A New Ignition System for Pulse Detonation Engine
A New Ignition System for Pulse Detonation Engine
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DOI：
10.2514/6.2004-308
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发表时间：
2004-01
期刊：
影响因子：
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通讯作者：
H. Shimada;Y. Kenmoku;Hiroyuki Sato;A. Hayashi
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文献类型：
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作者：
H. Shimada;Y. Kenmoku;Hiroyuki Sato;A. Hayashi
脉冲爆震发动机（PDE）采用了一种新型点火系统，即火焰喷射点火（FJI）系统，以增强爆燃到爆震过渡（DDT）的时间和长度。 FJI 的想法并不新鲜，但它在偏微分方程中的应用还从未见过。本研究旨在通过与传统火花点火（CSI）系统进行比较来展示 FJI 到 PDE 的可行性。 FJI系统有一个体积为0.5-12.8 cm 3 的小子室，带有火花塞，在PDE主室中产生大量离子和自由基。研究了三个课题：1）优化 FJI 子室的最佳配置以获得其基本设计，2）使用最佳 FJI 配置评估多循环操作的 FJI 性能，3）通过 PDE 室中的 FJI 系统可视化点火机制。所有实验还与 CSI 系统操作的实验进行了比较。至于结果，FJI 系统的最佳尺寸和设计是使用无量纲值获得的。 FJI 系统被证明是最有效的点火系统，与 CSI 系统相比，DDT 时间缩短了 3.9 倍。 Schlieren 电影中的喷射系统可视化揭示了 FJI 系统更快的火焰点火和传播的本质。
A new ignition system is applied to pulse detonation engine (PDE), which is flame jet ignition (FJI) system, to enhance a deflagration to detonation transition (DDT) time and length. The idea of FJI is not new, but its use to PDE has not been seen ever. The present study is to show the feasibility of FJI to PDE by comparing with a conventional spark ignition (CSI) system. FJI system has a small sub-chamber of 0.5-12.8 cm 3 in volume with a spark plug to produce a lot of ions and radicals in the PDE main chamber. Three subjects are studied: 1) to optimize the best configuration of FJI sub-chamber to obtain its basic design, 2) to evaluate FJI performance on multi-cycle operation using the best FJI configuration, 3) to visualize the ignition mechanism by FJI system in the PDE chamber. All experiments are also compared with those operated by the CSI system. As for results, the best size and design for FJI system is obtained using a non-dimensional value. The FJI system is shown to be a most effective ignition system to shorten DDT time by a factor of 3.9 comparing with the CSI system. A visualization of injection system by Schlieren movies reveals the essence of faster flame ignition and propagation by FJI system.