CAJ | 학술논문

在一种内置拉法尔气体喷管两相流“液包气”喷嘴的设计基础上，搭建了多相雾化实验台，进行了喷嘴雾化性能实验，研究了气液质量比（训）对喷嘴雾化颗粒粒径分布均匀性、索特尔平均雾化直径、雾化角等性能指标的影响，推导出“液包气”喷嘴液气压力比和气液质量比的经验公式及适用范围，得到了内置拉法尔喷管两相流“液包气”喷嘴气液质量比的临界点为0．057．结果表明：液气压力比随着硼的增大而减小；当w=0．057时，液气压力比为0．92；气体流量系数与气液质量比呈反比关系；“液包气”喷嘴单相雾化效果远差于两相时的雾化效果，且随着喷嘴液相压力的提高，雾化效果变好，但压力对雾化效果的影响越来越弱．
재일충내치랍법이기체분관량상류“액포기”분취적설계기출상，탑건료다상무화실험태，진행료분취무화성능실험，연구료기액질량비（훈）대분취무화과립립경분포균균성、색특이평균무화직경、무화각등성능지표적영향，추도출“액포기”분취액기압력비화기액질량비적경험공식급괄용범위，득도료내치랍법이분관량상류“액포기”분취기액질량비적림계점위0．057．결과표명：액기압력비수착붕적증대이감소；당w=0．057시，액기압력비위0．92；기체류량계수여기액질량비정반비관계；“액포기”분취단상무화효과원차우량상시적무화효과，차수착분취액상압력적제고，무화효과변호，단압력대무화효과적영향월래월약．
On the design basis of a gas-outside liquid-inside atomizer with built-in Rafael air nozzle, an experimental setup has been built up to study the liquid atomization in multi-phase flows, analyze the influence of gas-liquid mass ratio on the atomized particle size distribution, Sauter mean diameter and spray cone angle, etc. , and therefore deduce the formula between the liquid-air pressure ratio and the air-liquid mass ratio, with which the critical air-liquid mass ratio is found to be 0. 057. Results show that the liquid- air pressure ratio increases with reducing air-liquid mass ratio; when the air-liquid mass ratio is 0. 057, the corresponding liquid-air pressure ratio is 0.92; the air flow coefficient has an inverse relationship with the air-liquid mass ratio. The atomization effect under single-phase condition is far below the two-phase condi- tion, which increases with rising liquid pressure; however the enhancement of liquid pressure weakens gradually on the atomization performance.