Performance maps

A C++ software tools for the generation of centrifugal compressor maps. The tool was compared with Ansys Turbo tools and excellent agreement was observed. Tools that were used: Python C++ See the following… Continue reading

Optimization of Compressor Design

A software tool is implemented for the optimization of centrifugal compressor. Tools that are used: C code for the inducer design calculation for radial element leading edge C code for impeller diameter and… Continue reading

Fluid Structure Interaction – Impeller

This a a short case study of one way fluid structure interaction on a centrifugal compressor. The stress fields on the impeller of a centrifugal compressor are due to centrifugal forces, aerodynamic forces… Continue reading

Break out Modeling

Intro A break out model is a simulation model which represents a small portion of the initial model. For very large models this technique is useful to capture a more accurate representation of… Continue reading

Non-linear quasi-static analysis with contact

  A gasket (blue) is between two cylindrical tubes and the outer cylinder is subjected to a pressure. Modeling aspects of this case include: Non linear implicit static analysis Contact modeling Elastoplastic material… Continue reading

Thermal Stress Analysis- PCB

      Thermal stress analysis of printed circuit board during soldering process. The board is constrained from the mounting holes and a temperature load is applied at solder pads. The figure depicts… Continue reading

Fluid Structure Interaction Wind Turbines

Pressure and Velocity on Wind Turbine Blades

Contact stresses- Ball Bearing

      The objective here is to determine the max pressure at the surface of contact between the sphere and the outer ring. For this case a 3D simulation is not necessary.… Continue reading

Non Linear FEM- Cardiovascular stent

    Non linear FEM simulation of two cardiovascular stent designs. Due to symmetry conditions only a portion of the geometry was modeled in both cases.     Second Design      … Continue reading

Response surface optimization

  Generic Examples on Response Surface Optimization   For further details see following document: Response Surface Optimization.pdf      

Transition from thin to thick walled vessel

  An example of thick-walled cylinder subjected to internal pressure. The following topics are discussed: 2-D modeling Axisymmetric mode of symmetry Transition from thin to thick-walled vessel theory Mesh convergence study Verification and… Continue reading

Shear effect on Beams

A small case study which presents the limits of classical beam theory.  The following topics are discussed: Comparison between analytical and numerical results Deflection Normal stresses Shear stresses Singularities and St Venant’s principle… Continue reading

Stress concentration

                            A small report on stress concentration. Two simple cases are presented and FEM simulations are compared with approximation formulas… Continue reading

Blade vibration mode shapes and frequencies

      Intro This is a small case study regarding the vibration mode shapes and frequencies of a centrifugal compressor blade. For further information regarding this case see the following document:  BladeVibration.pdf  … Continue reading

Modal Analysis-Aircraft wing

  Intro Naca 64-012A profile was used. Surface of wing was reconstructed using spline fitting to the airfoil section points. Chord is 1 meter, span is 5 meter and thickness is 0.01m. One… Continue reading

Explicit Dynamics FEM. Bullet impact on steel

        This is an example of explicit dynamics. A bullet hits a mild steel. Half of the model has been simulated, (symmetry can be exploited more, quarter of the model… Continue reading

Explicit Dynamics FEM. Car hits a column

            A very simplified example of explicit dynamics. Lamborghini hits a rigid column. Velocity of car is 200 km/h and simulation was performed up to t=0.003 seconds. Please… Continue reading

Non-linear FEM. Plasticity of Beams

                For further information please see the following document: Plasticity of beams        

linear static FEM. Pressure Vessels

                          Linear static analysis on thin walled internal pressure vessels. Two cases are examined: Cylindrical vessel with hemispherical end caps Spherical… Continue reading

CFD. AXIAL TURBINE

      An example of steady state and transient simulation of axial turbocharger. The following components are modeled: Turbine blades Nozzle Ring