In order to shed light on the Vertical-Axis Wind Turbines (VAWT) wake characteristics, in this paper we present high-fidelity CFD simulations of flow around an exemplary H-shaped VAWT turbine, and propose apply Proper Orthogonal Decomposition (POD) computed field near rotor. The turbine under consideration was widely studied previous experimental computational investigations. first part study, ...

Large-Eddy Simulations (LES) of a gasoline spray, where the mixture was ignited rapidly during or after injection, were performed in comparison to previous experimental study with quantitative flame motion and soot formation data [SAE 2020-01-0291] an accompanying Reynolds-Averaged Navier–Stokes (RANS) simulation at same conditions. The present reveals major shortcomings common RANS combustion ...

This paper presents a computational study of the flow around DTMB 5415 at \(10^\circ \) static drift. Two RANS (Reynolds Averaged Navier-Stokes) turbulence models, as isotropic k-\(\omega SST and non linear anisotropic EARSM (Explicit Algebraic Reynolds Stress Model) one hybrid RANS-LES model, DES (Detached Eddy Simulation) based on \), are used with solver ISIS-CFD. All numerical results compa...

Developing boundary layer flow and the flow over a backward-facing step are studied here. The LRN PANS k − ε [1] and the WALE turbulence model [2] are used as SGS models. The PANS (Partially AveragedNavier-Stokes) modelling approach [3, 4] is a modified k − ε model that can operate in both RANS and LES mode. An extension of PANS based on a four-equation k− ε− ζ − f model was recently proposed [...

Abstract: Gas turbines are important energy-converting equipment in many industries. The flow inside gas turbines is very complicated and the knowledge about the flow loss mechanism is critical to the advanced design. The current design system heavily relies on empirical formulas or Reynolds Averaged Navier–Stokes (RANS), which faces big challenges in dealing with highly unsteady complex flow a...

The distributions of turbulent scales in a Mach 0.9 isothermal round jet are investigated for the purpose developing linear surface-based models noise source that can be informed by Reynolds-averaged Navier–Stokes (RANS) solution flowfield. is calculated large-eddy simulation (LES), which enables computation two-point space–time correlations throughout and its near-acoustic field. Time, length,...

An overview of scale-resolving simulation (SRS) methods used in ANSYS Computational Fluid Dynamics (CFD) software is provided. The main challenges, especially when computing boundary layers large eddy (LES) mode, will be discussed. different strategies for handling wall-bound flows using combinations RANS and LES models explained, along with some specific application examples. It demonstrated t...

Turbine inlet temperatures in advanced gas turbines could be as high 2000 °C. To prevent ingress of this hot into the wheelspace between stator and rotor disks, whose metals can only handle up to 850 °C, rim seals sealing flows are used. This study examines abilities large eddy simulation (LES) based on WALE subgrid model Reynolds-averaged Navier–Stokes (RANS) SST predicting a rotor–stator conf...