【摘要】：微波點火是一種具有發(fā)展前景的點火方式,然而目前的微波點火方法大多采用1/4同軸諧振腔作為點火裝置,點火效果較差。為改進這種微波點火方法,對圓柱形微波諧振腔展開研究,提出了基于圓柱形諧振腔的微波點火方法。圓柱形諧振腔主要有TE_(111)和TM_(010)這2種諧振模式。通過理論分析和仿真模擬,分別設(shè)計了基于2種諧振模式的試驗裝置。得到結(jié)果如下:利用基于TE_(111)諧振模式的試驗裝置成功實現(xiàn)了點火,但是工作氣壓較低,只有0.012 MPa;而利用基于TM_(010)諧振模式的試驗裝置可實現(xiàn)1MPa下的穩(wěn)定點火,這種點火方式可以提高點火可靠性、拓寬稀薄燃燒的極限。此外,還通過在TM_(010)諧振腔內(nèi)部增加多個金屬尖端的方式實現(xiàn)了多點點火。與火花塞點火相比,微波點火方法可以加快燃燒速度、提高熱效率,使其到達壓力峰值的時間縮短15%,同時可以提高5%的峰值壓力。
[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.
【作者單位】： 清華大學(xué)電機工程與應(yīng)用電子系;冀北電力有限公司經(jīng)濟技術(shù)研究院;清華大學(xué)汽車安全與節(jié)能國家重點實驗室;
【基金】：國家自然科學(xué)基金(51176098;1177085)~~
【分類號】：U463.64
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本文編號：2319659