Filter Muffler Radial Damping Diffuser Pressure Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional filter silencers for exhaust gas turbochargers face challenges in achieving optimal sound attenuation, particularly at high flow velocities, and require significant installation space while causing pressure losses.
Innovation Solution
A filter silencer design featuring a front element, rear element, and radially arranged damping elements with diffuser elements having a downstream taper, forming a flow channel with an increasing cross section, and involute contours to reduce pressure losses and enhance damping properties, allowing for a more compact installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional filter silencers are used, then sound attenuation is achieved, but installation space is large and pressure losses occur
Solution Approach 1:
The filter element is integrated within the silencer housing, with damping elements arranged radially around the central flow channel. This nested configuration allows the filter and silencer functions to occupy the same spatial envelope, reducing overall installation space while maintaining both filtration and sound attenuation performance
Solution Approach 2:
The damping elements are arranged radially around the central flow channel, utilizing the radial dimension to create sound-absorbing pathways without increasing axial length. This dimensional approach allows effective sound attenuation within a compact cylindrical volume
2Object-affected harmful factors
If conventional filter silencers are used, then sound attenuation is achieved, but pressure losses increase
Solution Approach 1:
The diffuser elements are positioned specifically at the downstream ends of the damping elements, creating localized flow management zones. This local quality enhancement allows smooth flow transitions in critical areas while maintaining compact overall dimensions, reducing pressure losses without compromising sound attenuation
Solution Approach 2:
The flow channel cross-section increases in the downstream direction due to the tapered diffuser elements, changing the flow parameters gradually. This parameter change approach reduces flow velocity and pressure losses while maintaining effective sound attenuation across the damping elements
3Volume of stationary object
If damping elements are arranged radially, then compact design is achieved, but flow channel design becomes complex
Solution Approach 1:
The diffuser elements feature a downstream taper with a specific angle range (5° to 15°), creating smooth curved transitions in the flow channel. This curvature approach simplifies the flow path design while maintaining compact radial arrangement, reducing pressure losses without significantly increasing design complexity
Solution Approach 2:
The silencer is divided into a front element, rear element, and multiple radially arranged damping elements with diffuser elements. This segmentation allows each component to be optimized independently while maintaining overall simplicity, reducing manufacturing and design complexity
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 reduces pressure losses and improves damping performance, enabling a more compact and efficient filter silencer that minimizes sound attenuation issues at high flow velocities.
Implementation Method 1
Each downstream end has a diffuser element with a downstream taper, with an angle α between two opposite sides of the diffuser element, in particular the downstream taper, being selected from a range of 5° ≤ α ≤ 15°, such that the flow channel has an increasing flow cross-section on the downstream side
Implementation Method 2
Sound attenuation occurs dissipatively at the damping elements, with the sound energy being directly converted into heat by porous or fibrous absorption materials, which essentially comprise the damping elements
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a filter muffler (10) comprising a front element (11), a rear element (12), and a plurality of damping elements (20) which are arranged between the front element (11) and the rear element (12). The damping elements (20) are arranged radially about a central axis (16) of the filter muffler such that a flow channel (30) is formed between each pair of adjacent damping elements. The respective downstream ends (22) of the damping elements (20) each have a diffuser element (23) which has a downstream tapering. An angle α between two opposing sides of the diffuser element (23) is selected from a range of 1° ≤α ≤ 8°.