Software development for CFD and CAD preprocessing

The above case study, to be further used for a refined analysis and design parameter identifica­tion. is just a modest example compared to the needed studies in the development of industrial software suitable for the envisioned multidisciplinary quality as outlined in the first book chap­ters. With the proven flexibility of the ideas developed here, a larger scale software development at industry, aerospace research establishment and university institutes has picked up the basic el – степь and merged them in their applied software systems:

At Daimler Ben/ Airbus aircraft industry a software system was developed as a pre­processor for multiblck structured grid generation around complete aircraft (126). The fast alge­braic definition of arbitrary surface metrics is ideal for application in multiblock/multigrid CFD analysis; many case studies exploiting the richness of possible configuration topologies with this approach have been carried out. Refinements in the algebraic gnd generation tools for opti­mum multiblock grid spacing have been implemented and complex transonic transport aircraft configurations with suitable grid blocks have been generated and used for CFD analysis.

Parametric studies of supersonic transport aircraft w ings have been performed at DLR German Aerospace Research Establishment (127). Sensitivity studies are earned out and a multi-point optimization design method is being worked on using some of our basic functions and curves. Results are obtained for conventional and new configurations, w ith optima found for relative positioning of the different components.

The emergence of new programming languages and faster and more powerful graphic workstations with larger storage capacity gave rise to the development of a new and completely interactive version of this geometry generator (128). Definition of a complex case study for a combined theoretical, numerical and experimental investigation sets various tasks for the new system to serve as a preprocessor for different CAD systems. These systems arc needed for wind tunnel model construction (CAT1A) and for unstructured CFD grid generation (ICEM). The latter is needed for performing Euler and Navier Stokes analysis with a new analysis axle using unstructured grids (129). Figure 66 illustrates a result of this analysis.

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