不同初始温度下等离子体对H2/Air混合物燃烧影响

Effects of plasma on the combustion of H2/Air mixture under different initial temperatures

关键词:  等离子体  助燃  化学动力学模型  活性粒子

Key words:  Plasma  Assisted combustion  Chemical kinetic model  Active particles

摘要:

等离子体助燃过程是一个非平衡的,瞬时的,极不均匀的物理化学过程,活性粒子在等离子体助燃计算中是一个关键难题。文章建立H2/Air燃烧的化学动力学模型,计算与分析了在非平衡等离子体条件下,气体放电产生的活性粒子(O,H)和活性基(OH)在不同初始温度下对燃烧过程中参与燃烧的组分以及温度和压力的影响,为航空发动机燃烧室等离子体助燃实验研究和实际应用提供理论依据。数学模型的计算结果表明等离子体助燃可以提高反应效率,缩短延迟时间,增加燃烧温度,火焰传播速率,强烈影响H2/Air混合物燃烧效果。

Abstract:

Plasma assisted combustion process is a non-equilibrium,non-uniform and transient physical chemistry process. Active particle is a key problem in the calculation of plasma assisted combustion. The combustion chemical kinetic model of H2/Air is established. The non-equilibrium plasma conditions which the active particle(O,H) and (OH) produced by gas discharge influence the components, temperature and pressure in the combustion process under different initial temperature were calculated and analysed. It provides theoretical base for the experiment and application of plasma assisted combustion in aircraft engine combustion chamber. The results show that plasma assisted combustion can improve reaction efficiency, reduce combustion rise time, increase combustion temperature and flame propagation velocity and strongly influence H2/Air mixture combustion.