Some Experiences in Surge Simulations of a Nine-stage Axial Flow Compressor in a Closed-loop Duct and Comparison with Experiments

抄録

From the aspect of the applicability of a code for compressor surge analysis to practical industrial plants utilizing axial flow compressors, a simulation code developed by the author was applied to a rather complicated system, in which a nine-stage axial flow compressor was operated in a closed-loop duct including an air cooler (heat exchanger) and a long side-branch line having a large volume, and other duct elements. The results showed reasonable agreements of macroscopic values such as surge frequencies, etc. in comparison with a few experimental data in the situation. The results also described reasonably the detailed behaviors of flows in both of the compressor and the duct. It could be said that the application of the code to practical situations is possible with a fair degree of accuracy, in the environment of sufficient approximations to the compressor and the flowpath configurations and preparations of suitable data for the simulations. At the same time, several requirements have been found for future improvements.