of unburned region, 4.5 mm inner diameter of burned region and 1 mm thickness. The results have shown that the material of micro-combustor and model of the flame holder have direct relationship with the characteristics of flame stabilization in the micro-combustors. The effects of the flame holder designs and micro-combustors dimensions on the flame stabilization were discussed in detail in this paper.

Highlights

In recent years, the innovation of electronic devices has been steadily increasing and leading to a small, portable and lightweight form
The stable flame area of the combustor type of rearward step with wire mesh and the equivalent ratio φ=1 occurs in flow velocity between 0.082 - 0.6 m/s and 0.1 - 0.6 m/s
The blow off limit area for stainless steel and quartz glass material occurs in the same flow velocity (U) that is greater than 0.6 m/s

Summary

Introduction

The innovation of electronic devices has been steadily increasing and leading to a small, portable and lightweight form. The improvement of this innovation needs to be accompanied by the provision of reliable power supply devices (batteries). The development of electronic equipment has led to innovation and research on power generation such as lithium-ion batteries and micro/meso power generators [2], [3], [4] and [5]. The development of hydrocarbon-fueled hydrocarbon-based power generating devices has attracted much attention because hydrocarbons have much higher energy density than traditional batteries

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Discussion

Conclusion