Compressor efficiency in the light of blade-fluid thermal interaction

7th European Thermal-Sciences Conference

Kura, T.^1 ; Fornalik-Wajs, E.^1

AGH University of Science and Technology, Department of Fundamental Research in Energy Engineering, al. Mickiewicza 30, Cracow

30-059, Poland^1

关键词: Compressor efficiency;    Dynamic parameters;    Heat transfer effects;    High rotational speed;    Radial compressors;    Rotational speed;    Thermal interaction;    Three-dimensional numerical analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032065/pdf
DOI  :  10.1088/1742-6596/745/3/032065

来源: IOP

【 摘 要 】

Blade-fluid heat transfer effects in turbomachinery can have influence on its performance. With high rotational speeds, the dynamic parameters need to be considered, because they cause significant gradients of velocity, pressure and as a result - temperature. Three-dimensional numerical analysis of two radial compressor blades was conducted. Calculations were done for various rotational speeds. Air, treated as compressible ideal gas, was chosen as the working fluid. Results showed only a small change in heat absorbed by the blade due to an increase in rotational speed. Its value did not affected the efficiency and pressure ratio significantly. The main cause of this change was connected with turbulent eddies, occurring due to flow separation, as the result of second blade's design drawbacks.