Side Branch Piping Plate Layout for Flow-Induced Vibration
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Solution Overview
Problem
Flow-induced vibrations in side branch pipelines of piping systems, particularly in 'dead leg' configurations, lead to fatigue failures due to stress cycling, and existing solutions often require significant modifications or are impractical for large diameter applications.
Innovation Solution
A piping system with a side branch pipeline equipped with a perforated plate having a downstream half with less open area than the upstream half, featuring a protrusion on the side facing away from the junction, which reduces flow-induced vibrations by de-tuning the flow-excitation and acoustic resonant frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional vibration suppression approaches are implemented, then flow-induced vibrations are reduced, but piping layout requires significant modifications
Solution Approach 1:
A perforated plate is introduced as an intermediary component within the side branch pipeline to suppress flow-induced vibrations. The plate with strategically designed perforations acts as a mediator that disrupts acoustic resonance without requiring external modifications to the piping layout, thereby resolving the contradiction between vibration reduction and layout simplicity
Solution Approach 2:
The perforated plate changes the acoustic parameters of the side branch pipeline by creating specific flow patterns through the perforations. By adjusting perforation size, quantity, and distribution, the acoustic resonance frequency is modified to detune from the flow excitation frequency, effectively reducing vibrations while maintaining the original piping layout
2Object-affected harmful factors
If vibration suppression measures are added, then flow-induced vibrations are mitigated, but device complexity increases
Solution Approach 1:
The perforated plate divides the side branch pipeline into distinct acoustic zones, segmenting the flow path to disrupt standing wave formation. This segmentation approach effectively reduces vibrations while adding only a single component (the perforated plate) rather than multiple complex vibration suppression devices
Solution Approach 2:
The perforated plate functions as a porous structure that allows controlled flow passage while generating beneficial acoustic effects. The porous design with multiple perforations creates turbulence and disrupts acoustic resonance, achieving vibration suppression with a simple single-component solution rather than complex multi-component systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively mitigates vibrations in side branch pipelines without requiring significant layout modifications, is suitable for large diameter piping, and maintains low likelihood of perforation plugging, ensuring safe operation and reduced production restrictions.
Implementation Method 1
flow-induced vibrations of side branch pipelines may occur due to flow-excited acoustic resonance
Implementation Method 2
flow-induced vibrations in side branch pipelines may occur due to flow-excited acoustic resonance
Data Source
AI summary
The present invention provides a piping system (1) at least comprising a main pipeline (2) and a side branch pipeline (3), wherein the side branch pipeline (3) meets the main pipeline (2) at a junction (4), wherein the side branch pipeline (3) is provided with a perforated plate (5) having a plurality of perforations (6), wherein the perforated plate (5) has a downstream half (5B) and an upstream half (5A) (relative to the flow direction in the main pipeline (2)), wherein the downstream half (5B) has less open area than the upstream half (5A), and wherein the perforated plate (5) is provided with a protrusion (8), at the side of the perforated plate (5) facing away from the junction (4).