本文選題：火花放電　切入點(diǎn)：放電特性　出處：《沈陽航空航天大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在石油、化工、醫(yī)藥、危險(xiǎn)化學(xué)品儲(chǔ)運(yùn)等行業(yè),由于電火花引燃導(dǎo)致的爆炸事故時(shí)有發(fā)生。但對(duì)事故的深入調(diào)查顯示,電火花在其發(fā)生、發(fā)展過程中的能量轉(zhuǎn)移過程是復(fù)雜的,即表現(xiàn)為對(duì)預(yù)混爆炸環(huán)境點(diǎn)燃的較強(qiáng)隨機(jī)性。伴隨近代工業(yè)發(fā)展帶來的危險(xiǎn)化學(xué)品生產(chǎn)、使用量的高速增加,以及高阻物料的比例提升,電火花引燃風(fēng)險(xiǎn)越來越引起人們的關(guān)注,電火花放電過程能量分布及其釋放規(guī)律的研究,以及電火花引燃過程的關(guān)鍵參數(shù)研究又成為了研究的新熱點(diǎn)。本文依托柱形容器預(yù)混氣體爆炸實(shí)驗(yàn)裝置,應(yīng)用自制的電容儲(chǔ)能放電點(diǎn)火裝置,采用理論與實(shí)驗(yàn)相結(jié)合的方法,對(duì)電火花放電物理過程、電火花間隙能量釋放過程及電火花能量功率變化對(duì)點(diǎn)火能力的影響進(jìn)行了研究。實(shí)驗(yàn)發(fā)現(xiàn),電容儲(chǔ)能高壓間隙擊穿放電過程呈明顯的間隙擊穿和間隙擊穿后的振蕩續(xù)流兩個(gè)過程,而電火花能量的釋放主要發(fā)生在間隙擊穿后的振蕩續(xù)流過程。觀察間隙擊穿后的振蕩續(xù)流階段間隙電壓、電流曲線,可以得到由于放電回路的電阻損耗效應(yīng),放電間隙中的能量釋放呈現(xiàn)明顯的衰減性。針對(duì)濃度為5%的液化石油氣進(jìn)行火花引燃實(shí)驗(yàn),發(fā)現(xiàn)電火花能量釋放的總釋放能、功率對(duì)其點(diǎn)火能力均存在影響,電火花功率影響更為明顯。電火花引燃機(jī)制的研究將為電氣防爆技術(shù)的完善和應(yīng)用提供進(jìn)一步的理論依據(jù),為生產(chǎn)過程安全條件的確立提供有價(jià)值的數(shù)據(jù)支撐。
[Abstract]:In the petroleum, chemical, pharmaceutical, hazardous chemical storage and transportation industries, explosion accidents caused by the ignition of electric sparks occur from time to time. However, an in-depth investigation of the accidents shows that the process of energy transfer during the occurrence and development of electrical sparks is complex. That is, the strong randomness of igniting the premixed explosive environment. With the development of modern industry, the production of dangerous chemicals, the rapid increase in the use of chemicals, and the increase in the proportion of high-resistivity materials, People pay more and more attention to the risk of spark ignition. Research on key parameters of EDM ignition process has become a new research hotspot. In this paper, based on the experimental device of premixed gas explosion of columnar container, the self-made capacitor energy storage discharge igniting device is used, and the method of combining theory with experiment is adopted. The effects of the physical process of electric spark discharge, the energy release process of electric spark gap and the change of energy power of electric spark on the ignition ability are studied. The process of capacitor energy storage high voltage gap breakdown and discharge is obvious gap breakdown and oscillation continuous current after gap breakdown. However, the release of EDM energy mainly occurs in the oscillatory continuation process after gap breakdown. Observing the gap voltage and current curve after gap breakdown, the resistance loss effect of the discharge loop can be obtained. The energy release in the discharge gap is obviously attenuated. In the spark ignition experiment of liquefied petroleum gas (LPG) with concentration of 5%, it is found that the total energy released by the discharge energy and the power have an effect on the ignition ability. The study of EDM ignition mechanism will provide further theoretical basis for the improvement and application of electrical explosion proof technology and provide valuable data support for the establishment of safety conditions in production process.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ086.52

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