Fluidic Spray Circuit Geometry for Uniform Oscillation Across Temperatures
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Solution Overview
Problem
Existing fluidic geometries struggle to produce reliable, oscillating sprays across a wide range of operating parameters, including varying temperatures, fluid viscosities, and flow rates, which is essential for effective cleaning in diverse environmental conditions.
Innovation Solution
A fluidic geometry featuring a major island and a minor island within an interaction chamber, with two power nozzles positioned off-center, creates an exchange channel that generates an inertance effect. This configuration allows for controlled oscillating spray patterns, maintaining consistency across different temperatures and fluid compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluidic geometries (mushroom, reverse mushroom, three jet island) are used, then oscillating spray patterns can be produced, but the spray uniformity deteriorates at varying temperatures and fluid viscosities
Solution Approach 1:
The patent modifies the fluidic circuit parameters by changing the interaction chamber geometry, power nozzle positioning, and exchange channel dimensions to optimize spray performance across varying temperatures and viscosities
Solution Approach 2:
The patent introduces dynamic flow control through the exchange channel that allows the fluid path to shift between major and minor islands, creating adaptive oscillating spray patterns that maintain uniformity across different operating conditions
2Adaptability or versatility
If fluid viscosity increases at lower temperatures, then spray uniformity deteriorates, but the need for reliable spray across temperature ranges increases
Solution Approach 1:
The patent adjusts fluidic parameters including channel dimensions, nozzle orientations, and interaction chamber geometry to compensate for viscosity changes across temperature ranges, maintaining spray uniformity from -40°F to 100°F
Solution Approach 2:
The patent divides the fluid path into separate major and minor islands with distinct exchange channels, allowing independent optimization of flow paths for different temperature conditions and improving overall spray consistency
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 proposed fluidic geometry achieves consistent and uniform oscillating spray patterns across a broad range of temperatures and fluid types, ensuring reliable performance in diverse cleaning applications, including those in extreme weather conditions.
Implementation Method 1
The exchange channel creates an inertance effect that can be controlled and adjusted so as to provide the desired oscillating spray fan produced by the geometry
Data Source
AI summary
A fluidic geometry to produce uniform oscillating sprays is described. The geometry can be embodied as an insert, housing, or system in which an inlet feeds an interaction chamber. A major island is disposed at the upstream end of that chamber so as to create two power nozzles that are positioned off of the centerline axis and downstream of the major island. A minor island is also disposed within the interaction chamber, but remains spaced apart and downstream of the major island so as to define an exchange channel. The exchange channel creates an inertance effect that can be controlled and adjusted so as to provide the desired oscillating spray fan produced by the geometry. This arrangement exhibits consistent cold and high temperature performance for a range of fluid compositions and operating conditions.