低质量流速优化内螺纹管摩擦阻力特性实验研究  

Experimental investigation on frictional resistance characteristics of optimized rifled tube at low mass flux

作　　者：潘杰[1] 杨冬[2] 肖荣鸽[1] 

机构地区：[1]西安石油大学石油工程学院,西安710065 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《高技术通讯》2014年第4期429-433,共5页Chinese High Technology Letters

基　　金：国家自然科学基金(51304160);国家科技支撑计划(2006BAA03B02-03);西安石油大学博士科研启动基金(2011BS029)资助项目

摘　　要：在绝热及加热条件下,对低质量流速四头优化内螺纹管的摩擦压降进行了实验研究,探讨了其单相及两相摩擦阻力特性,分析了压力、质量流速和蒸汽干度变化对两相摩擦压降倍率的影响,并给出了能用于工程实际的实验关联式。实验结果表明:(1)内螺纹管的单相摩擦系数在低雷诺数区域随雷诺数的增大而显著减小,但在高雷诺数区域几乎保持不变;(2)内螺纹管的两相摩擦倍率随着蒸汽干度的增大先增大、随后增幅减小甚至略有下降,随着压力的增大而迅速减小,但受质量流速的影响较小。(3)受热管的单相摩擦系数小于绝热管,但两相摩擦倍率大于绝热管。An experiment was conducted at heat-insulated and heating conditions to investigate the frictional pressure drops of 4-head optimized rifled tubes with low mass flux.The single-phase and two-phase frictional resistance characteristics of rifled tubes were discussed,the effects of pressure,mass flux and vapor quality on the two-phase frictional multiplier were analyzed,and the corresponding empirical correlations available for utility boiler design were also presented.The experimental results imply the following conclusions：（1） At the low Reynolds number region,the single-phase frictional coefficient of rifled tubes decreases gradually with the increasing of the Reynolds number,whereas it hardly varies with the Reynolds number at a high Reynolds number region.（2） With the increase of vapor quality,the two-phase frictional multiplier of rifled tubes rises rapidly,and then rises slowly,even begins to decrease; besides,it deceases obviously with the increasing of pressure,and is not affected by the change of mass flux.（3） The single-phase frictional coefficient of heating rifled tubes is less than that of heat-insulated rifled tubes,but the two-phase frictional multiplier is greater than that of heat-insulated rifled tubes.

关 键 词：低质量流速 优化内螺纹管 摩擦特性 单相摩擦系数 两相摩擦倍率 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]