J081042 SOFC用排気再循環エゼクタの昇圧性能に与える燃料供給の影響([J08104]燃料電池(4))

概要

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Supersonic ejector for the anode gas recirculation system of SOFC was investigated. An axisymmetric convergent-divergent nozzle with 10° divergence angle was employed in the present study. The throat and the exit diameters of the nozzle are 0.66 mm and 0.775 mm, respectively, in which the Mach number reaches 1.69 at the nozzle exit with a gage total pressure of 0.321 MPa. The pressure increase through the ejector, which is defined as the pressure difference between the secondary flow inlet and the mixing outlet, was measured systematically. It is found that the pressure increase is much lower than the computational results with the 1-D model due to the significant pressure loss in the secondary nozzle. When iso-octane is supplied to the primary nozzle as the fuel, the pressure increase is enhanced in the present experiment, which is in accordance with the numerical results.
一般社団法人日本機械学会の論文
2011-09-11