Research On Numerical Methods Of The Three Dimensional Unsteady Flow In Turbomachinery And Parallel Computational Algorithms

Numerical simulation of the unsteady flow in the compressor is very important for CFD researcher, and also is a hard work because of complexity.In this article, some problems of numerical simulation of the unsteady flow in the compressor are studied for multistage numerical simulation of the unsteady flow and unstable flow.In order to speedup the numerical simulation of the unsteady flow,firstly studied the parallel computing,and build up the parallel computer, then rewrited the 3 stage compressor steady code etc to parallel code to verify the parallel arithmetic.At the same time studied the interface for the numerical simulation of the unsteady flow. Introduce the sliding grid and interpolate conservation variable for the messege passing. Then using unsteady code simulated both predigest model and full stage of NASA Stage67. And compared result with experiment data and computing result of others, the show that the computing mothed of this article are capable and worth to improve.At last numerical simulated the Stage67 with inlet flow abnormal.inlet flow abnormal will decrease stabilization and efficiency and lead to stall and surge in compressor.Develop the simulation with inlet flow abnormal have significance to study the instability flow.