基于圆柱形谐振腔的微波点火方法
发布时间：2018-11-08 20:57
【摘要】：微波点火是一种具有发展前景的点火方式,然而目前的微波点火方法大多采用1/4同轴谐振腔作为点火装置,点火效果较差。为改进这种微波点火方法,对圆柱形微波谐振腔展开研究,提出了基于圆柱形谐振腔的微波点火方法。圆柱形谐振腔主要有TE_(111)和TM_(010)这2种谐振模式。通过理论分析和仿真模拟,分别设计了基于2种谐振模式的试验装置。得到结果如下:利用基于TE_(111)谐振模式的试验装置成功实现了点火,但是工作气压较低,只有0.012 MPa;而利用基于TM_(010)谐振模式的试验装置可实现1MPa下的稳定点火,这种点火方式可以提高点火可靠性、拓宽稀薄燃烧的极限。此外,还通过在TM_(010)谐振腔内部增加多个金属尖端的方式实现了多点点火。与火花塞点火相比,微波点火方法可以加快燃烧速度、提高热效率,使其到达压力峰值的时间缩短15%,同时可以提高5%的峰值压力。
[Abstract]:Microwave ignition is a promising ignition method. However, most of the current microwave ignition methods use 1 / 4 coaxial resonator as ignition device, and the ignition effect is poor. In order to improve the microwave igniting method, the cylindrical microwave resonator is studied, and a microwave igniting method based on the cylindrical resonator is proposed. There are two kinds of resonators: TE_ (111) and TM_ (010). Through theoretical analysis and simulation, the experimental devices based on two resonant modes are designed. The results are as follows: the experimental device based on TE_ (111) resonant mode has been successfully used to ignite fire, but the working pressure is low, only 0.012 MPa;. The stable ignition under 1MPa can be realized by using the experimental device based on TM_ (010) resonant mode, which can improve the reliability of ignition and widen the limit of lean combustion. In addition, multiple ignition is achieved by adding multiple metal tips to the TM_ (010) resonator. Compared with spark plug ignition, microwave ignition method can accelerate combustion speed, improve thermal efficiency, shorten the time to peak pressure by 15%, and increase peak pressure by 5% at the same time.
【作者单位】： 清华大学电机工程与应用电子系;冀北电力有限公司经济技术研究院;清华大学汽车安全与节能国家重点实验室;
【基金】：国家自然科学基金(51176098;1177085)~~
【分类号】：U463.64
，
本文编号：2319659
[Abstract]:Microwave ignition is a promising ignition method. However, most of the current microwave ignition methods use 1 / 4 coaxial resonator as ignition device, and the ignition effect is poor. In order to improve the microwave igniting method, the cylindrical microwave resonator is studied, and a microwave igniting method based on the cylindrical resonator is proposed. There are two kinds of resonators: TE_ (111) and TM_ (010). Through theoretical analysis and simulation, the experimental devices based on two resonant modes are designed. The results are as follows: the experimental device based on TE_ (111) resonant mode has been successfully used to ignite fire, but the working pressure is low, only 0.012 MPa;. The stable ignition under 1MPa can be realized by using the experimental device based on TM_ (010) resonant mode, which can improve the reliability of ignition and widen the limit of lean combustion. In addition, multiple ignition is achieved by adding multiple metal tips to the TM_ (010) resonator. Compared with spark plug ignition, microwave ignition method can accelerate combustion speed, improve thermal efficiency, shorten the time to peak pressure by 15%, and increase peak pressure by 5% at the same time.
【作者单位】： 清华大学电机工程与应用电子系;冀北电力有限公司经济技术研究院;清华大学汽车安全与节能国家重点实验室;
【基金】：国家自然科学基金(51176098;1177085)~~
【分类号】：U463.64
，
本文编号：2319659
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