Rotating Wall Particle Separator for Aero Engine Intake
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Solution Overview
Problem
Existing inertial particle separators for aero engines have fixed geometries, limiting their ability to adapt to multiple functions and varying operating conditions, leading to inefficiencies in particle separation and increased pressure loss during cruising states.
Innovation Solution
A particle separator with a C-shaped intake and a rotating wall surface at the bending segment, which controls the inlet area of a separation flow path to segregate particles from the airflow, allowing for efficient particle separation and closure of the separation flow path when not needed to minimize pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed geometry inertial particle separator is used, then particle separation function is provided, but the device cannot adapt to different working conditions and causes continuous pressure loss
Solution Approach 1:
The patent applies the dynamics principle by making the particle separator's flow path adjustable through a movable partition wall that can change position between separated and merged states, allowing the device to adapt its geometry dynamically based on operational requirements rather than being fixed
2Reliability
If the separation flow path is kept open to maintain particle separation capability, then particle separation is available, but total pressure loss increases during cruising state
Solution Approach 1:
The movable partition wall enables dynamic adjustment of the separation flow path, allowing it to be open when particle separation is needed and closed or merged when not needed, thus eliminating continuous pressure loss during cruising operations
Solution Approach 2:
The patent changes the geometric parameters of the flow path by moving the partition wall between different positions, transforming the separation flow path from an open state to a closed or merged state, thereby adjusting the system's pressure loss characteristics
3Productivity
If the inlet flow rate is increased to ensure engine flow rate during particle separation, then engine flow requirement is met, but total pressure loss becomes greater
Solution Approach 1:
The dynamic adjustment of the separation flow path allows the system to optimize flow distribution, enabling particle separation without requiring excessive inlet flow rate increases, thus reducing the associated pressure losses
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 solution achieves efficient particle separation with high separation efficiency for coarse and fine sand, reduces total pressure loss and flow distortion, and allows the particle separator to be inactive during cruising states, thereby improving engine performance and extending service life.
Implementation Method 1
sand dust is thrown away from an airflow trajectory to a wall surface with its great inertia when the airflow turns sharply
Data Source
AI summary
Provided is a particle separator for an intake, relating to the technical field of aero engines. The particle separator for an intake includes a C-shaped intake, and a particle separation device. The intake is divided into an inlet segment (2), a bending segment (3), and an outlet segment (4). A direction of an airflow at the inlet segment (2) is reversely bent by 180° through the bending segment (3), and then the airflow enters the outlet segment (4); and the outlet segment (4) is externally connected. The particle separation device is arranged at the bending segment (3), and includes a separation flow path (7) outward in an air inlet direction. The airflow is controlled to be separated by controlling an inlet of the separation flow path (7), which makes most particles in the airflow discharged through the separation flow path (7) along with the airflow.