小型ラジアルタービンの性能(第2報)

概要

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In our previous report, the design features and the experimental results of our first test turbine for the study of the small radial turbine were described. The experiment showed that the shapes of exducers would have strong influence on the performance of a small radial turbine. Accordingly, a test was carried out with four kinds of exducers with different axial flow velocity distribution and blade profiles. The second test turbine has the rotor of 58mm in diameter (76mm for the previous turbine), the speed of 100,000 r.p.m., the expansion ratio of 3.5 at the design point and uses air bearings. Experimental results obtained will be useful in providing data for choosing the profile of an exducer. The best turbine efficiency of 78% was obtained for this new turbine. Though this figure is not sufficient for its use as the powerelement of a gas turbine engine and should further be improved by aerodynamic refinements, there will be applications where the small bulk and light weight of high speed radial turbines are important and the efficiencies are not so critical.
独立行政法人海上技術安全研究所の論文
1964-03-30