Numerical Investigation of Nonequilibrium Flow Mechanics Dpending on Time and Space Scales in Non-perfect Gas

本研究的目的是发展非理想气体中随时间和空间尺度变化的非平衡流动现象的计算算法。特别是考虑了具有均相成核和非均相成核的非平衡凝析油流动、具有热非平衡的磁等离子体动力学(MPD)流动以及具有凝结的极低马赫数流动。对考虑非平衡凝结的湿汽轮机定子-转子相互作用进行了数值模拟。2001年，提出了一种基于预条件方法的低马赫数凝结水流动的计算算法。开发了用于求解具有热非平衡的MPD流动的计算程序。2002年，利用2000年开发的凝结模型，对大气飞行条件下的跨音速凝析油流动进行了数值模拟。此外，还利用2001年发展的预条件算法计算了低重力环境中有凝结的热对流。

The purpose of this research is to develop the computational algorithms for solving nonequilibrium flow phenomena deeply depending time and space scales in non-perfect gas. Especially, nonequilibrium condensate flows with homogeneous and heterogeneous nucleation, magneto-plasma dynamics(MPD) flows with thermal nonequilibrium, and very low-Mach-number flows with condensation were taken into consideration.In 2000, a condensation model which is applicable to condensation with heterogeneous nucleation in atmospheric weather conditions was developed. Numerical simulations for turbine stator-rotor interaction in wet-steam turbine considering nonequilibrium condensation were also executed.In 2001, a computational algorithm based on the preconditioning method for solving low-Mach-number condensate flows was developed. A computational code for solving MPD flows with thermal nonequilibrium was also developed.In 2002, transonic condensate flows in atmospheric flight conditions were numerically investigated using the condensation model developed in 2000. Furthermore, thermal convections with condensation in low gravity environment were calculated using the preconditioning algorithm developed in 2001.