Labyrinth seal force estimates are important to the prediction of the stability of turbomachinery. The force prediction methods fall into several categories: experiments, bulk flow analysis, and finite volume analysis. Finite volume analysis can be split into two subcategories: selfdeveloped and commercial. In this research, a commercial computational fluid dynamics (CFD) program called ANSYSCF...

For better design and optimization of the heat exchanger (HX), forced convective transfer flow characteristics supercritical carbon dioxide (SCO2) in a water-cooled experimental counter-flow tube-in-tube HX were studied numerically with three-dimensional Reynolds-averaged Navier-Stokes equations shear stress transport (SST) turbulence model by using computational fluid dynamics method ANSYS CFX...

The recent development of large wind turbines poses new challenges with regard to understanding the mechanisms surrounding unsteady flow-structure interaction. The larger and more flexible blades imply risks from an aeroelastic point of view and urge the need to properly understand and model these phenomena. Due to limited experimental data available in this field, Computational Fluid dynamics ...

Abstract Cavitation is a phenomenon that occurs easily during rotation of fluid machinery and can decrease the performance pump, thereby resulting in damage to flow passage components. To study influence wall roughness on cavitation centrifugal three-dimensional model internal field pump was constructed numerical simulation conducted with ANSYS CFX software based Reynolds normalization group k ...

Sediment erosion is a negative phenomenon for the water turbine. The purpose of this paper to study effect guide vane opening on particle motion and sediment in band chamber using Euler–Lagrangian approach. software Ansys CFX Tabakoff model are used simulate laden flow full passage hydraulic results good agreement with actual character site. Results show that has positive correlation non-cleara...

The centrifugal fan is widely used in converting mechanical energy to aerodynamic energy. To improve the pressure of multi-blade an air purifier, optimization process was proposed based on extreme learning machine (ELM) combined with particle swarm (PSO). blade definition position parameter and radian were designed using full-factor simulation experimental method. steady numerical each point ca...

The paper deals with numerical simulations of transonic flow through the turbine blade cascade consisting flat profiles. is one variants tip section ultra-long blades, which were designed for last stage steam turbine. CFD realized by means ANSYS CFX commercial software using γ-Re θ bypass transition model completed two-equation SST turbulence model. Some made only comparison. Numerical results ...

At present, software products for numerical simulation of fluid dynamics problems (ANSYS Fluent, Ansys CFX, Star CCM, Comsol, etc.) are widely used. These mainly based on the solution Navier–Stokes equations, most common and computationally easy method solving, which is Reynolds averaging (RANS), further closing system using semi-empirical turbulence models. Currently, there many modeling metho...

Numerically challenging, comprehensive benchmark cases are of great importance for researchers in the field of CFD. Numerical benchmark cases offer researchers frameworks to quantitatively explore limits of the computational tools and to validate them. Therefore, we focus on simulation of numerically challenging benchmark tests, laminar and transient 3D flows around a cylinder, and aim to estab...

This paper presents development of an algebraic grid generation algorithm applicable to Finite Volume Method for Computational Fluid Dynamics (CFD) calculation of variable pitch twin screw machines. It is based on the principles developed for the uniform pitch rotors with constant cross-section profile. The same algorithm could be also used for rotors with variable profile geometry. Performance...