本文選題：氣水噴霧　切入點：噴嘴流量　出處：《煤炭學報》2017年05期 　論文類型：期刊論文

【摘要】：為了分析煤礦井下氣水噴霧霧化特性,基于自行設計的氣水噴霧實驗平臺,采用電磁流量計、空氣質(zhì)量流量計及馬爾文實時高速噴霧粒度分析儀對空氣霧化噴嘴流量特性、霧化粒度的空間分布規(guī)律及影響因素開展了實驗研究。結(jié)果表明:隨著供水壓力的增加,噴嘴耗氣量以指數(shù)形式不斷遞減,而耗水量以指數(shù)形式遞增;噴嘴耗氣量隨供氣壓力以指數(shù)形式遞增,而噴嘴耗水量基本呈現(xiàn)線性遞減趨勢。霧滴粒徑沿噴嘴軸線方向不斷增大;距離噴嘴較近的縱斷面上,霧滴粒徑沿徑向不斷增大,并呈現(xiàn)不對稱分布;位于霧流中部的縱斷面上,軸線附近區(qū)域霧滴粒徑沿徑向不斷增大,而霧流外部區(qū)域霧滴粒徑呈現(xiàn)沿重力方向增大的趨勢;在靠近霧流末端衰減區(qū)內(nèi),霧滴粒徑沿重力方向不斷增大。供氣壓力一定時,霧滴粒徑隨著供水壓力的增加呈現(xiàn)先增大后減小的變化規(guī)律,且供氣壓力越大所對應的拐點水壓越高;隨著供氣壓力的增加,霧滴粒徑不斷減小,且減小幅度隨供氣壓力增加而有所下降。
[Abstract]:In order to analyze the atomization characteristics of air-water spray in coal mine, based on the air-water spray experimental platform designed by ourselves, electromagnetic Flowmeter, Air quality Flowmeter and Ma Erwen real-time high-speed spray particle size analyzer were used to analyze the flow characteristics of air-atomizing nozzle. The spatial distribution of atomization particle size and its influencing factors were studied experimentally. The results show that with the increase of water supply pressure, the nozzle gas consumption decreases exponentially, while the water consumption increases exponentially. The gas consumption of the nozzle increases exponentially with the air supply pressure, and the water consumption of the nozzle decreases linearly. The droplet size increases along the axis of the nozzle, and on the longitudinal section near the nozzle, the droplet size increases along the radial direction. In the longitudinal section of the middle of the fog flow, the diameter of droplet in the area near the axis increases along the radial direction, while the diameter of the droplet in the outer region of the flow increases along the direction of gravity, and in the attenuation region near the end of the fog flow, the droplet size increases along the direction of gravity. The diameter of droplet increases along the direction of gravity. When the supply pressure is constant, the diameter of droplet increases first and then decreases with the increase of water supply pressure, and the higher the pressure of supply gas is, the higher the water pressure is at the corresponding inflection point, and the higher the pressure of supplying gas is, The particle size of droplet decreases and the decreasing amplitude decreases with the increase of gas supply pressure.
【作者單位】： 湖南科技大學南方煤礦瓦斯與頂板災害控制安全生產(chǎn)重點實驗室;湖南科技大學煤礦安全開采技術(shù)湖南省重點實驗室;
【基金】：國家自然科學基金資助項目(U1361118,51574123) 中國博士后科學基金資助項目(2015M582118)
【分類號】：TD714.41
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本文編號：1623157