Quantitative observation of co-current stratified two-phase flow in a horizontal rectangular channel

Nuclear Engineering and Technology

卷:47

Dong-Jin Euh¹  Chul-Hwa Song¹  Seungtae Lee¹  Seok Kim² 

[1] Department of Advanced Nuclear System Engineering, Korea University of Science & Technology (KUST), Gajungro 217, Yuseong-Gu, Daejeon, 305-350, Republic of Korea;

[2] Thermal Hydraulics Safety Research Division, Korea Atomic Energy Research Institute (KAERI), Daedeok-Daero 989-111, Yuseong-Gu, Daejeon, 305-353, Republic of Korea;

关键词: Direct-Contact Condensation;    Flow Visualization;    Horizontal Stratified Flow;    Laser Induced Fluorescence;    Particle Image Velocimetry;    Ultrasonic;   

DOI  :  10.1016/j.net.2014.11.007

来源: DOAJ

【 摘 要 】

The main objective of this study is to investigate experimentally the two-phase flow characteristics in terms of the direct contact condensation of a steam–water stratified flow in a horizontal rectangular channel.Experiments were performed for both air–water and steam–water flows with a co-current flow configuration. This work presents the local temperature and velocity distributions in a water layer as well as the interfacial characteristics of both condensing and noncondensing fluid flows.The gas superficial velocity varied from 1.2 m/s to 2.0 m/s for air and from 1.2 m/s to 2.8 m/s for steam under a fixed inlet water superficial velocity of 0.025 m/s. Some advanced measurement methods have been applied to measure the local characteristics of the water layer thickness, temperature, and velocity fields in a horizontal stratified flow. The instantaneous velocity and temperature fields inside the water layer were measured using laser-induced fluorescence and particle image velocimetry, respectively. In addition, the water layer thickness was measured through an ultrasonic method.

【 授权许可】

Unknown