預(yù)膜式桿射哨超聲波噴嘴霧化特性研究
發(fā)布時(shí)間:2018-01-18 15:32
本文關(guān)鍵詞:預(yù)膜式桿射哨超聲波噴嘴霧化特性研究 出處:《推進(jìn)技術(shù)》2016年06期 論文類(lèi)型:期刊論文
更多相關(guān)文章: 超聲波噴嘴 霧化特性 流量特性 噴霧角度 平均粒徑
【摘要】:為了探索超聲波噴嘴應(yīng)用于脈沖爆震發(fā)動(dòng)機(jī)的可行性,設(shè)計(jì)了一種預(yù)膜式桿射哨超聲波噴嘴,并采用激光粒度儀和高速相機(jī)對(duì)其霧化特性進(jìn)行了實(shí)驗(yàn)研究,得到了其流量特性、液滴索太爾平均直徑SMD和霧化角度。實(shí)驗(yàn)結(jié)果表明:在滿足噴嘴流量的要求下,平均霧化粒徑SMD約為20μm,液滴尺寸分布指數(shù)N大于2;SMD隨油壓差的變大而略有增大,隨氣液比ALR的增加而減小;隨著測(cè)點(diǎn)距噴嘴出口的距離變大,SMD增大;共振腔距離噴嘴出口15mm時(shí)霧化效果最好;噴霧角度隨著油壓差的增加而增大。
[Abstract]:In order to explore the feasibility of application of ultrasonic nozzle to pulse detonation engine, a prefilm rod shot ultrasonic nozzle was designed, and the atomization characteristics of the nozzle were studied by laser particle size meter and high speed camera. The flow characteristics, droplet average diameter SMD and atomization angle were obtained. The experimental results show that the average atomization diameter SMD is about 20 渭 m when the nozzle flow rate is satisfied. Droplet size distribution index N > 2; The SMD increases slightly with the increase of the oil pressure difference and decreases with the increase of the gas-liquid ratio ALR. The SMD increases with the increase of the distance between the measured points and the nozzle outlet. The atomization effect is the best when the cavity is 15mm away from the nozzle outlet. The spray angle increases with the increase of oil pressure difference.
【作者單位】: 南京航空航天大學(xué)能源與動(dòng)力學(xué)院;
【分類(lèi)號(hào)】:V231.2
【正文快照】: 1引言發(fā)展先進(jìn)的航空發(fā)動(dòng)機(jī)燃燒室技術(shù)需要依靠良好的霧化以及快速均一的摻混,燃油噴嘴作為其中一個(gè)關(guān)鍵部件,其霧化性能直接關(guān)系到燃燒室能否可靠點(diǎn)火和穩(wěn)定工作,滿足推力油耗率、污染物排放和工作壽命的要求[1~3]。超聲波燃油霧化是利用空氣射流在共振腔產(chǎn)生高頻率、高振幅
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1 張平余;;閥門(mén)流量特性試驗(yàn)研究[A];2008年航空試驗(yàn)測(cè)試技術(shù)峰會(huì)論文集[C];2008年
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