In the present paper, a nonlinear multi 'actuator disk' model is proposed to analyze the dynamicbehavior of flow instabilities, including rotating stall and surge, in high speed multistage axial compressors. T...In the present paper, a nonlinear multi 'actuator disk' model is proposed to analyze the dynamicbehavior of flow instabilities, including rotating stall and surge, in high speed multistage axial compressors. The model describes the duct flow fields using two dimensional, compressible and unsteadyEuler equations, and accounts for the influences of downstream plenum and throttle in the system aswell. It replaces each blade row of multistage compressors with a disk. For numerical calculations,the time marching procedure, using MacCormack two steps scheme, is used. The main purpose of thispaper is to predict the mechanism of two dimensional short wavelength rotating stall inception and theinteraction between blade rows in high speed multistage compressors. It has been demonstrated thatthe model has the ability to predict those phenomena, and the results show that some system parameters have a strong effect on the stall features as well. Results for a five stage high speed compressorare analyzed in detail, and comparison with the experimental data demonstrates that the model andcalculating results are reliable.展开更多
文摘In the present paper, a nonlinear multi 'actuator disk' model is proposed to analyze the dynamicbehavior of flow instabilities, including rotating stall and surge, in high speed multistage axial compressors. The model describes the duct flow fields using two dimensional, compressible and unsteadyEuler equations, and accounts for the influences of downstream plenum and throttle in the system aswell. It replaces each blade row of multistage compressors with a disk. For numerical calculations,the time marching procedure, using MacCormack two steps scheme, is used. The main purpose of thispaper is to predict the mechanism of two dimensional short wavelength rotating stall inception and theinteraction between blade rows in high speed multistage compressors. It has been demonstrated thatthe model has the ability to predict those phenomena, and the results show that some system parameters have a strong effect on the stall features as well. Results for a five stage high speed compressorare analyzed in detail, and comparison with the experimental data demonstrates that the model andcalculating results are reliable.
