Fluidic Oscillator Filter Placement for Pressure Loss Reduction
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Solution Overview
Problem
Fluidic components that produce moving fluid jets are prone to contamination by particles or foreign objects, leading to functional deterioration and increased pressure loss due to the use of external or internal filter elements, which can become clogged and impair the fluid stream's ability to exit as a moving jet.
Innovation Solution
A fluidic component design featuring a filter element placed between the means for targeted flow direction change and the flow chamber, allowing only a secondary flow to pass through the filter, thereby preventing particle accumulation in the flow direction mechanism and maintaining the fluid stream's functionality while minimizing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filter elements are arranged upstream of or at the inlet opening of the fluidic component, then particle filtration is improved, but pressure loss increases and device complexity increases
Solution Approach 1:
The patent introduces a recirculation channel as an intermediary flow path that allows a portion of the main flow to bypass the filter element. This mediator flow path enables particles to be removed from the main stream without forcing all fluid through the filter, thereby reducing pressure loss while maintaining filtration effectiveness.
Solution Approach 2:
The patent segments the main flow into two paths: a filtered path through the filter element and a recirculation path that bypasses the filter. This segmentation allows only the necessary portion of flow to pass through the filter, reducing overall pressure loss while maintaining particle removal capability.
2Reliability
If filter elements are arranged upstream of or at the inlet opening of the fluidic component, then particle filtration is improved, but device complexity increases
Solution Approach 1:
The patent merges the filter element integration with the existing flow chamber structure. The filter is positioned at the inlet opening and integrated into the flow chamber design, combining filtration functionality with the main fluidic component structure rather than being a separate upstream element.
Solution Approach 2:
The recirculation channel serves multiple functions: it reduces pressure loss across the filter, prevents filter clogging by maintaining flow velocity, and enables continuous operation. This multi-functional design element reduces overall device complexity by consolidating several protective and performance-enhancing functions into a single structural feature.
3Reliability
If filter elements are arranged upstream of or at the inlet opening of the fluidic component, then particle filtration is improved, but the fluidic component can lose its function when the filter element is clogged
Solution Approach 1:
The recirculation channel ensures continuous fluid motion through the system by maintaining a bypass flow path. This continuous action prevents stagnant zones where particles could accumulate and clog the filter, ensuring the filtration system remains functional throughout the service life of the component.
Solution Approach 2:
The recirculation flow serves the filter element by continuously washing through it and preventing particle accumulation. The system essentially self-maintains the filter's functionality through the dynamic flow pattern, eliminating the need for external cleaning mechanisms or premature replacement.
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 design ensures the fluidic component remains functional despite particle-containing fluids, with a self-cleaning effect due to changing flow directions, reducing the risk of clogging and maintaining efficiency without the need for upstream filtration systems, thus minimizing pressure loss and increasing service life.
Implementation Method 1
The recirculation flow is directed towards the filter element in order to transport particles with the recirculation flow to the filter element
Implementation Method 2
at least one filter element is provided, which is arranged between the means for the targeted change in direction of the main flow and the flow chamber
Implementation Method 3
For an oscillating fluid deflection at the outlet opening of the fluidic component a means for the targeted change in direction of the fluid stream is provided
Data Source
AI summary
A fluidic component includes a flow chamber with at least one inlet opening and at least one outlet opening. The flow chamber can be traversed by a main flow of a fluid from the at least one inlet opening to the at least one outlet opening and includes at least one deflection device for the targeted change in direction of the main flow, in particular a periodic reversal of the main flow. The fluidic component includes at least one filter element between the deflection device for the targeted change in direction of the main flow and the flow chamber, in particular a deflection device for generating a varying approach flow direction for the main flow. The at least one filter element is not arranged upstream of the flow chamber or at the inlet opening of the flow chamber.