两相流中密度波现象的研究及进展

密度波（又称连续波、空隙度波、运动学波）是两相流中的特殊现象，本文评述两相流密度波理论的主要研究进展，这些理论不仅研究了线性密度波和非线性密度波的特性，还研究了气液两相流的流型转变与密度波的关系，流化床中气塞的形成和床层的塌陷现象与密度波的关系等．同时介绍试验和理论研究在密度波的波速、频率、稳定性和色散性等方面取得的主要结论．最后指出密度波的理论和试验研究尚需进一步解决的问题．

PROGRESS IN THE RESEARCHOF DENSITY WAVE PHENOMENAOF TWO PHASE FLOW

Density wave (continuity wave, voidage wave, kinematic wave) is a special phenomenon of two phase flow. The main developments of density wave theories were reviewed in this paper. These theories consider not only the characteristics of linear and non linear waves, but also the flow pattern transition, the formation of slug and the collapse of fluidized bed. The principal conclusions obtained from experiments and theories for propagation velocity, frequency, stability and dispersivity were discussed. The problems for future research were pointed out.