P32-10 超小型ガスタービンの伝熱解析

概要

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A numerical analysis was performed on the flow and heat transfer with combustion in a button-sized gas turbine in order to clarify the feasibility and problems peculiar to such a small gas turbine. An axisymmetric two-dimensional model, 21mm in outer diameter and 3.7mm in total thickness, was employed based on "H_2 demo engine" by Epstein et al. Compressor and turbine were modeled by a radial centrifugal force. A global chemical kinetics model was employed for the combustion of hydrogen. It was found that due to the internal heat transfer from the combustor through the solid the unburned gas is preheated which promotes the combustion, however, the compression efficiency decreases significantly due to the heat transfer. The effect of thermal insulation of the outer wall was also examined.
社団法人日本機械学会の論文
2002-06-14