A-8 A/Rおよびウエストゲートポート径をパラメタとしたラジアルタービンの性能評価(空力I,一般講演)

概要

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Numerical simulations of radial turbines are conducted with various A/R, waste gate port diameter and gate open angle. The amount of outlet mass flow rate through the waste gate port increases with smaller A/R or larger port diameter. The area-averaged circumferential momentum on the nozzle, which corresponds approximately to the turbine revolving speed, is linearly related to only the pressure drop between inlet and nozzle. There are two minimal and one maximal values on the circumferential momentum distribution at the nozzle. A series of simulations clarified that the circumferential momentum fluctuation on the nozzle decreases with the smaller A/R, whereas the port diameter has little effects on the fluctuation.
公益社団法人日本ガスタービン学会の論文
2008-10-01