Analysis of the gas-dynamic performance of a vaned diffuser with given velocity distribution along the vane's surfaces

9th International Conference on Compressors and their Systems

Kalinkevych, M.^1 ; Obukhov, O.^2 ; Obukhova, O.^1 ; Miroshnychenko, A.^1

Sumy State University, Sumy, Ukraine^1

PJSC Frunze NPO, Sumy, Ukraine^2

关键词: Boundary layer theory;    Diffuser vane;    Dynamic performance;    Effective range;    Inverse task;    Outlet diameters;    Vane profile;    Vaned diffuser;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/90/1/012045/pdf
DOI  :  10.1088/1757-899X/90/1/012045

来源: IOP

【 摘 要 】

Extension of the effective range of vaned diffusers is one of the promising ways to improve the centrifugal compressor's stages which are used in numerous fields of industry. The new method of profiling of the diffuser vanes has been developed using Stratford's results and boundary layer theory by Loytsanskiy. The developed method is based on the solution of the inverse task of gas-dynamic using given velocity distribution along the vane's surface. Comparison of the results of numerical simulations for different diffusers has shown that the performance of the diffuser designed with the resulting velocity distribution are better. Influence of the vane profile, number of the vanes, diffuser outlet diameter and the diffuser width on diffuser characteristics has been investigated. The results of the simulations have been used to formulate recommendations on the design of high-effectiveness vaned diffusers for centrifugal stages of different types.