Cylindrical Flow Channels With Oblique Paths for Cavitation Control
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Solution Overview
Problem
Conventional fluid flow control devices fail to adequately manage pressure and velocity fluctuations in fluids, leading to issues like cavitation, vibration, and noise, which are undesirable in industrial applications.
Innovation Solution
The design incorporates a cylindrical body with longitudinally extending channels at oblique angles, forming patterns such as diamond or offset brick configurations, to control cavitation and improve fluid flow characteristics, including the use of concentric cylindrical bodies and varying channel depths and widths to reduce turbulence and shear.
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 velocity are reduced, but pressure and velocity fluctuations occur causing cavitation, vibration, and noise
Solution Approach 1:
The fluid flow path is divided into multiple segmented channels within the cylindrical body. These channels include straight sections, curved sections, and expansion/contraction sections that sequentially process the fluid flow. The segmentation allows controlled pressure reduction while minimizing harmful fluctuations through distributed flow management across multiple channel sections.
Solution Approach 2:
The cylindrical body and its channels incorporate curved geometries instead of sharp angles. The curved channels guide fluid flow smoothly through the device, reducing turbulence and pressure fluctuations. The circular cross-section of the cylindrical body and the curved transitions between channel sections help maintain laminar flow and minimize cavitation and vibration.
2Loss of energy
If tortuous fluid flow paths are used to dissipate fluid energy, then fluid pressure and energy are reduced, but friction losses and flow direction changes increase
Solution Approach 1:
Energy dissipation is achieved through segmented channel sections rather than a single tortuous path. The fluid passes through multiple discrete sections including straight channels, curved channels, and expansion/contraction chambers in sequence. This segmentation controls the rate of energy dissipation and reduces unnecessary friction losses by optimizing each section's function.
Solution Approach 2:
The channel geometry parameters are varied along the flow path to optimize energy dissipation. Channel width, depth, and curvature radius are changed at specific locations to create expansion and contraction sections that dissipate energy efficiently while minimizing friction losses. The parameters are adjusted to balance energy reduction with power loss minimization.
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 reduces cavitation, turbulence, and fluid velocity, thereby minimizing undesirable effects like erosion and noise, while providing improved control over fluid flow characteristics.
Implementation Method 1
a device may be employed to divide the flow through the device into a plurality of separate streams configured as a plurality of tortuous fluid flow paths within the device. As fluid passes through the tortuous fluid flow paths, the fluid changes direction many times.
Implementation Method 2
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, rapid changes in fluid direction and expansion or contraction chambers.
Implementation Method 3
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. The fluid pressure and energy of the fluid is partially dissipated along such paths
Implementation Method 4
As the fluid flows through the fluid pathways, the fluid flow may be turbulent. Turbulent fluid has associated pressure and velocity fluctuations that act upon the structural elements of the pipes and fluid control devices in which the fluid is flowing.
Implementation Method 5
The present disclosure describes embodiments of flow control devices that include fluid paths configured to better control cavitation, vibration, and other problems associated with fluid flow control.
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.