Helical Inlet Path for Stable Flow Sensor Profiles
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Solution Overview
Problem
Flow sensors, particularly thermal flow sensors, exhibit significant inlet dependence, leading to inaccuracies in flow rate measurement due to varying inlet conditions such as flow direction and velocity.
Innovation Solution
A manipulation path is designed to stabilize the flow profile by creating secondary flows through a curved helical section, reducing inlet dependence and enhancing the dynamic range of the flow sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long inlet path is used to allow the flow profile to fully develop, then the inlet dependence of the flow sensor is reduced, but the space requirement increases significantly
Solution Approach 1:
The inlet path is designed with a helical curvature instead of a straight configuration. This curved geometry generates secondary flows that promote flow profile development and reduce inlet dependence while occupying significantly less space than a straight path would require
2Stability of the object's composition
If dents are added to the inlet tube walls to create turbulent flow, then the flow profile is stabilized, but the signal noise increases greatly
Solution Approach 1:
The helical curvature of the inlet path generates secondary flows that stabilize the flow profile without creating the turbulent disruptions caused by dents. This curved geometry achieves flow stabilization while maintaining signal quality by avoiding abrupt geometric discontinuities
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 manipulation path significantly reduces inlet dependence, increases the laminar flow region, attenuates external noise, and provides a space-saving solution compared to conventional methods.
Implementation Method 1
the manipulation section 130 is designed such that secondary flows are formed in the measuring medium as a result of the measuring medium flowing through the section
Data Source
AI summary
A manipulation path for monitoring the flow profile at the inlet of a flow sensor, the manipulation path designed to conduct a fluid measuring medium, includes a first end region and a second end region, between which a manipulation section is located that is designed such that secondary flows are formed in the measuring medium as a result of the measuring medium flowing through the manipulation section. Two different variants of a system, each including a flow sensor and the manipulation path according to the present disclosure, are disclosed.