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Computational fluid dynamics for turbomachinery internal air systems.

John W Chew¹, Nicholas J Hills

¹Fluids Research Centre, School of Engineering, University of Surrey, Guildford, Surrey GU2 7XH, UK. j.chew@surrey.ac.uk

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences

|May 24, 2007

Summary

Computational Fluid Dynamics (CFD) advances aeroengine internal flow analysis. Advanced CFD models now handle complex geometries and unsteady flows, improving air system assessments and research into phenomena like buoyancy-driven flows.

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A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

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Area of Science:

Aerospace Engineering
Computational Fluid Dynamics
Turbomachinery

Background:

Computational Fluid Dynamics (CFD) is increasingly vital for aeroengine internal flow systems.
CFD performance for basic disc cavities is well-understood, with 3D features and unsteady flows now common.
Industry regularly employs CFD for air system assessments.

Purpose of the Study:

To review recent progress in CFD development and application for aeroengine internal flow systems.
To highlight current research areas and the use of CFD as a research tool.
To explore the potential of advanced CFD techniques for complex flow phenomena.

Main Methods:

Application of CFD for analyzing rotor/rotor and stator/rotor disc cavities.
Incorporation of three-dimensional geometrical features and unsteady flow calculations.
Coupling CFD with thermal models and extending models to include gas path flows.

Main Results:

CFD is routinely used in industry for air system assessment.
Advanced CFD techniques are becoming standard for complex geometries and unsteady flows.
CFD is a valuable research tool for phenomena like buoyancy-affected, rim seal, and mixed air/oil flows.

Conclusions:

CFD has made considerable progress in aeroengine internal flow analysis.
Current developments focus on automation, thermal coupling, and integrated flow modeling.
Large eddy simulation shows promise for buoyancy-driven flows, with expanded future use expected.