Two-Fluid Nozzle Silencer Structure for Low-Noise Atomization
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Solution Overview
Problem
Conventional two-fluid nozzles generate significant noise during operation, limiting their use in quiet environments such as indoors or for applications requiring minimal noise, despite achieving small particle sizes for atomized liquids.
Innovation Solution
Incorporation of a silencer with multiple through-holes outside the spray port to diverge the gas-liquid mixture, reducing noise by interfering streams and suppressing vortex formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a two-fluid nozzle is used to atomize liquid with gas, then atomization performance is improved and small particle diameters are achieved, but noise level increases significantly
Solution Approach 1:
The spray device is divided into distinct functional sections: a gas-liquid mixing unit for atomization and a silencer unit with multiple through-holes for noise reduction. The silencer is further segmented into multiple separate through-holes (at least three) that distribute and diverge the sprayed fluid streams, reducing vortex formation and noise generation while maintaining the fine particle diameter achievement of two-fluid atomization
Solution Approach 2:
The silencer acts as an intermediary component between the spray port and the environment. It receives the high-velocity gas-liquid mixture from the atomization process and gently diverges the streams through multiple through-holes, mediating the transition from high-speed jet flow to dispersed spray patterns, thereby suppressing vortex formation and reducing noise without compromising atomization quality
2Manufacturing precision
If gas and liquid flows collide to promote atomization, then liquid particle size is reduced, but noise is generated by the collision and jet flow
Solution Approach 1:
The noise reduction is achieved by segmenting the single jet flow into multiple separate streams through at least three through-holes in the silencer. This segmentation distributes the kinetic energy across multiple lower-velocity streams, reducing the intensity of vortex formation and noise generation while preserving the fine liquid particle sizes created by the initial gas-liquid collision in the mixing unit
Solution Approach 2:
The silencer with multiple through-holes transforms the spatial dimension of the spray from a single concentrated jet to multiple distributed streams. This dimensional change from one-dimensional jet flow to multi-dimensional dispersed flow reduces the coherence of vortex structures and associated noise, while the atomization process in the mixing unit maintains small liquid particle sizes
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 achieves a spray device that produces small particle diameters with reduced noise levels, expanding its applicability to a wider range of environments and applications.
Implementation Method 1
the silencer includes a plurality of through-holes via which the gas-liquid mixture fluid sprayed out of the spray port is diverged
Implementation Method 2
reducing noise by interfering streams and suppressing vortex formation
Implementation Method 3
a gas flow is guided into gas-liquid mixing unit 315 in a direction intersecting with the flow of liquid, so as to collide with the liquid flow
Implementation Method 4
atomizes liquid using the energy of gas such as air, nitrogen, or vapor
Data Source
AI summary
By providing silencer (55) included in spray device (10) with a plurality of through-holes (80) for diverging gas-liquid mixture fluid sprayed through spray port (52), it is possible to reduce the turbulence of an airflow generated at the time of spraying, and to reduce the noise.