Compressor Aerodynamic Stability Diagnosis and Control
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Solution Overview
Problem
Current methods lack an integrated solution for diagnosing and controlling aerodynamic stability in compressors, failing to simultaneously research, analyze, provide real-time warnings, and implement online regulation of instability precursors, which are crucial for understanding complex instability mechanisms and improving aero-engine stability.
Innovation Solution
An apparatus and method that includes a measurement device for real-time pressure or velocity fluctuation measurement, a signal processing device for determining instability precursors, and a control and execution device for regulating compressor stability, using a combination of contact and non-contact measurement techniques and various control mechanisms like adjustable guide blades and self-recirculating injection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple independent research methods are used for compressor instability, then measurement precision and analysis capability are improved, but device complexity and system integration difficulty increase
Solution Approach 1:
The patent combines multiple independent measurement and control systems into a single integrated apparatus. The measurement device, signal processing device, and control execution device are merged into one coordinated system that simultaneously performs detection, analysis, and regulation of compressor instability precursors, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The integrated apparatus performs multiple functions including real-time measurement of pressure/velocity fluctuations, signal processing to identify instability precursors, and active control regulation. This multi-functional design allows a single system to replace multiple independent research methods while maintaining or improving measurement capabilities.
2Reliability
If real-time measurement and control of instability precursors is implemented, then compressor stability control is improved, but loss of time for data processing and control response increases
Solution Approach 1:
The signal processing device continuously monitors and processes measurement signals in real-time, identifying instability precursors before they develop into full-scale instability. This preliminary detection and processing enables proactive control actions that prevent instability events, maintaining reliability while minimizing time loss through continuous rather than periodic processing.
Solution Approach 2:
The control execution device receives processed signals from the signal processing device and implements real-time control adjustments to the compressor. This closed-loop feedback system ensures that control actions are based on current instability precursor conditions, improving response efficiency and reducing time delays between detection and correction.
3Measurement precision
If comprehensive measurement of pressure and velocity fluctuations at multiple positions is performed, then measurement precision is improved, but use of energy and device complexity increase
Solution Approach 1:
The measurement device is divided into multiple sensing elements positioned at different locations within the compressor to measure pressure and velocity fluctuations at specific critical points. This segmentation allows comprehensive spatial distribution detection while concentrating measurement resources at key positions rather than uniformly across the entire compressor, optimizing energy usage.
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
Enables real-time identification and regulation of compressor stability, capturing pre-stall and stall precursors, and improving stability control, thereby addressing scientific issues in turbomachinery and enhancing aero-engine stability with the accumulation of experimental data.
Implementation Method 1
the optical measuring instrument is disposed outside the casing to emit a laser light and receive light signal reflected by the reflective particles in the airflow in the compressor
Implementation Method 2
receive light signal reflected by the reflective particles in the airflow
Data Source
AI summary
An apparatus for diagnosing and controlling the aerodynamic stability of a compressor and method there of are provided. The apparatus includes a measurement device (100), a signal processing device (200) and a control and execution device (300), wherein the measurement device (100) is configured to measure the pressure or velocity fluctuations of air flows in different positions inside a compressor in real time, and to transmit real-time measurement signals obtained from different positions to the signal processing device (200); the signal processing device (200) is configured to determine, according to the real-time measurement signals, a type and spatial distribution of instability precursor in the compressor, and to output corresponding control strategy signals to the control and execution device (300); and the control and execution device (300) executes, according to the received control strategy signals, corresponding control actions to regulate the stability of the compressor (S3).