NUMERICAL SIMULATIONS OF GAP FLOW ABOVE ROTATING DISK

Filip Wasilczuk; Paweł Flaszyński; Piotr Doerffer

NUMERICAL SIMULATIONS OF GAP FLOW ABOVE ROTATING DISK

Abstrakt

A rotating disk can be considered a basic configuration for the investigati ons of the impact of various conditions on the flow through the clearance between the s hrouded turbine blade and the casing. Numerical calculations using Fine/Turbo Numeca were conducted to examine the influence of the rotational velocity and the pressure differ ence across the disk on the flow conditions, especially the mass flow through the clearance. The results were validated using the experimental data. Moreover, the flow field was investigated t o reveal the vortices induced in the flow. The calculations showed a significant drop of the mas s flow with a rise of the rotation velocity. Additionally, the vortex created upstream of th e disk at higher rotation velocities was observed. The phenomenon of separation at the edge of the di sk was investigated.

Autorzy (3)

Filip Wasilczuk
- Środowiskowe Studium Doktoranckie WM Instytut Maszyn Przepływowych PAN
Paweł Flaszyński dr hab. inż.
- Instytut Maszyn Przepływowych PAN Zakład Aerodynamiki
Piotr Doerffer
- Instytut Maszyn Przepływowych PAN Zakład Aerodynamiki