Inlet Particle Separator Bifurcated Flow Path
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Solution Overview
Problem
Conventional inertial inlet particle separators for vehicle engines increase pressure loss, leading to decreased engine power output and increased fuel consumption, while effectively separating particles from inlet fluids.
Innovation Solution
The inertial inlet particle separator system includes a separator assembly with a scavenge flow path and an engine flow path, coupled with a collector assembly that bifurcates the scavenge flow path to reduce the distance scavenge air must travel, and has a collector body cross-sectional area greater than the cumulative throat area, optimizing separation efficiency and reducing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional inertial inlet particle separator is used to separate particles from inlet fluid, then particle separation efficiency is improved, but pressure loss increases
Solution Approach 1:
The collector assembly is segmented into multiple collector channels that receive scavenge air from different locations along the separator assembly, allowing distributed collection that reduces pressure loss while maintaining separation efficiency
Solution Approach 2:
The scavenge air is collected from multiple spatial dimensions along the separator assembly length, rather than from a single location, creating a three-dimensional collection network that reduces flow resistance and pressure loss
2Reliability
If the scavenge flow path is extended to improve particle capture, then particle separation efficiency is improved, but the distance scavenge air must travel increases leading to higher pressure loss
Solution Approach 1:
The scavenge air collection is segmented into multiple entry points distributed along the separator assembly, allowing particles to be captured at various locations without requiring long travel distances for the scavenge air
Solution Approach 2:
Multiple intermediate collector channels act as mediators between the separator assembly and the final scavenge air outlet, providing multiple short-path routes for scavenge air to reach the exit while still capturing particles from along the entire separator length
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 the separation efficiency and reduces pressure loss, thereby improving engine performance and reducing energy consumption by minimizing the power required for the fan to draw scavenge air.
Implementation Method 1
As the name suggests, inertia tends to cause the particles to travel in a straight line rather than follow the curved fluid flow path
Implementation Method 2
The collector body defines a cross-sectional area associated with each position along the throat length... the respective cross-sectional area of the collector body is greater than or equal to the respective cumulative throat area
Data Source
AI summary
An inertial inlet particle separator system for a vehicle engine is provided. A separator assembly and collector assembly are coupled to the scavenge flow path and configured to receive the scavenge air. The collector inlet has a throat defining a cumulative throat area at each position along the throat length from the first throat end to the second throat end. The collector body defines a cross-sectional area associated with each position along the throat length between the first throat end and the second throat end. The collector outlet is coupled to the collector body such that scavenge air flows into the collector inlet, through the collector body, and out through the collector outlet. At a first position between the first throat end and the second throat end, the respective cross-sectional area of the collector body is greater than or equal to the respective cumulative throat area.