AXISTRESS™
Flexible Parametric Modeling of Axial Blades for Compressors, Fans and Turbines
AXISTRESS provides flexible parametric modeling of axial blades for compressors, fans, and turbines. Detailed solid models with high-quality structured meshing, boundary conditions, aerodynamic loading, and probabilistic material models allow the analyst to work with a wide range of centrifugal and mixed-flow designs. The geometry includes platform, fir tree, shroud, blade, and fillets.
AXISTRESS provides complete model generation with nodes, elements, materials, loads, and boundary conditions.
Interoperability with AxCent® allows the user to obtain blade shape geometry and thermal and pressure loads.
Aerodynamic loads must be included when accurate answers are desired for many compressor and turbine analyses. AXISTRESS will import fluid velocity, pressure, temperature and properties from AxCent or CFD results. Combined with user definition of the pressure and fluid temperature on platform and shroud, the program computes convection heat transfer coefficients for flow path, platform, and shroud.
Blade shape data is read from data files in AxCent format. An OLE link to AxCent is provided for AGILE™ Engineering Analysis of blade shape iterations. AXISTRESS supports arbitrary blade shape, thickness, stacking, and blade angle distribution.
Blade fillets are modeled with a detailed structured mesh. The fillet can be circular or elliptical, with fully varying size. Fillet mesh density is fully controllable. Geometry is input with parametric definition of key dimensions. Contoured shroud, platform, and blisk profiles can be defined. Numerous geometry options are available for offset platforms, fir trees, locking pins, feather seals, etc.
Mesh density settings can be adjusted for optimum element shape and size. Mesh quality can be inspected with built-in aspect ratio and element angle checking.
Material properties are selected from a Microsoft Access™ format database. While properties for common engineering materials are provided, these can be updated by the user and new materials can be added. Database read/write permissions can be set.
Boundary conditions (structural and thermal) can be set for a variety of bore conditions. Cyclic symmetry models can be set up to solve for stress, vibration, and modal cyclic symmetry.
Mass and inertia calculations are performed using the generated single-blade mesh. The volume, mass, moments of inertia, and center of gravity are determined, and scaling is provided to get model properties for the entire stage.
Postprocessing functions allow the program to read output files from the FEA solver. Functions that are common to turbomachinery analyses are provided:
- Cyclic stress (Goodman diagram)
- Blade vibration (Campbell diagram)
IGES files are generated for geometry export to CAD/CAM systems. The output includes platform, shroud, fir tree, blade, fillets, and leading edges. Curve and surface options are available to customize the output for a specific CAD target.
AxCent is a registered trademark of Concepts ETI, Inc.
AXIAL is a trademark of Concepts ETI, Inc.
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