超音速气雾化喷嘴中抽吸压力变化规律的研究  

Aspiration pressure varation at the tip of metal delivery tube in the supersonic atomization nozzle

作　　者：赵新明[1] 徐骏[1] 朱学新 张少明[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088 [2]北京康普锡威科技有限公司,北京100088

出　　处：《粉末冶金技术》2010年第1期21-25,共5页Powder Metallurgy Technology

基　　金：国家高技术研究发展计划项目资助(2009AA033901)

摘　　要：对超音速气雾化喷嘴中抽吸压力ΔP的变化进行了试验研究,重点考察了雾化气体压力P0、气流夹角α、导液管锥顶角β及突出长度h对抽吸压力的影响。试验结果表明,在(0.5～4.0MPa)雾化压力范围内,抽吸压力皆呈负压状态。但抽吸压力变化分三阶段:随着雾化压力的增加,雾化压力在0.5～1.5MPa范围内,抽吸压力减小;雾化压力在1.5～3.5MPa之间时,抽吸压力逐渐增大,并达到一个最大值;当雾化压力超过3.5MPa后,抽吸压力又逐渐降低。锥顶角越大,抽吸压力越大;而雾化压力升高到或大于3.23MPa时,随着突出长度的增加,抽吸压力逐渐减小。The aspiration pressure variation at the tip of metal delivery tube in the supersonic atomization nozzle during gas-only atomization performance had been investigated in this work. Effects of atomization gas pressure P0, jet included angle α, the apex angle β and the protrusion length h of metal delivery tube on aspiration pressure AP were measured. The results reveal that the aspiration pressure is subatmospheric under all operating pressures. A general trend is that with increasing atomization gas pressure, the value of aspiration pressure decreases in the range of 0. 5 - 1.5MPa, then increases in the range of from 1.5 - 3.5MPa, finally decreases again under higher gas pressure （P0 〉 3.5MPa）. The larger the apex angle of metal delivery tube, the greater the aspiration pressure. With the jet included angle α of the nozzle decreasing, the aspiration pressure increases. Only the atomization gas pressure reaches and above 3.23MPa, as the protrusion length increases, the aspiration pressure decreases.

关 键 词：气雾化 抽吸压力 喷嘴 导液管 

分 类 号：TU991.36[建筑科学—市政工程]