The numerical nalaysis technology has bene widely developed a an important tool in engineering design by a prie cutting and rapid development of the CT(Computer Technology),especially the speed-up of engineering Workstation (EWS) and Personal Computer (PC).On the other hand,the advancement of Computational fluid Dynamics (CFD) technologies are also remarkable,a variety of analytical new.techniques and the turbulent flow mdoels are proposed,and these techniques ahve come to be able to apply to complicated flow analysis,Recently,a lot of swimulatiosn which the separation and swirl are accompanied are announcedone after another and the range of application has become wider.Moreover,computer pgaphics (CG) technology develops resmarkably in recent years and this strong drafting tool is used to make an analytical result and the data processing result visual on the computer display in real time.
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