Numerical Investigation of Active Control Casing Treatment for Surge Control in a Centrifugal Compressor

Surge instability is a critical issue that frequently plagues centrifugal compressors at low flow rates. To address this urgent challenge, high-fidelity computational fluid dynamics (CFD) simulations are employed as the primary method to comprehensively evaluate the effect of active control casing treatment (ACCT) on surge mitigation in a centrifugal compressor. The core objective is to enhance the compressor’s pressure rise and flow stability under near-surge conditions. The results reveal that the application of ACCT significantly enhances flow stability and increases the peak pressure rise of the centrifugal compressor by up to ۸.۸۴% under optimal conditions. Furthermore, the optimal injection pressure range for achieving peak stability enhancement is identified as ۲۵۰-۴۵۰ kPa, with ۳۵۰ kPa yielding the greatest improvement. While this qualitative rule provides general reference for other compressors, the optimal injection pressure range may differ due to variations in compressor performance parameters. These results highlight the potential of ACCT as an effective mechanism for enhancing compressor stability and offer practical guidelines for the design of surge control systems.

کلیدواژه ها:

Numerical simulation ، Centrifugal compressor ، Anti-surge control ، Active control casing treatment ، Stability enhancement