动力工程学报
動力工程學報
동력공정학보
JOURNAL OF POWER ENGINEERING
2012年
9期
693-697,732
,共6页
脱硫%喷嘴%两相流%雾化%气液质量比
脫硫%噴嘴%兩相流%霧化%氣液質量比
탈류%분취%량상류%무화%기액질량비
desulfurization%nozzle%two-phase flow%atomization%air-liquid mass ratio
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.
在一種內置拉法爾氣體噴管兩相流“液包氣”噴嘴的設計基礎上,搭建瞭多相霧化實驗檯,進行瞭噴嘴霧化性能實驗,研究瞭氣液質量比(訓)對噴嘴霧化顆粒粒徑分佈均勻性、索特爾平均霧化直徑、霧化角等性能指標的影響,推導齣“液包氣”噴嘴液氣壓力比和氣液質量比的經驗公式及適用範圍,得到瞭內置拉法爾噴管兩相流“液包氣”噴嘴氣液質量比的臨界點為0.057.結果錶明:液氣壓力比隨著硼的增大而減小;噹w=0.057時,液氣壓力比為0.92;氣體流量繫數與氣液質量比呈反比關繫;“液包氣”噴嘴單相霧化效果遠差于兩相時的霧化效果,且隨著噴嘴液相壓力的提高,霧化效果變好,但壓力對霧化效果的影響越來越弱.
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.