Abstract
A meso-scale vortex combustor has been designed in order to common flame quenching problems in meso/micro scale burning. Numerical simulations using Computational Fluid Dynamic (CFD) Ansys Release 19.0 Academic program was performed to determine a stable combustion flame. Combustor chamber made from two steps, first step diameter 6 mm with 4 mm depth, second step diameter size 8mm with 5 mm depth. This simulation used mixture of propane fuel-air. The fuel is fed through two channels of fuel inlet with 2 mm diameter. The variable of fuel flow rate was investigated in order to get the boundary of extinction limit and blow off limit of flame (stable flame region). The results show that the flame stable limit by using meso-scale vortex combustor more widely than other types of micro combustor. Therefore, the meso-scale vortex combustor that was developed could be used to overcome the flame quenching problems.
Highlights
Research on micro-meso combustion is intense developed in this decade
Micro combustion has been combined with thermoelectric generator (TEG) [3,4,6,7,8,9,10] Thermophotovoltaic (TPV) [5,11,12] to generate electrical energy
A meso scale combustor vortex was analyzed in numerical simulation to determine the range of stable flame and maximum temperature that can be produced in certain velocity inlets
Summary
Research on micro-meso combustion is intense developed in this decade. Micro combustion is developed for several purposes such as micro-scale drives [1,2] and micro-scale energy generation [3,4,5,6,7,8,9,10]. Combustor vortex has advantages; flame vortex has a range of stability equivalent ratio [21]. Combustor vortex was successfully integrated with a micro scale power plant, capable of generating a maximum energy of 8.1 W (9.8Vx0.83A) using a double thermoelectric device, concluding from this research that the heat transfer from flame to the combustor wall increased significantly with vortex flow, resulting in a relatively higher energy efficiency [7]. CFDs are used to determine the probability of flame stability on meso-scale combustion tubes with wire mesh [14]. A meso scale combustor vortex was analyzed in numerical simulation to determine the range of stable flame and maximum temperature that can be produced in certain velocity inlets. The software used is Fluet Ansys Release 19.0 Academic version
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