Non-Circular Fluid Valve Passageways to Reduce Flow Separation
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Solution Overview
Problem
Conventional fluid valves experience flow separation issues due to sharp profiles in their passageways, leading to reduced flow area efficiency, increased pressure loss, noise, and vibration, which negatively impact their performance.
Innovation Solution
The design incorporates a fluid passageway with a non-circular profile, featuring a bean-like shape that provides a smooth transition between circular and non-circular sections, reducing boundary layer separation by inducing cross-flow and minimizing adverse pressure gradients, thereby enhancing flow efficiency and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fluid valves with circular passageways are used, then manufacturing is simple, but flow separation occurs leading to reduced flow efficiency and increased pressure loss
Solution Approach 1:
The patent applies asymmetry by transitioning from a conventional circular passageway to a non-circular passageway with an asymmetric cross-sectional shape. This asymmetric geometry is specifically designed to eliminate flow separation by creating a smooth transition that prevents adverse pressure gradients, thereby improving flow efficiency and reducing pressure loss while maintaining manufacturing feasibility.
Solution Approach 2:
The patent employs curvature principles by designing a passageway with a non-circular cross-section that features smooth, continuous curved surfaces. This curved geometry eliminates sharp corners and abrupt transitions that cause flow separation, allowing fluid to flow smoothly through the passageway and reducing energy loss while maintaining structural integrity.
2Productivity
If non-circular passageway is used, then flow efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the passageway from a standard circular cross-section to a non-circular cross-section with specific dimensional ratios and curvature radii. These parameter changes are optimized to achieve smooth flow transitions while remaining compatible with conventional manufacturing processes, thus improving flow efficiency without excessively increasing manufacturing complexity.
3Object-affected harmful factors
If smooth transition is implemented to reduce boundary layer separation, then noise and vibration decrease, but structural strength may be compromised
Solution Approach 1:
The patent uses curved surfaces and smooth transitions in the non-circular passageway design to eliminate sharp corners that generate noise and vibration through flow separation. The curved geometry distributes stress more evenly throughout the structure, maintaining structural strength while reducing harmful acoustic and vibrational effects.
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 design improves flow efficiency, reduces noise and vibration, and increases structural strength by preventing boundary layer separation and allowing for a shorter face-to-face transition without compromising structural integrity.
Implementation Method 1
reducing boundary layer separation by inducing cross-flow
Implementation Method 2
inducing cross-flow
Implementation Method 3
minimizing adverse pressure gradients
Data Source
AI summary
Example fluid valves having non-circular flow passageways are disclosed. An example fluid valve includes a body defining a fluid passageway between an inlet and an outlet, at least a portion of the fluid passageway between the inlet and the outlet has a generally non-circular cross-sectional shape when taken along a plane transverse to a direction of fluid flow, the cross-sectional shape includes a curved central axis, with outwardly curved end walls and curved lateral walls joining the curved end walls.