本文選題：荷電射流 + 流場測量��； 參考：《排灌機械工程學(xué)報》2017年10期

【摘要】：為了研究荷電射流噴嘴附近的卷吸流動,探討荷電電壓對卷吸的形成、發(fā)展以及對霧滴吸收SO_2的強化作用,采用粒子圖像速度場儀對不同荷電電壓下噴嘴附近的射流流動進行測量與分析,獲得了近噴嘴處荷電噴霧射流卷吸流動的速度矢量圖、速度云圖與流線圖,并進行了荷電噴霧煙氣脫硫傳質(zhì)試驗.試驗結(jié)果表明:在荷電壓作用下,噴嘴處荷電射流邊緣區(qū)存在不同于常規(guī)霧化的卷吸現(xiàn)象,而主射流區(qū)流場在靜電作用下變化并不明顯;隨著荷電電壓的升高,其環(huán)形電極附近場強不斷增大,在庫侖力與極化力作用下其卷吸程度加劇;卷吸流動能夠使霧滴與周圍氣體介質(zhì)產(chǎn)生較強的混摻作用,同時也是荷電射流復(fù)雜渦旋流動結(jié)構(gòu)形成的重要原因,可以提高脫硫效率達5%~10%.
[Abstract]:In order to study the entrainment flow near the charged jet nozzle, the formation and development of charged voltage on entrainment and the enhancement of droplet absorption of SO_2 were discussed. A particle image velocity field instrument is used to measure and analyze the jet flow near the nozzle under different charge voltages. The velocity vector diagram, velocity cloud diagram and streamline diagram of the entrainment flow of the charged spray jet near the nozzle are obtained. The mass transfer test of flue gas desulfurization by electric spray was also carried out. The experimental results show that, under the action of the charge voltage, the entrainment of the charged jet edge is different from that of the conventional atomization, but the flow field in the main jet zone does not change obviously under the electrostatic action, and with the increase of the charged voltage, the entrainment of the jet is different from that of the conventional atomization. The field strength near the annular electrode is increasing and the entrainment degree is increased under the action of the Kulun force and the polarization force, and the entrainment flow can make the fog droplet and the surrounding gas medium produce stronger mixing effect. At the same time, it is also an important reason for the formation of complex vortex flow structure of charged jet, which can improve the desulphurization efficiency up to 510.
【作者單位】： 南通開放大學(xué)機電工程學(xué)院;上海大學(xué)機電工程與自動化學(xué)院;江蘇大學(xué)能源與動力工程學(xué)院;
【基金】：江蘇高校自然科學(xué)基金資助項目(09KJD470001)
【分類號】：TQ021.4

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