为了探索考虑引气影响的压气机设计方法,提出了一种基于周向槽引气的引气模型,通过将引气区域的机匣端壁无滑移边界条件替换为端壁法向引气速度代表的引气边界条件,把引气的影响计入压气机通流设计.一台两级压气机的无引气和引气通流设计以及三维数值模拟流场的对比研究表明,该引气模型和考虑引气的通流设计方法能够有效的将引气设计参数及其影响反映在通流流场结果中.此外,该引气模型和设计方法还能够准确反映引气流动随引气区域当地气动参数的变化.
In order to observe the throughflow design of compressor under the influence of bleeding flow,a bleeding model was set based on the circumference bleeding slot.Bleeding was considered in the throughflow design of compressor by changing the endwall no-slip-boundary condition of bleeding flow area into the velocity law of endwall for the new bleeding boundary condition.A comparative research between the bleeding and non-bleeding throughflow field and 3-D numerical analysis of a two-stage compressor show that,the bleeding model and its throughflow design method can reflect the influence of bleeding parameters as a result of the throughflow calculation.Furthermore,the bleeding model and its throughflow design method can also accurately reflect the change of bleeding with the local flow condition of bleeding flow area.