Cylindrical Flow Channels With Oblique Patterns for Cavitation Control
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Solution Overview
Problem
Conventional fluid flow control devices fail to adequately address issues such as cavitation, vibration, and pressure and velocity fluctuations in fluids, leading to undesirable characteristics like erosion, noise, and turbulence.
Innovation Solution
The design incorporates a cylindrical body with longitudinally extending channels at oblique angles, forming patterns such as diamond or offset brick patterns, which intersect and vary in depth and width, to control fluid flow and reduce cavitation, turbulence, and shear forces, often used in concentric assemblies within valves or pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional fluid flow control devices are used to reduce fluid pressure and energy, then fluid pressure and energy are reduced, but cavitation, vibration, turbulence, erosion, noise, and pressure/velocity fluctuations occur
Solution Approach 1:
The fluid flow path is segmented into multiple sections with progressively changing cross-sectional areas. The device divides the single large pressure drop into multiple smaller pressure drops across different segments, reducing turbulent fluctuations and cavitation while still achieving the overall pressure reduction goal
Solution Approach 2:
Different sections of the fluid flow path have locally optimized cross-sectional areas. The cross-sectional area increases progressively from the inlet toward the outlet in specific regions, creating localized control zones that manage pressure and velocity changes to minimize harmful effects like cavitation and turbulence
2Speed
If tortuous fluid flow paths are used to reduce fluid velocity and pressure, then fluid pressure and energy are dissipated, but friction losses, rapid direction changes, and expansion/contraction chambers cause turbulence and vibration
Solution Approach 1:
The device uses smoothly curved transitions instead of sharp angles or abrupt direction changes. The flow path incorporates gradual curves that guide fluid smoothly from one direction to another, reducing turbulent eddies and vibration while maintaining effective velocity reduction
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
This configuration effectively reduces fluid pressure and energy, minimizing cavitation, vibration, and turbulence, while improving flow characteristics and reducing noise, making it suitable for various industrial applications including control valves and pipe systems.
Implementation Method 1
The fluid pressure and energy of the fluid is partially dissipated along such paths as a result of losses caused by friction between walls of the path
Implementation Method 2
As the fluid flows through the fluid pathways, the fluid flow may be turbulent
Implementation Method 3
as the fluid travels through the tortuous fluid flow paths, the overall cross-sectional area of the fluid flow path may increase to provide a decrease in the velocity of the fluid within the flow path
Implementation Method 4
Pressurized fluids contain stored mechanical potential energy. A fluid flow control device dissipates this energy by reducing the pressure and velocity of the fluid... These pressure and velocity fluctuations are generally accompanied by other problems such as erosion, noise, vibration, and cavitation
Data Source
AI summary
Fluid flow control devices comprise a cylindrical body extending along a longitudinal axis and having a sidewall. The cylindrical body has a first channel extending longitudinally along the sidewall and a second channel extending longitudinally along the sidewall. At least a portion of one of the at least one first channel and the at least one second channel extends longitudinally at an oblique angle with respect to the longitudinal axis to form a pattern of channels for improving the flow characteristics of a fluid through the channels.