摘要
采用光纤探针测量方法,对倾斜圆管中气液两相流动的空泡径向分布特性进行了实验研究,并对其形成原因进行了分析.实验选用有机玻璃圆管内径为50mm,竖直倾斜角度为5°,15°和30°,液相折算速度为0.071-0.284m/s,气相折算速度的范围为0-0.05m/s.结果表明：随着倾斜角度的增加,空泡份额径向分布逐渐由＂核峰＂、＂壁峰＂分布向单一＂壁峰＂分布转变;通过分析气泡受到的横向升力、浮力径向分量和壁面力,发现升力、浮力、壁面力的共同作用,使气泡在圆管径向位置15mm与22mm之间处聚集,从而造成空泡份额沿径向呈＂壁峰＂型分布.
Void fraction radial distribution of gas-liquid two phase flow in an inclined circular tube was investigated experimentally by using an optical fiber probe,and the reason for its formation was also illustrated.Experiments were conducted in an inclined circular tube made of perspex with inner diameter of 50mm,and inclination angles of 5°,15°and 30°.The specific liquid velocity was 0.071-0.284m/s and the specific gas velocity covered the range of 0-0.5m/s.The results show that,with increase of the inclined angle,the radial distribution of void fraction gradually shifts from the‘core peak＇and‘wall peak＇to the single‘wall peak＇distribution.The analysis of the buoyancy component in radius and lateral lift forces as well as wall force acting on bubbles shows that the combined effects of these forces lead to the bubbles gathering around the radial position between 15mm and 22mm,resulting in the‘wall peak＇distribution of the void fraction.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2014年第6期1346-1351,共6页
Journal of Aerospace Power
基金
国家自然科学基金(51076034
51376052)
中央高校基本科研专项资助(HEUCFZ1122)
黑龙江省博士后启动基金
关键词
两相流
光纤探针
空泡份额
升力
壁面力
two-phase flow
fiber probe
void fraction
lift force
wall force
