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RISPitch and Pattern Effects on Streamwise Fluidelastic Instability in Tube Arrays
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fluidelastic instability (FEI) is well known to be a critical flow-induced vibration concern for the integrity of the tubes in nuclear steam generators. Traditionally, this has been assumed to occur in the direction ...
Fluidelastic Instability Modeling of Loosely Supported Multispan U Tubes in Nuclear Steam Generators
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Steam generators in nuclear power plants have experienced tube failures caused by flowinduced vibrations. Two excitation mechanisms are responsible for such failures; random turbulence excitation and fluidelastic instability. ...
Evaluation of the Integrity of Steam Generator Tubes Subjected to Flow Induced Vibrations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flowinduced vibrations (FIV) continue to affect the operations of nuclear power plant components such as heat exchanger tube bundles. The negative effect of FIV is in the form of tube fatigue, cracking, and fretting wear ...
The Flow-Structure Couplings of Fluidelastic Instability and the Effect of Frequency Detuning in Triangular Tube Bundles Subjected to a Two-Phase Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For decades, fluidelastic instability (FEI) has been known to cause dramatic mechanical failures in tube bundles. Therefore, it has been extensively studied to mitigate its catastrophic consequences. Most of these studies ...
Evaluating the Performance Degradation of Centrifugal Pumps Using the Principal Component Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Centrifugal pumps are used in a variety of engineering applications, such as power production, heating, cooling, and water distribution systems. Although centrifugal pumps are considered to be highly reliable hydraulic ...
Experimental Study on Damping Acoustic Pressure Pulsations in Pipeline Systems Using Helmholtz Resonators
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Acoustic pressure pulsations can be problematic in industrial pipelines, especially when the excitation frequency matches an acoustic resonance frequency of the pipeline. The objective of this paper is to investigate the ...
Modeling of Streamwise and Transverse Fluidelastic Instability in Tube Arrays
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The development of a theoretical model for fluidelastic instability (FEI) in tube arrays is presented. Based on the simple model of Lever and Weaver, it considers a group of seven tubes which move in both the streamwise ...
The Effect of Flat Bar Supports on Streamwise Fluidelastic Instability in Heat Exchanger Tube Arrays
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flowinduced vibration is an important criterion for the design of heat exchangers in nuclear, fossil, and chemical plants. Of the several known vibration excitation mechanisms, fluidelastic instability (FEI) is the most ...
Special Issue: Current Trends for Pressure Vessels and Piping Technology
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: There have been significant innovations in Pressure Vessels and Piping (PVP) technology over the last decade. In Europe and North America, inspection and evaluation methods using risk-based and performance-based ideas have ...
Numerical Prediction of the Streamwise Fluidelastic Instability
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent experimental investigations have shown that tube arrays can become unstable in the streamwise direction. This is contrary to the long-held notion that fluidelastic instability is only a concern in the direction ...