Bent Pipe Inner Face Circular Arc Recess Pressure Drop
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Solution Overview
Problem
The existing bent pipe structures exhibit a sharp corner configuration at the bend, leading to increased pressure drop in fluid flow due to a lack of a circular arc shape at the inner circumferential face, which results in inefficiencies in fluid flow.
Innovation Solution
A bent pipe structure with a cross-sectional area enlargement portion featuring a circular arc shape at the inner circumferential face, which includes a pair of side face portions and a bottom face portion, configured to enlarge the flow path area, thereby reducing pressure drop by forming a recess that protrudes towards the outer circumferential side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sharp corner configuration is used at the bend inner circumferential face, then the manufacturing simplicity is improved, but the pressure drop increases due to poor fluid flow characteristics
Solution Approach 1:
The patent applies curvature by forming a circular arc-shaped recess at the inner circumferential face of the bend, replacing the sharp corner configuration. This curved geometry smooths the fluid flow path, reduces turbulence, and decreases pressure drop while maintaining manufacturing feasibility through standard molding techniques.
2Loss of energy
If a circular arc shape is formed at the inner circumferential face to reduce pressure drop, then the fluid flow efficiency is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by forming the circular arc-shaped recess only at the specific location of the inner circumferential face where fluid flow issues occur, rather than redesigning the entire pipe structure. This localized modification achieves flow optimization with minimal impact on overall manufacturing complexity.
3Loss of energy
If the cross-sectional area is enlarged at the bend, then the pressure drop is reduced, but the pipe wall thickness varies more significantly
Solution Approach 1:
The patent applies partial action by forming the circular arc-shaped recess to a specific depth that enlarges the cross-sectional area sufficiently to reduce pressure drop, while controlling the recess depth to maintain acceptable wall thickness uniformity. The recess dimensions are optimized to achieve the necessary flow improvement without excessive material removal.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A curved portion (14A) at an inner circumferential face (15) on a bend direction inside of a bend (14) has a circular arc shape. By configuring the curved portion with a circular arc shape, a recess (16), serving as an example of a cross-sectional area enlargement portion that enlarges the cross-sectional area of a flow path of a pipe body (12) running along a direction of an axial line 13, is formed in the inner circumferential face (15) on the bend direction inside of the bend (14).