As air traffic continues to increase in the sub-tropical areas where high moisture laden air is present at sub-freezing conditions, engine icing probability increases. A better understanding of the compressor dynamics under icing conditions will help designers to develop more accurate and fast ice detection systems and anti-icing mechanisms. It has been shown that compressor stages re-match under icing conditions - front stages are choked while rear stages throttle due to ice melting and evaporation. Such an analysis uses various empirical models to represent ice-breakup and water-splash processes as ice/water particles interact with rotors/stators. The following paper presents a compressor stall sensitivity analysis around different splash models. The effect of droplet splash at both rotor and stator blades, blade solidity effect and trailing edge shed effect are modeled. A representative 10 stage high speed compressor section operating near design point (100% corrected speed) is used for the study. Results show that the temperature drop at HPC exit and the overall compressor operability is a function of evaporating stages and droplet-blade interaction models influence them. A comprehensive compressor stability envelope has been evaluated for different models. It is observed that the droplet-blade interaction behavior influences overall compressor stability and the stall-margin predictions can vary by as much as 25% with different models. Therefore, there is a need for better calibration and continual improvement of empirical models to capture compressor inter-stage dynamics and stage re-matching accurately under ice/water ingestion.
Effect of Ice and Blade Interaction Models on Compressor Stability
2016
Aufsatz (Zeitschrift)
Englisch
Effect of Ice and Blade Interaction Models on Compressor Stability
Online Contents | 2017
|Blade Row Interaction Effects on Compressor Measurements
Online Contents | 1993
|Blade row interaction effects on compressor measurements
AIAA | 1993
|Uncertainty quantification of blade geometric deviation on compressor stability
Emerald Group Publishing | 2024
|Emerald Group Publishing | 1999