The parameters which influence the performance characteristics of centrifugal compressors with air injection through nozzles at the rotor tip are developed using both dimensional analysis and a simple model. Experiments on a small centrifugal compressor show that the injection air pressure is the main influence on the overall performance such as excess torque, increased delivery pressure and increased delivery flow. With air injection the pressure-mass flow characteristics are displaced to the right with surge occurring at increased total mass flow rates and the overall pressure ratio across the compressor is increased for the same total mass flow.
Get full access to this article
View all access options for this article.
References
1.
LedgerJ. D.BensonR. S.FurukawaH.‘Improvement in transient response of a turbocharged diesel engine by air injection into the compressor’, S.A.E. Paper No. 730665. Presented at SAE Combined Commercial Vehicle Engineering and Operations and Powerplant Meetings, Chicago, June 1973.
