Gas Turbine Intake Device Settling Chamber Particulate Removal
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Solution Overview
Problem
Gas turbine engines face challenges in removing particulate matter from bleed gas, which can contaminate sensitive pneumatic system components, leading to improper operation and increased maintenance costs due to the limited effectiveness of conventional filters, especially in harsh environments.
Innovation Solution
An intake device with a snorkel and housing that includes a settling chamber with a large cross-sectional area, designed to receive pressurized bleed gas, where the gas velocity is reduced, allowing particulate matter to settle and be separated from the gas, thereby reducing the amount of contaminants reaching downstream components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filters are used to remove particulate matter from bleed gas, then some contamination reduction is achieved, but the filters are insufficient in harsh environments and require frequent maintenance
Solution Approach 1:
The intake device is segmented into distinct functional zones: a snorkel for selective gas intake, a settling chamber for particulate removal, and a housing for structural support. This segmentation allows each component to perform its specific function optimally, with the settling chamber specifically designed to handle particulate matter separation before gas enters the pneumatic system.
Solution Approach 2:
The invention extracts the particulate matter removal function from the conventional filter system and implements it through a settling chamber that uses gravity and flow management. This extraction creates a pre-filtration stage that removes heavy particulates before they reach downstream components, reducing the burden on conventional filters and maintenance requirements.
2Reliability
If the settling chamber cross-sectional area is increased to reduce gas velocity and improve particulate settling, then the chamber volume increases, but this may increase device complexity and space requirements
Solution Approach 1:
The settling chamber utilizes the vertical dimension by positioning the snorkel opening at an elevated position and allowing gas to flow downward into the chamber. This vertical arrangement maximizes the settling chamber's effective volume without requiring excessive horizontal space, efficiently creating a large cross-sectional area for particulate separation while maintaining compact overall dimensions.
Solution Approach 2:
The housing structure provides localized support and containment for the settling chamber, with the chamber's cross-sectional area being significantly larger than the outlet tube area only where needed for effective settling. This localized expansion of cross-sectional area optimizes particulate removal efficiency without unnecessarily increasing the overall device volume or complexity throughout the entire structure.
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 intake device effectively reduces the quantity of particulate matter exposed to downstream components, minimizing maintenance needs and ensuring proper operation of gas turbine engines by efficiently removing contaminants from the bleed gas.
Implementation Method 1
The settling chamber is configured to receive a bleed gas flow from the cavity. The housing further includes an outlet tube which extends through the housing from the settling chamber to an exterior of the housing. The second cross-sectional area is at least five times greater than the first cross-sectional area.
Implementation Method 2
where the gas velocity is reduced, allowing particulate matter to settle and be separated from the gas
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An intake device (56) for a gas turbine engine (10) includes a snorkel (64) and a housing (82). The snorkel (64) includes a tubular body (68) and an inlet aperture (74). The tubular body (68) extends between a closed end (70) and an open end (72) opposite the closed end (70). The inlet aperture (74) is formed through the tubular body (68) proximate the closed end (70). The housing (82) is mounted to the snorkel (64). The housing (82) includes an inner wall (92), an outer wall (94), a side wall (96), a settling chamber (84), and an outlet tube (86). The inner wall (92) is adjacent the snorkel (64). The outer wall (94) is opposite the inner wall (92). The side wall (96) extends from the inner wall (92) to the outer wall (94). The settling chamber (84) is within the side wall (96) between the inner wall (92) and the outer wall (94). The settling chamber (84) is fluidly coupled with the open end (72). The outlet tube (86) extends through the housing (82) from the settling chamber (84) to an exterior of the housing (82).