scholarly journals An experimental investigation on the narrow annular-flow-induced vibration instability of a tube

2011 ◽  
Author(s):  
H. S. Kang ◽  
N. K. Muriethi ◽  
M. J. Pettigrew
Keyword(s):  
Experimental Investigation ◽  
Annular Flow ◽  
Flow Induced Vibration

An Experimental Investigation of the Dynamics of a Loosely Supported Tube Array

2017 ◽  
Author(s):  
Amro Elhelaly ◽  
Marwan Hassan ◽  
Atef Mohany ◽  
Soha Moussa
Keyword(s):  
Experimental Investigation ◽  
Impact Force ◽  
Cross Flow ◽  
Open Loop ◽  
Diameter Ratio ◽  
Force Level ◽  
Steam Generators ◽  
Flow Induced Vibration ◽  
System Integrity ◽  
Tube Bundles

The integrity of tube bundles is very important especially when dealing with high-risk applications such as nuclear steam generators. A major issue to system integrity is the flow-induced vibration (FIV). FIV is manifested through several mechanisms including the most severe mechanism; fluidelastic instability (FEI). Tube vibration can be constrained by using tube supports. However, clearances between the tube and their support are required to allow for thermal expansion and for other manufacturing considerations. The clearance between tubes may allow frequent impact and friction between tube and support. This in turn may cause fatigue and wear at support and potential for catastrophic tube failure. This study aims to investigate the dynamics of loosely supported tube array subjected to cross-flow. The work is performed experimentally in an open-loop wind tunnel to address this issue. A loosely-supported single flexible tube in both triangle and square arrays subjected to cross-flow with a pitch-to-diameter ratio of 1.5 and 1.733, respectively were considered. The effect of the flow approach angle, as well as the support clearance on the tube response, are investigated. In addition, the parameters that affect tube wear such as impact force level are presented.

Experimental Investigation of Horizontal Gas-Liquid Stratified and Annular Flow Using Wire Mesh Sensor

2013 ◽  
Author(s):  
R. E. Vieira ◽  
N. R. Kesana ◽  
C. F. Torres ◽  
B. S. McLaury ◽  
S. A. Shirazi ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Annular Flow ◽  
Wire Mesh

Experimental investigation of the effect of 90° standard elbow on horizontal gas–liquid stratified and annular flow characteristics using dual wire-mesh sensors

2014 ◽  
Vol 59 ◽  
pp. 72-87 ◽  
Author(s):  
Ronald E. Vieira ◽  
Netaji R. Kesana ◽  
Brenton S. McLaury ◽  
Siamack A. Shirazi ◽  
Carlos F. Torres ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Annular Flow ◽  
Flow Characteristics ◽  
Wire Mesh

J052034 Study of Stability on Annular Flow-induced Vibration Based on Probabilistic Theory

2013 ◽  
Vol 2013 (0) ◽  
pp. _J052034-1-_J052034-5
Author(s):  
Hirokazu ISONO ◽  
Atsuhiko SHINTANI ◽  
Tomohiro ITO ◽  
Chihiro NAKAGAWA
Keyword(s):  
Annular Flow ◽  
Probabilistic Theory ◽  
Flow Induced Vibration
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