In this study, the aerodynamic analysis of Ahmed body which is generic automobile model performed to determine convenient turbulence and reduce drag coefficient by modifying shape model. For purpose, Computational Fluid Dynamics (CFD) carried out using different models that are Spalart-Allmaras, (Shear Stress Transport) SST k-ω, Standard k-ε, Realizable (Re-Normalisation Group) RNG k-ε models. ...

Abstract The vortex-dominated flow around the triple-delta wing ADS-NA2-W1 aircraft is investigated in order to achieve a better understanding of physics phenomena that occur over particularly at transonic speed condition. Both URANS and scale-resolving DDES have been employed explore range suitability current CFD methods. Spalart–Allmaras One-Equation Model with corrections for negative turbul...

For the analysis of low-speed incompressible fluid dynamics with turbulence around airfoils, we developed a finite element formulation based on stabilized pressure and velocity formulation. To shape optimization bidimensional this is applied using machine learning (TensorFlow) public domain global algorithms. The goal to maximize lift-over-drag ratio by class-shape function transformation (CST)...

Galloping is a typical wind-induced phenomenon in iced conductors, which can have serious impacts on the safe and stable operation of power systems. The aerodynamic characteristics an conductor are key factor study galloping, be determined mainly by numerical simulation flow past conductor. Based Reynolds-averaged Navier-Stokes (RANS) equations closed Spalart-Allmaras (S-A) turbulence model, th...

The nonstationary separated incompressible flows around Darrieus and Savonius rotors of vertical-axis wind turbines were investigated through computational simulation using the Reynolds averaged Navier–Stokes equations Spalart–Allmaras turbulence model. implicit finite-volume algorithm, basis which was artificial compressibility method, chosen to obtain numerical solution. series physical exper...

Ground effect phenomenon is found when the lift-device such as wing, placed near ground. This influences aerodynamics characteristic whereby its appearance important to be investigated. work aims study influence of ground towards characteristion on NACA4415 airfoil by varying airfoil’s angle attack (AoA) well height proximity. Numerical approach conducted Fluent was carried out while steady ass...

This paper highlights the results and comparison of flow topology investigation above unmanned combat aerial vehicle (UCAV) configuration, namely, multidisciplinary design configuration (MULDICON), with modified leading-edge profile at apex region from a sharp to blunt reduce complexity structure wing. It was found visualization that low angle attack, for instance, 10°, onset separation took pl...

The purpose of this paper is to analyze the flow field structure in transient state and performance of secondary injection system for thrust vectoring in divergent section of a two-dimensional nozzle. Secondary injection for thrust vectoring in a two-dimensional nozzle is studied by solving three-dimensional Reynolds-averaged equations by means of fluent solver. Spalart-allmaras model was used ...

Over the past years, there has been innovative ideas about data-driven turbulence modeling proposed by scholars all over world. This paper is a continuity of these significant efforts, with aim offering better representation for physics. Previous works mainly focus on viscosity or Reynolds stress, while are few transition. In our work, two mapping functions between average flow parameters and t...

The present work studied various models for predicting turbulence in the problem of injecting a fluid microjet into boundary layer turbulent flow. For this purpose, one-equation Spalart–Allmaras (SA), two-equation k–ε and k–ω, multi-equation transition k-kL–ω, shear stress transport (SST), Reynolds were used solving steady layer, their results are compared with experimental results. Comparing i...