CAJ | 학술논문

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.
대초음속기무화분취중추흡압력ΔP적변화진행료시험연구,중점고찰료무화기체압력P0、기류협각α、도액관추정각β급돌출장도h대추흡압력적영향.시험결과표명,재(0.5～4.0MPa)무화압력범위내,추흡압력개정부압상태.단추흡압력변화분삼계단:수착무화압력적증가,무화압력재0.5～1.5MPa범위내,추흡압력감소;무화압력재1.5～3.5MPa지간시,추흡압력축점증대,병체도일개최대치;당무화압력초과3.5MPa후,추흡압력우축점강저.추정각월대,추흡압력월대;이무화압력승고도혹대우3.23MPa시,수착돌출장도적증가,추흡압력축점감소.
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 ΔP 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.