The objective of this Phase I project is to develop a highly automated software system for rapid geometry modeling and grid generation for turbomachinery applications. The proposed system features a graphical user interface for interactive control, a direct interface to commercial CAD/PDM systems, support for IGES geometry output, and a scripting capability for obtaining a high level of automation and end-user customization of the tool. The developed system is fully parametric and highly automated, and, therefore, significantly reduces the turnaround time for 3D geometry modeling, grid generation and model setup. This facilitates design environments in which a large number of cases need to be generated, such as for parametric analysis and design optimization of turbomachinery equipment. In Phase I we have successfully demonstrated the feasibility of the approach. The system has been tested on a wide variety of turbomachinery geometries, including several impellers and a multi stage rotor-stator combination. In Phase II, we plan to integrate the developed system with turbomachinery design software and with commercial CAD/PDM software.Harrand, Vincent J. and Uchitel, Vadim G. and Whitmire, John B.Glenn Research CenterTURBOMACHINERY; DESIGN ANALYSIS; GRID GENERATION (MATHEMATICS); IMPELLERS; ROTORS; STATORS; COMPUTER AIDED DESIGN; GRAPHICAL USER INTERFACE; INTERACTIVE CONTROL; COMPUTERIZED SIMULATION; THREE DIMENSIONAL MODELS; COMPUTATIONAL FLUID DYNAMICS...