Numerical Simulation And Experimental Research On Internal Flow Field Of 2.5 Stage Compressor

With the widely use of gas turbines in production and living,the performance of compressors nowadays is required even higher,which means that there is a high requirement on the design of the compressor runner,while at the same time meeting relatively high efficiency,the loss of efficiency is mainly reflected in the loss of air flow inside the compressor.Therefore,it is very important to explore the real state of its internal flow and increasing efficiency.In this paper,a 2.5-stage compressor is taken as the research object.Through the combination of numerical simulation and experiment,the variation and the influence on the performance of the compressor with different rotation speed and rotation angle are analyzed.And the relationship between numerical simulation and experimental measurement results is discussed.The main contents are as follows:1.The performance of the 2.5-stage compressor is analyzed.The NUMECA software is used to simulate the different speed conditions of the compressor,to explore it with the compressor Compared with the experimental results,the error causes of the design speed and the surging condition at different speeds are compared and analyzed.2.By means of PDA measurement,the non-contact measurement of the internal flow field of the compressor is realized.The speed parameters of the measured internal flow field are compared with the numerical calculation results in detail,and the deviations and the causes of the results are analyzed.The numerical simulation of the internal flow field reliability is explored.3.The numerical simulation analysis of the influence of the angle of the inlet guide vane of the 2.5-stage compressor on the performance of the compressor is carried out.Combined with the above PDA measurement method,the change of the flow field inside the compressor is compared and analyzed.Impact on compressor performance and loss.