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在取自现有航空发动机燃烧室的点火预燃室上,试验研究了加氧对点火的改进。两种加氧方式一均匀加氧和局部加氧,都进行了研究。结果表明,加氧显著地改善了低压下的点火性能。局部加氧更好地发挥了加氧的作用。试验表明,燃油液雾蒸发百分数过低是造成点火性能差的原因。基于点火的热理论,导出了一个半经验半分析的方程,可以预计加氧对最大点火气流速度的相对增大。这方程可以很好地概括试验数据。形成一个具有适当氧浓度的滞止区是设计具有加氧的点火系统的最重要的考虑。
In the ignition pre-combustion chamber taken from the existing aero-engine combustion chamber, the improvement of ignition on oxygen was experimentally studied. Both methods of oxygen plus a uniform oxygen and local oxygen, have been studied. The results showed that oxygen addition significantly improved the ignition performance at low pressure. Local oxygen better play the role of oxygen. Experiments have shown that too low a percentage of fuel vaporization is the cause of poor ignition performance. Based on the heat theory of ignition, a semi-empirical semi-empirical equation was derived, and the relative increase of the maximum ignition airflow velocity can be predicted. This equation gives a good summary of the experimental data. Forming a stagnant zone with the proper oxygen concentration is the most important consideration in designing an ignition system with oxygen.