摘要
对旋转状态下的单相水及加热单相水至沸腾的两相流进行了对比实验.通过对热耗散、流型、流阻及传热的分析与计算,研究了动载对流体流动与传热的影响.结果表明:过载强烈影响两相流动(尤其是流阻)和热传递方式,增大了流体的流阻和热损失,并削弱了流体的得热能力.动载引起的冲击交混流改变了管壁温度的均匀性和变化规律,即随着过载的增大,在一定范围内,管壁底部温度降低,顶部温度升高.
An experimental investigation was performed comparatively and heat transfer characteristics of single-phase water flow and two-phase to obtain the flow pipe boiling water flow under dynamic toad in present work. By analyzing the effective heat, flow pattern, fluid resistance and heat transfer coefficient of the experimental data, the effects of dynamic load on the flow and heat transfer characteristics of single phase water and two-phase boiling water flow were investigated. The results show that the dynamic load significantly influences the flow characteristic and boiling heat transfer of the two-phase pipe flow. It will enhance the fluid resistance and heat dissipation toward the ambient environment, and also reduce the heat transfer capability of the two-phase boiling flow. The impact mixing flow caused by the dynamic load breaks the uniform and varying properties of the wall temperatures, so the greater the dynamic load, the lower the wall inner bottom temperature, and the higher the wall inner top temperature occurs in a certain extent
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2010年第1期28-34,共7页
Journal of Aerospace Power
基金
国家自然科学基金(50576035)
高等学校博士学科点专项科研基金(20040287017)
关键词
动载
汽水两相流
沸腾传热
传热特性
dynamic load
steam-water two-phase flow
boiling heat transfer
heat transfer characteristics