Some current research in rotating-disc systems

Area of Science:

• Fluid dynamics
• Heat transfer
• Aerospace engineering

Background:

• Rotating-disc systems are crucial for modeling gas-turbine engine cooling-air systems.
• Understanding flow and heat transfer in these systems is vital for engine efficiency and longevity.

Purpose of the Study:

• To review recent computational and experimental research on three key rotating-disc systems.
• To discuss challenges and findings related to pre-swirl systems, rotating cavities with peripheral flow, and buoyancy-induced flow.
• To present heat transfer results for sealed annuli and rotating cavities with axial throughflow.

Main Methods:

• Review of computational fluid dynamics (CFD) research.
• Analysis of experimental data.
• Comparison of different rotating-disc system configurations.

Main Results:

• Detailed discussion of flow and heat transfer in rotor-stator systems with pre-swirl.
• Analysis of rotating cavities with peripheral cooling air inflow and outflow.
• Presentation of heat transfer results for buoyancy-induced flow in sealed and throughflow rotating cavities.

Conclusions:

• Buoyancy-induced flow in rotating cavities presents significant challenges for both computational and experimental research.
• Similarities exist between atmospheric circulation and gas-turbine rotor flows.
• The research provides insights into heat transfer mechanisms crucial for gas-turbine cooling system design.