风扇/压气机进口可变弯度导叶特性模型研究

Empirical model plays an important role in compressor through-flow design. This paper describes loss and deviation models of two-dimensional compressor variable camber inlet guide vane devices. First, a series of plane cascades with different geometry parameters were generated based on the thickness distribution of NACA 65-010 airfoil, and then the numerical calculation was carried out systematically under the condition that the inlet Mach number is 0.4. Based on the calculation results, dealing with the main cascade geometry parameters, such as cascade solidity, blade maximum relative thickness and back blade’s camber angle, the loss and deviation model of cascades at design operating condition is given. Then, taking incidence angle and back blade’s rotation angle into account, the loss and deviation model of cascades at off-design operating condition is given. Finally, through compared with the numerical calculation results of new cascades, it is found that the models can predict loss and deviation well, which indicates that the models have practical value in engineering.