Application of Coolant Diffusion Equation in Numerical Simulation of Flow in Air-cooled Turbines

作者：Wang Qiang^*; Yan Peigang; Dong Ping; Feng Guotai; Wang Zhongqi

来源：Chinese Journal of Aeronautics, 2009, 22(3): 243-249.

DOI：10.1016/S1000-9361(08)60094-1

• turbine
• coolant mixing
• mass diffusion
• variable specific heat

This article deals with time-averaged coolant diffusion equation in arbitrary, body-fitted coordinates. Schmidt number and Lewis number are used to obtain the mass diffusion coefficient. Other than the existing N-S solver, a new solver for the diffusion equation and the influences of cooling air on the thermal parameters, such as gas constant, constant-pressure specific heat, is established. Capable of simulating the flow of multi component fluid, this solver is used to Simulate the flow in air-cooled two-stage turbines. The comparison of test results from the modified solver to those from the traditional N-S solver has evidenced that a marked difference present is in thermal parameters and flow field structure.

• 出版日期2009-6
• 单位哈尔滨工业大学