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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Combustion Oscillation Analysis of Premixed Flames at Elevated Pressures
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Combustion Oscillation Analysis of Premixed Flames at Elevated Pressures

机译：高压预混火焰的燃烧振荡分析

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摘要

A new analytical time lag flame model based on Bloxidge's flame model was introduced, which calculates the combustion oscillation of premixed flame to take into account the distribution of heat release rate and flame speed that was calculated by analytical formulas dependent on pressure, temperature, fuel-to-air ratio and velocity. The transfer matrix technique using the new flame model was applied to the calculation of acoustic resonance characteristics. To verify the model, combustion oscillation experiments were performed for methane-air premixed flames stabilized by a swirl burner at elevated pressures in a range of 0.6-0.9 MPa. The fluctuating pressure had a maximum peak at a specific value of fτ_f, where f is the resonance frequency and τ_f is the passing time of premixed gas through the flame zone. The analytical model could simulate the dependency of the fluctuating pressure local peak on the fuel-to-air ratio and the static pressure.
机译：引入了一种基于Bloxidge火焰模型的新的时滞火焰分析模型，该模型计算了预混火焰的燃烧振荡，并考虑了放热率和火焰速度的分布，该分布是根据压力，温度，燃料-空气比和速度。使用新火焰模型的传递矩阵技术被应用于声共振特性的计算。为了验证该模型，对在0.6-0.9 MPa范围内的高压下由旋流燃烧器稳定的甲烷-空气预混火焰进行了燃烧振荡实验。脉动压力在特定值fτ_f处具有最大峰值，其中f是共振频率，τ_f是预混合气体通过火焰区的时间。该分析模型可以模拟波动压力局部峰值对燃料空气比和静压的依赖性。

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