Exhaust Stack Geometry for Low-Turbulence Treated Gas Discharge
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Solution Overview
Problem
Existing exhaust discharge systems for machines, such as those described in U.S. Pat. No. 8,402,758, do not effectively manage exhaust gas flow, distance, and emission spread, leading to inefficiencies in exhaust treatment and emission reduction.
Innovation Solution
The proposed exhaust discharge system includes a first and second conduit with a unique configuration, where the second conduit's exit port is oblong in shape and positioned at an intersection angle of 125° to 150° to the first conduit, allowing treated exhaust to be efficiently conveyed and emitted, eliminating the need for an air injector and reducing turbulence and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional exhaust discharge systems are used, then exhaust can be discharged, but exhaust gas flow is not effectively managed leading to increased turbulence and pressure
Solution Approach 1:
The exhaust stack is divided into multiple segments: a first conduit with a first flow passageway and a second conduit with a second flow passageway. The exhaust flow is split between these two conduits, with the first conduit receiving exhaust from the ejector tube and the second conduit receiving exhaust from the first conduit. This segmentation distributes the exhaust flow, reducing turbulence and pressure in each individual passage while maintaining overall discharge efficiency.
2Productivity
If conventional exhaust discharge systems are used, then exhaust can be discharged, but the distance and dispersion of exhaust plume is not optimized
Solution Approach 1:
The second conduit is oriented at an intersection angle of 125° to 150° relative to the first conduit, changing the directional dimension of exhaust flow. The oblong exit port cross-section further modifies the flow pattern by distributing exhaust across a larger area. This dimensional change in flow direction and distribution extends the exhaust plume travel distance and improves dispersion efficiency.
3Productivity
If conventional exhaust discharge systems are used, then exhaust can be discharged, but noise and thermal issues are not reduced
Solution Approach 1:
By dividing the exhaust flow into two separate conduits with different orientations and flow passages, the system distributes thermal energy and noise generation across multiple paths rather than concentrating them in a single exhaust stream. This segmentation reduces the intensity of noise and thermal emission in any single direction while maintaining overall exhaust discharge functionality.
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
This configuration enhances exhaust flow velocity, reduces turbulence and pressure, and improves sound management, achieving efficient exhaust emission while maintaining regulatory compliance without the use of air injectors.
Implementation Method 1
The first conduit defines a first flow passageway and is arranged around a first longitudinal axis. The second conduit defines a second flow passageway downstream of the first flow passageway and is arranged around a second longitudinal axis.
Implementation Method 2
The skirt portion may be oriented to slope outward from the body portion. This configuration streamlines exhaust flow, reduces turbulence and pressure
Implementation Method 3
The exit port has an exit-port cross-section, wherein the exit-port cross-section is oblong in shape. The second longitudinal axis is disposed at an intersection angle to the first longitudinal axis. The intersection angle may be in a range of 125° to 150° and the exhaust stack is configured to convey treated exhaust from the skirt portion to the exit port, enhancing the velocity of treated exhaust emission
Data Source
AI summary
An exhaust discharge system is disclosed. The exhaust discharge system comprises an exhaust stack including a first conduit and a second conduit. The first conduit defines a first flow passageway and arranged around a first longitudinal axis. The first conduit including a skirt portion and a body portion disposed downstream of the skirt portion, and the skirt portion is oriented to slope outward from the body portion. The second conduit is disposed downstream of the first conduit. The second conduit defines a second flow passageway and is arranged around a second longitudinal axis, the second conduit includes a sidewall and an exit port, the exit port having an exit-port cross-section, wherein the exit-port cross-section is oblong in shape. The second longitudinal axis is disposed at an intersection angle to the first longitudinal axis, the intersection angle in a range of 125° to 150°. The exhaust stack is configured to convey treated exhaust from the skirt portion to the exit port.