The Numerical Simulation And Experimental Study On The Flow And Heat Transfer Characteristics Of A Micro-combustor

Combustion in a micro-combustor is a complex physical and chemical phenomena.Many current comprehensive to this is based upon experimental results, so that there are needs to understand combustion behaviors visibly and numerically, and even to predict the performances for a design prototype.The understandings to combustion and the improvement of computer performance make it possible to simulate fluid flow,heat transfer and combustion in a micro-combustor.The purpose of this thesis is to investigate internal flow and heat transfer in a micro-combustor based on commercial software FLUENT.A numerical model is established by using the RNG k-e turbulence model and the coupled heat transfer exchanging model of FLUENT.The fluid flow and heat transfer both in combustion chamber and in water cooling chamber of the combustor are simulated. By comparing with the result of experiment,the mathematical model is repeatedly fitted and adjusted.The result of numerical simulation has been analyzed and some qualitative proposals are presented to study the performance and to improve the structure of the combustion.In order to improve the distribution of the flow field,the performance of heat transfer and combustion further,an orthogonal test with 12 factors under 3 levels are simulated in FLUENT to find out the factors that are significant to the power of the combustion.And ultimately it is found that 3 structure parameters are significant.Through experiment,it is verified that the numerical simulation can accurately reflect the experiments' rules.