蒸気の熱力学特性を考慮した二次元翼間乱流解析(流体工学,流体機械)

概要

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Computational technique for turbulent flows through two-dimensional steam turbine cascades are presented. A flux-splitting procedure is developed taking into account the thermodynamic properties of steam. The computational results of steam turbine nozzles are compared with the results with ideal gas properties. The mass flow rates are different from those based on ideal gas properties. However, non-dimensional characteristic values, which are mass flow rate coefficients, flow angles and energy loss coefficients, agree well with each other, where the specific heat rate of ideal gas computations is 1.3 in the superheated steam region and is 1.135 in the wet steam region. And it is cleared that assuming ideal gases with 1.135 for the specific heat rate of wet steam is appropriate in order to design blades and estimate the limited load condition in the supersonic flow region.
一般社団法人日本機械学会の論文
2003-05-25