有机工质超音速动叶栅设计

Design of a Supersonic Rotor Blade Working with Organic Fluids

基于理想气体二维动叶栅设计理论,建立了适用于有机工质超音速动叶设计的实际气体模型.采用C++编写了工质R134a的动叶设计程序,给定入口和出口马赫数等设计参数,计算得到叶型壁面坐标,对实际气体模型得到的动叶栅进行了数值模拟,并与理想气体模型设计出的R134a动叶叶型进行了对比.结果表明:在饱和线附近稠密气体效应表现明显,实际气体模型与理想气体模型的设计结果差异较大,而远离饱和线时,稠密气体效应表现不明显,2种气体模型设计结果差异较小;数值模拟结果表明该实际气体模型是可行的.

Based on the design theory for two-dimensional rotor blade with ideal gas, a real gas model was established for the design of supersonic rotor blade working with organic fluids. By using C＋＋ to write the design program for rotor blade working with fluid R134a, under given conditions such as Mach number of import and export, the blade wall coordinates were obtained by calculation, and subsequently, a com- parison was made for the blade profile respectively designed by ideal gas model and real gas model. Results show that when the operation point is close to the saturation line of R134a, the dense gas effect becomes strong, resulting in obvious difference in the design of rotor blades by above two models, whereas, when the operation point is far away from the saturation line, the dense gas effect becomes weak, resulting in little difference in the design. Numerical simulation results indicate that the real gas model is reasonable and feasible.