Eddy Current Minimizing Flow Plug Design
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Solution Overview
Problem
Existing flow conditioners, such as multi-hole orifice plates, often produce eddy currents downstream, leading to vibrations and noise, and require moving parts or power for flow measurement, which can cause equipment damage and inefficiencies.
Innovation Solution
A flow plug with an outer radial wall and inner surface featuring converging and diverging open flow channels, minimizing eddy currents by eliminating planar surfaces and optimizing channel lengths to reduce fluid disruption, compatible with existing fittings and measurement systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-hole orifice plates are used for flow conditioning, then flow measurement can be achieved, but eddy currents are produced downstream causing vibrations and noise
Solution Approach 1:
The flow plug employs curved flow channels instead of straight planar passages. The channels feature a smooth curved transition from inlet to outlet, eliminating sharp edges and planar surfaces that generate eddy currents. This curvature principle directly addresses the harmful eddy current generation while maintaining flow measurement capability through the curved path geometry.
Solution Approach 2:
The flow plug divides the fluid flow into multiple separate flow channels within the plug body. By segmenting the flow path into distinct curved channels, the design conditions the flow while distributing it through multiple paths, reducing the generation of large-scale eddy currents compared to single-hole orifice plates.
2Measurement precision
If orifice plates are used to condition flow, then flow measurement is enabled, but permanent pressure loss increases
Solution Approach 1:
The curved flow channels provide smooth transitions that reduce flow separation and turbulence. This curved geometry minimizes energy losses associated with sharp edges and abrupt direction changes, thereby reducing permanent pressure loss while still enabling flow measurement through the plug.
3Measurement precision
If conventional flow conditioners with planar surfaces are used, then flow can be measured, but vibrations and noise increase due to eddy currents
Solution Approach 1:
By replacing all planar surfaces with curved surfaces in the flow path, the invention eliminates the generation of eddy currents that cause vibrations and noise. The curved channels ensure smooth flow transitions without sharp edges, directly reducing the harmful vibrational and acoustic effects while maintaining measurement capability.
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 flow plug effectively minimizes downstream eddy currents, reducing vibrations and noise, while allowing for accurate flow measurement without moving parts or power requirements, maintaining compatibility with current systems.
Implementation Method 1
orifice plates can produce eddy currents in the downstream region of the flow. Such eddy currents can cause vibrations that generate noise and, in extreme cases, cause equipment damage.
Data Source
AI summary
An eddy-current-minimizing flow plug has open flow channels formed between the plug's inlet and outlet. Each open flow channel includes (i) a first portion that originates at the inlet face and converges to a location within the plug that is downstream of the inlet, and (ii) a second portion that originates within the plug and diverges to the outlet. The diverging second portion is approximately twice the length of the converging first portion. The plug is devoid of planar surface regions at its inlet and outlet, and in fluid flow planes of the plug that are perpendicular to the given direction of a fluid flowing therethrough.