摘要
从两相流体的音速特点出发 ,研究两相超音速流动 ,分析超音速流动导致的激波状况 ,并利用两相激波加速凝结和增压的特点 ,设计了增压换热器。两相流的音速受其压缩性的影响而呈现出与单相流不同的特点 ,其较小的音速值使得两相超音速流动更易实现。两相流激波与波前马赫数密切相关 ,波后汽相凝结、压力升高 ,利用该特点设计的汽水直接接触式换热器 。
On the basis of the specific features of two-phase fluid sonic speed a study was conducted of two-phase supersonic flows followed by an analysis of the shock waves triggered by the supersonic flows. Moreover, by the use of the features of two-phase shock-wave accelerating condensation and pressure rise designed is a supercharged heat exchanger. The sonic speed of two-phase flows under the influence of its compressibility presents some features different from those of single-phase flows. Their relatively low sonic speed makes it easier to realize two-phase supersonic flows. The two-phase flow shock waves are closely related to wave-front Mach number. Wave-rear vapor condensation results in a pressure rise. A steam-water direct-contact heat exchangers designed by exploiting the above-mentioned feature is characterized by a high-efficiency heat exchange and pressure charging.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2002年第4期332-335,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家 973计划基金资助项目 (G2 0 0 0 2 6 30 5 )
关键词
汽液两相流
超音速
激波
增压换热器
vapor-liquid two-phase flow, supersonic flow, shock wave, supercharged heat exchanger
