Abstract
Development of a micro-scale gas turbine power generator is underway at Tohoku University, Tohoku-Gakuin University, Sankyo Seiki Co., Ltd, and Ishikawajima-Harima Heavy Industries Co., Ltd. (IHI). The gas turbine has a centrifugal compressor and a centrifugal turbine of diameter 10mm. The impellers have fully 3-dimensional geometry machined by micro 5-axis end-mill. The objective of developing the micro-turbo charger is to confirm the possibility to realize the compressor efficiency over 62.5% at pressure ratio 3 and at design rotational speed of 870000 rpm. The mechanical design of the micro-turbocharger has been completed, and tested up to 500,000rpm. The compressor performance has been measured at 450,000rpm (52% of design speed).
