Water Film Formation and Performance Effect on Compressor Stage in Water Injection Process
-
Chunlei Liu
Abstract
In this study, the thickness of water film, which is frequently formed on compressor blade surface, was investigated. Simultaneously, its movement and extra torque demand were provided by a simulation model of the code. Having taken into account the transformation in blade’s profile and the thickness feature of the films, the working medium characteristic transformation in compressor stage was analyzed. In addition, formation, development and movement of the water film on a compressor stage were simulated by using unsteady numerical methods in various water injected conditions. Movement characteristics of water droplets in cascade were investigated to understand the flow mechanisms responsible for water film formation process. The forming and the tearing process of water films, which formed on the blade surface, were analyzed at different injection conditions. In consideration of the “Scoop effect” in actual situation, the maximum quantity of injected water can reach 12 %. Results indicated that continuity and region of the film would be developed with the increment of droplet size and injection rate. It was also found that water film’s tearing process brought about flow losses near blade surface due to the increment of surface roughness.
Nomenclature
- We
-
Weber Number [-]
- We P
-
particle’s Weber Number [-]
- Nu
-
Nusselt number [-]
- T PA
-
pure adhesion temperature [K]
- T PR
-
pure rebound temperature [K]
- T Wall
-
wall temperature [K]
- Stt
-
turbulent Stokes number [-]
- δf
-
Thickness of water film [μm]
- Ma
-
Mach number [-]
- Δp
-
Differential pressure [Pa]
Acknowledgements
The authors wish to thank the financial support of National Natural Science Foundation of China (Grant No. 51409067) and Fundamental Research Funds for the Central Universities of China (Grant No. HEUCF180305).
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© 2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Editorial
- Study on Global Aerodynamic Shape Optimization of Transonic Compressor Blade
- Original Research Articles
- The Migration of Corner Separation Flow in Multi-Channel Compressor Cascades at High Attack Angle
- Water Film Formation and Performance Effect on Compressor Stage in Water Injection Process
- A Novel Reliability Analysis Method for Turbine Discs with the Mixture of Fuzzy and Probability-Box Variables
- Numerical Study of Unsteady Pulsed Suction through Endwall Bleed Holes in a Highly Loaded Compressor Cascade
- A Study on Torsional Vibration Suppression Method for an Integrated Helicopter / Engine System
- Numerical Simulation of Supersonic Jet Control by Tabs with Slanted Perforation
- Effect of Gurney Flaps on the Aerodynamic Characteristics of NACA 0010 Cascades
- A Study on Nonlinear Model Predictive Control for Helicopter/Engine with Variable Rotor Speed Based on Linear Kalman Filter
- Performance Characteristic Modeling for 2D Compressor Cascades
- Numerical Investigation on Metrological Fidelity of a Shielded Thermocouple Probe and the Effects of Geometrical Parameters
- Experimental Study of Kerosene Ignition and Flame Stabilization in a Supersonic Combustor
- Metaheuristics Optimized Machine Learning Modelling of Environmental Exergo-Emissions for an Aero-Engine
- Nonlinear Model Predictive Control Strategy for Limit Management of Aero-Engines
- Numerical Investigation on the Cold Flow Field of a Typical Cavity-based Scramjet Combustor with Double Ramp Entry
Articles in the same Issue
- Frontmatter
- Editorial
- Study on Global Aerodynamic Shape Optimization of Transonic Compressor Blade
- Original Research Articles
- The Migration of Corner Separation Flow in Multi-Channel Compressor Cascades at High Attack Angle
- Water Film Formation and Performance Effect on Compressor Stage in Water Injection Process
- A Novel Reliability Analysis Method for Turbine Discs with the Mixture of Fuzzy and Probability-Box Variables
- Numerical Study of Unsteady Pulsed Suction through Endwall Bleed Holes in a Highly Loaded Compressor Cascade
- A Study on Torsional Vibration Suppression Method for an Integrated Helicopter / Engine System
- Numerical Simulation of Supersonic Jet Control by Tabs with Slanted Perforation
- Effect of Gurney Flaps on the Aerodynamic Characteristics of NACA 0010 Cascades
- A Study on Nonlinear Model Predictive Control for Helicopter/Engine with Variable Rotor Speed Based on Linear Kalman Filter
- Performance Characteristic Modeling for 2D Compressor Cascades
- Numerical Investigation on Metrological Fidelity of a Shielded Thermocouple Probe and the Effects of Geometrical Parameters
- Experimental Study of Kerosene Ignition and Flame Stabilization in a Supersonic Combustor
- Metaheuristics Optimized Machine Learning Modelling of Environmental Exergo-Emissions for an Aero-Engine
- Nonlinear Model Predictive Control Strategy for Limit Management of Aero-Engines
- Numerical Investigation on the Cold Flow Field of a Typical Cavity-based Scramjet Combustor with Double Ramp Entry
