小ソリディティディフューザの最適化に関する研究

概要

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Increase of output of diesel engines demands for high pressure ratio turbochargers. The pressure ratio of those centrifugal compressors is increasing up to 4.0. The wide operating range is necessary to follow the various working conditions of the engine. The replacement of the vaned diffuser with the low solidity diffuser might be one of the countermeasures to broaden the compressor operating range. This study discusses the results of the application of the low solldity diffusers for the compressor that was designed for the marine use turbochager of its pressure ratio of more than 4.0. Based on the tested results, the characteristics of the compressor with the low solidity diffusers were investlgated. The maximum flow rate, which the low solidity diffuser determlned, played an important role on the selection of the low solidity drffuser. This paper proposed the simple prediction method for the maximum flow rate in the low solidity diffuser.
社団法人日本ガスタービン学会の論文
2000-05-20