OS1-8 直径10mmの超小型遠心圧縮機の性能評価(OS1 マイクロエネルギー変換,分散と集中の共存)

概要

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The performance of a centrifugal compressor at micro-scale has been assessed by a combination of experiments and numerical calculations. A micro-compressor of 10mm diameter has been fabricated and tested at the condition of 75μm tip clearance. The test results showed higher adiabatic efficiencies than the target value for the compressor to realize a 100W class gas turbine generator. However, this is due to the heat leakage, and a heat leakage model is proposed to be added in the numerical simulations. After matching the calculation results to the experimental results by modeling the heat loss through the wall, calculations of various Reynolds number and tip clearances have been conducted. The study shows that the rate of efficiency reduction due to the increase of the tip clearance is within the range of the data that Pampreen [8] used to construct his model. The study shows that the target efficiency can be achieved by scaling up the impeller to 15mm and reducing the tip clearance to 50μm.
社団法人日本機械学会の論文
2006-06-28