中国物理B ›› 2018, Vol. 27 ›› Issue (3): 35203-035203.doi: 10.1088/1674-1056/27/3/035203
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Experimental investigation on electrical characteristics and ignition performance of multichannel plasma igniter
Sheng-Fang Huang(黄胜方), Hui-Min Song(宋慧敏), Yun Wu(吴云), Min Jia(贾敏), Di Jin(金迪), Zhi-Bo Zhang(张志波), Bing-Xuan Lin(林冰轩)
- 1 Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China;
2 Science and Technology on Plasma Dynamics Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
Experimental investigation on electrical characteristics and ignition performance of multichannel plasma igniter
Sheng-Fang Huang(黄胜方)1, Hui-Min Song(宋慧敏)1, Yun Wu(吴云)2, Min Jia(贾敏)1, Di Jin(金迪)1,2, Zhi-Bo Zhang(张志波)1, Bing-Xuan Lin(林冰轩)1,2
- 1 Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China;
2 Science and Technology on Plasma Dynamics Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
摘要：
Relighting of jet engines at high altitudes is very difficult because of the high velocity, low pressure, and low temperature of the inlet airflow. Successful ignition needs sufficient ignition energy to generate a spark kernel to induce a so-called critical flame initiation radius. However, at high altitudes with high-speed inlet airflow, the critical flame initiation radius becomes larger; therefore, traditional ignition technologies such as a semiconductor igniter (SI) become infeasible for use in high-altitude relighting of jet engines. In this study, to generate a large spark kernel to achieve successful ignition with high-speed inlet airflow, a new type of multichannel plasma igniter (MCPI) is proposed. Experiments on the electrical characteristics of the MCPI and SI were conducted under normal and sub-atmospheric pressures (P=10-100 kPa). Ignition experiments for the MCPI and SI with a kerosene/air mixture in a triple-swirler combustor under different velocities of inlet airflow (60-110 m/s), with a temperature of 473 K at standard atmospheric pressure, were investigated. Results show that the MCPI generates much more arc discharge energy than the SI under a constant pressure; for example, the MCPI generated 6.93% and 16.05% more arc discharge energy than that of the SI at 30 kPa and 50 kPa, respectively. Compared to the SI, the MCPI generates a larger area and height of plasma heating zone, and induces a much larger initial spark kernel. Furthermore, the lean ignition limit of the MCPI and SI decreases with an increase in the velocity of the inlet airflow, and the maximum velocity of inlet airflow where the SI and MCPI can achieve successful and reliable ignition is 88.7 m/s and 102.2 m/s, respectively. Therefore, the MCPI has the advantage of achieving successful ignition with high-speed inlet airflow and extends the average ignition speed boundary of the kerosene/air mixture by 15.2%.
中图分类号: (Arcs; sparks; lightning; atmospheric electricity)
- 52.80.Mg