Numerical simulation of flow in fouled axial flow compressor

摘要

In order to reveal fouling mechanism and monitor the particle trajectory, many researches simulated the flow in fouled compressor by modifying blade thickness and adding random size to blade surface. But it doesn't accurately reflect the real status of fouled compressor. This paper combines traditional flow field simulation technology with reverse design method. Gas phase and gas-solid phase flows of NASA rotor37 are implemented. Simulation result of gas phase shows that fouling cause the decrease of effective flow area, thus thermodynamic performance is degraded. Gas-solid phase flow shows that particles are not uniformly deposited on the blade surface. When particle is smaller, it is more easily deposited on the surface. And particle mass concentration is different in pressure surface and suction surface. Small particles play more important role in the fouling forming.