Arched Hub Flow Conditioner for Skewed Profile Correction
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Solution Overview
Problem
Existing flow conditioners struggle to achieve a high conditioning effect while minimizing pressure loss and construction size, and often fail to correct skewness in fluid flow profiles, leading to inaccurate measurements.
Innovation Solution
A rotationally symmetrical hub body fixed within a pipe with an arched outward onflow region, which enables radial pulse exchange and counteracts skewness, combined with a diffuser section and areal webs to stabilize the flow, resulting in a compact and efficient flow conditioner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional flow conditioners (plates, metal sheets, inner pipes) are used to condition disturbed flow profiles, then swirl can be counteracted, but skewness of the flow cannot be corrected and construction size remains large
Solution Approach 1:
The patent employs a hub body with an arched outward onflow region that is rotationally symmetrical with respect to the pipe axis. This curved, dome-like surface replaces conventional flat plates and linear components, enabling the flow to be smoothly redirected and conditioned. The rotational symmetry ensures uniform flow distribution while the arched geometry effectively counteracts both swirl and skewness components of disturbed flow profiles.
2Measurement precision
If flow conditioner components are enlarged to achieve high conditioning effect, then flow uniformity improves, but pressure loss increases
Solution Approach 1:
The arched outward onflow region with its dome-like curvature is specifically designed to guide flow smoothly over the hub body surface. This curved geometry reduces flow separation and turbulence compared to sharp-edged conventional components, thereby minimizing pressure loss while achieving effective flow conditioning with a compact hub body size.
3Ease of manufacture
If conventional flat plates with surfaces normal to flow direction are used, then simple construction is achieved, but radial pulse exchange is prevented and skewness cannot be counteracted
Solution Approach 1:
The rotationally symmetrical hub body with arched outward onflow region creates a three-dimensional curved surface that interacts with the flow in multiple directions simultaneously. This geometry enables radial pulse exchange and effective counteraction of skewness, which flat plates cannot achieve, while the rotational symmetry maintains manufacturing simplicity through a single unified component design.
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 produces a largely uniform flow profile with minimal pressure loss, reducing energy requirements and allowing for robust measurements with a flat characteristic curve, suitable for calibration with simple offset adjustments.
Implementation Method 1
the hub body of a flow conditioner in accordance with the invention enables a radial pulse exchange and can thereby also counteract a possible skewness of the flow
Implementation Method 2
The hub body can have a diffuser section in which the cross-sectional surface of the hub body decreases along the pipe axis in a direction facing downstream
Data Source
AI summary
A flow conditioner for conditioning a fluid flow comprises a pipe that has a pipe axis and that can be flowed through by a fluid in the direction of the pipe axis; and at least one hub body that is rotationally symmetrical with respect to an axis of symmetry and that is fixed in the pipe such that the axis of symmetry coincides with the pipe axis, wherein the hub body fixed in the pipe has an onflow region that is arched outwardly against the onflow direction.