Broadband Silencer With Multi-Chamber Resonator
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Solution Overview
Problem
Supercharger and turbocharger compressors emit undesirable noise, particularly at high loadings, which existing noise suppression technologies have not effectively addressed.
Innovation Solution
A noise suppression resonator design featuring a series of chambers with varying aperture configurations, where each chamber is tuned to resonate at specific frequencies, reducing noise output by utilizing the mass and volume of air within the chambers and apertures to attenuate noise frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional noise suppression technologies are used, then some noise reduction may be achieved, but they fail to effectively address compressor noise at high loadings
Solution Approach 1:
The resonator is divided into multiple chambers (first chamber, second chamber, third chamber) with different aperture configurations. Each chamber is tuned to resonate at different frequencies, allowing the system to suppress a broader spectrum of compressor noise frequencies that conventional single-chamber designs cannot address effectively
Solution Approach 2:
Each chamber is given different local properties through varying aperture areas and configurations. The first chamber has a first aperture area, the second chamber has a second aperture area, and the third chamber has a third aperture area, creating localized resonance characteristics tailored to specific frequency ranges of compressor noise
2Object-affected harmful factors
If Helmholtz resonators are used to attenuate pressure pulsation, then noise reduction is achieved, but the device complexity increases
Solution Approach 1:
The resonator chambers are arranged in a nested configuration within the intake system. The multiple chambers are positioned concentrically or in series, with each chamber containing or surrounding elements of the others, allowing complex noise suppression functionality to be integrated into a compact structure that does not significantly increase overall device complexity
Solution Approach 2:
The noise suppression resonator is integrated with the existing intake system components. The resonator housing is formed as part of the intake system structure, and the chambers are combined with the compressor housing, merging noise suppression functionality with existing structural elements to avoid adding separate complex components
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 resonator effectively reduces noise output by resonating with desired frequencies, minimizing noise transmission through the intake system, and can be easily manufactured using suitable materials like plastics.
Implementation Method 1
each chamber is tuned to resonate at specific frequencies, reducing noise output by utilizing the mass and volume of air within the chambers and apertures to attenuate noise frequencies
Implementation Method 2
utilizing the mass and volume of air within the chambers and apertures to attenuate noise frequencies
Data Source
Figure 1
Figure 2
Figure 2A~2B
AI summary
An apparatus comprising includes a conduit portion having a conduit inner surface and a conduit outer surface, and a plurality of chambers in fluid communication with the conduit portion. The chambers include a first chamber defined, at least in part, by a first outer housing and a first chamber volume. The first chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the first chamber through a first flow area. The chambers also include a second chamber defined, at least in part, by a second outer housing and a second chamber volume. The second chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the second chamber through a second flow area. The first chamber volume is generally equal to the second chamber volume and the first flow area is greater than the second flow area. The chambers further include a third chamber defined, at least in part, by a third outer housing and a third chamber volume. The third chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the third chamber through a third flow area, wherein the first chamber volume is greater than the third chamber volume.