本文關(guān)鍵詞： 帶電細水霧 高壓直流電源 荷質(zhì)比 滅火效能　出處：《沈陽航空航天大學》2013年碩士論文　論文類型：學位論文

【摘要】：隨著社會經(jīng)濟發(fā)展，科學技術(shù)的革新，，用火、用電、用氣、用油與日俱增，引發(fā)火災的因素復雜多樣，且呈立體化發(fā)展。細水霧以對環(huán)境友好、滅火迅速、耗水量低、破壞性小等特點，被看作鹵代烷的主要替代品，已獲得火災科學研究領(lǐng)域的基本共識。但是，以往的工作主要關(guān)注細水霧與多種類型火災的滅火效果，對如何提高細水霧滅火效率的研究相對較少，將帶電細水霧應用于滅火的研究則更為少見。 本文根據(jù)靜電感應原理給細水霧荷電，通過荷質(zhì)比來反映荷電效果，實驗研究了帶電細水霧的滅火效能。首先，結(jié)合液滴的帶電機理，采用感應荷電方式設計了使細水霧強制帶電的裝置，建立了細水霧感應荷電過程的電學模型。其次，參照孤立導體的電容分布原理搭建了測量荷質(zhì)比的實驗平臺，在不同電壓、電極環(huán)半徑和角度、感應電極間距的條件下，通過測量荷質(zhì)比來評價細水霧的荷電效果。最后，為了將其應用化，自行研制了小型高壓直流電源，并進行了帶電細水霧的滅火實驗，通過滅火時間、溫度變化以及煙氣成分分析了帶電細水霧滅火效能的影響因素。 結(jié)果表明：雙環(huán)電極方式的感應荷電效能最高，并且?guī)щ婌F滴的荷質(zhì)比隨著電壓的升高、電極環(huán)半徑和角度以及感應電極間距的減小而增大，荷質(zhì)比越大，荷電效果越好。同時，帶電細水霧能夠有效地降低火焰溫度、促進燃料的不完全燃燒，而且荷負電要比荷正電具有更好的抑制效果，隨著電壓的升高、電極環(huán)半徑、感應電極間距的減小，滅火效能提高，熄滅時間減少。
[Abstract]:With the development of society and economy, the innovation of science and technology, using fire, electricity, gas and oil are increasing with each passing day, the factors that cause fire are complex and diverse, and the water mist is friendly to the environment and extinguishes the fire quickly. The characteristics of low water consumption and low destructive, are regarded as the main alternatives to halogenated alkanes, which has gained the basic consensus in the field of fire scientific research. The previous work mainly focused on the fire extinguishing effect of water mist and various types of fire. The research on how to improve the fire extinguishing efficiency of water mist is relatively few, and the research on the application of live water mist to fire extinguishing is more rare. According to the principle of electrostatic induction, the charging effect of water mist is reflected by charging mass ratio, and the fire extinguishing efficiency of charged water mist is studied experimentally. Firstly, combined with the charged mechanism of liquid droplets. A device for forcing water mist to charge is designed by means of inductive charging. The electrical model of water mist induced charging process is established. Secondly. According to the principle of capacitance distribution of isolated conductors, an experimental platform is built to measure the charge / mass ratio under different voltage, radius and angle of the electrode ring, and inductive electrode spacing. The charging effect of water mist was evaluated by measuring the charge / mass ratio. Finally, in order to apply it, a small high voltage DC power supply was developed, and the fire extinguishing experiment of charged water mist was carried out, and the fire extinguishing time was passed. The influence factors of fire extinguishing efficiency of charged water mist were analyzed by temperature change and smoke composition. The results show that the double ring electrode has the highest inductive charge efficiency, and the charge / mass ratio of the charged droplet increases with the increase of voltage, the radius and angle of the electrode ring and the distance between the inductive electrodes, and the charge / mass ratio increases with the increase of the voltage. At the same time, charged water mist can effectively reduce the flame temperature, promote the incomplete combustion of fuel, and charge negative charge than positive charge has a better inhibition effect, with the increase of voltage. The radius of the electrode ring, the reduction of the distance between the inductive electrodes, the improvement of the fire extinguishing efficiency and the decrease of the extinguishing time.
【學位授予單位】：沈陽航空航天大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU892

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