Axial development of gas-liquid flow regime maps in a vertical 5 × 5 rod bundle with prototypic spacer grids

2018 ◽  
Vol 339 ◽  
pp. 1-10 ◽  
Author(s):  
Hang Liu ◽  
Liang-ming Pan ◽  
Takashi Hibiki ◽  
Wen-xiong Zhou ◽  
Quan-yao Ren ◽  
...  
Keyword(s):  
Flow Regime ◽  
Liquid Flow ◽  
Spacer Grids ◽  
Rod Bundle ◽  
Gas Liquid Flow ◽  
Axial Development ◽  
Flow Regime Maps

scholarly journals Identification of gas-liquid flow regimes using a non-intrusive Doppler ultrasonic sensor and virtual flow regime maps

2019 ◽  
Vol 68 ◽  
pp. 101568 ◽  
Author(s):  
Somtochukwu Godfrey Nnabuife ◽  
Karl Ezra S. Pilario ◽  
Liyun Lao ◽  
Yi Cao ◽  
Mahmood Shafiee
Keyword(s):  
Flow Regime ◽  
Liquid Flow ◽  
Flow Regimes ◽  
Ultrasonic Sensor ◽  
Gas Liquid Flow ◽  
Flow Regime Maps

Experimental Study on Flow Patterns and Pressure Drop of Decaying Swirling Gas-Liquid Flow in a Vertical Pipe

2020 ◽  
Author(s):  
Jiarong Zhang ◽  
Li Liu ◽  
Shuai Liu ◽  
Hanyang Gu
Keyword(s):  
Pressure Drop ◽  
Flow Regime ◽  
Liquid Flow ◽  
High Speed ◽  
Phase Distribution ◽  
Swirling Flow ◽  
Tangential Velocity ◽  
High Speed Camera ◽  
Vertical Pipe ◽  
Gas Liquid Flow

Abstract Vertical swirling gas-liquid flow is a kind of complex two-phase flow containing a nonzero tangential velocity component in engineering applications. The accurate flow regime characterization, phase distribution information and pressure drop data about vertical swirling flow are the basis for the optimization of steam generator (SG), which can greatly reduce the cost and improve the safety of nuclear plants. To get these key parameters of swirling vertical flow, we have made a comprehensive visualization experiment in a vertical pipe with 30mm diameter and 5m length by high-speed camera. The experimental pipe is separated into swirling part and non-swirling part. We have set three observation section with different vertical heights in the swirling part. Changing the flow rate of water and gas, different swirling flow pattern photos can be captured by high-speed camera. Based on the photos of different positions and image-processing MATLAB code, we can get three flow regime maps and figure out the decaying law of swirling gas-liquid flow. The pressure drop can be recorded by rotameter at each position. The decaying law of pressrure drop can be concluded from it. These data can be a guide for designing gas-liquid separator in SG to improve the efficiency of nuclear plant.

scholarly journals Flow regime mapping in gas-liquid flow in micro-channels

2016 ◽  
Vol 3 (6) ◽  
Author(s):  
K. Ashok Kumar ◽  
S. Lokesh ◽  
K.T.V. Nagendra ◽  
K.V. Ramesh
Keyword(s):  
Flow Regime ◽  
Liquid Flow ◽  
Micro Channels ◽  
Gas Liquid Flow

Flow regime transition for cocurrent gas–liquid flow in micro-channels

2012 ◽  
Vol 69 (1) ◽  
pp. 578-586 ◽  
Author(s):  
Xi Wang ◽  
Yumei Yong ◽  
Ping Fan ◽  
Gengzhi Yu ◽  
Chao Yang ◽  
...  
Keyword(s):  
Flow Regime ◽  
Liquid Flow ◽  
Regime Transition ◽  
Flow Regime Transition ◽  
Micro Channels ◽  
Gas Liquid Flow
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