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This paper presents a comprehensive performance audit of a highly instrumented 91 mm single-stage turbocharger compressor. Numerous shroud static pressure and temperature taps are used to identify aerodynamic performance of various parts of the compressor, i.e., the inducer, impeller, vaneless diffuser, volute and exhaust diffuser. The pressure and temperature data obtained are corroborated with laser velocimeter measurements taken at the inducer, at the impeller tip and at the exhaust diffuser. This paper presents a data base for comparing data from other designs and a detailed procedure for instrumenting, testing, and evaluating comparative compressor designs for performance optimization.

This paper describes the design of a new turbocharger gas stand facility and shows how the design addresses requirements for increased productivity, measurement accuracy, economy, and operational safety. Based on this design, an automated turbocharger research and development test facility has been constructed. The test facility incorporates the latest technology in mechanical components, instrumentation, control systems and data acquisition hardware and software.