Analysis of the aerodynamic, thermal and aeroelasticity (including vibration) processes in gas turbine stage is principal for a design creating turbines jet engine integrally. In this article was review showed basic problems, which are solved by engineers take numerical analysis flow. The special aspects appearance vanes blades channels turbojets turbine. fundamental structure boundary layer vo...

Tip vortices are one of the most critical phenomena facing rotary wings such as propellers and wind turbine blades lead to changes in aerodynamic parameters blades. The winglet (WL) device is considered significant passive flow control devices. It used diminish strength at blade tip, enhance characteristics rotor blades, thereby increase overall efficiency. main objective this research improve ...

Purpose The purpose of this paper is to devise a tool based on computational fluid dynamics (CFD) and machine learning (ML), for the assessment potential airborne microbial transmission in enclosed spaces. A gated recurrent units neural network (GRU-NN) presented learn predict behaviour droplets expelled through breaths via particle tracking data sets. Design/methodology/approach methodology us...

One of the main limitations in computational aerodynamics lies ability CFD solvers to handle complex geometries while maintaining their accuracy. Among currently available strategies, Zonal Immersed Boundary Conditions (ZIBC) has shown its capability introduce geometrical details for simulations high Reynolds turbulent flows. In this context, work aims extend ZIBC framework, initially adapted r...

An improved coupling of immersed boundary method and turbulence wall models on Cartesian grids is proposed, for producing smooth surface pressure skin friction at high Reynolds numbers. Spurious oscillations are frequently observed these quantities with most modeling methods, especially the which found to be very sensitive solid surface's position orientation against grids. The problem originat...

Considering grid requirements of high Reynolds flow, wall-modeled large eddy simulation (WMLES) and detached (DES) have become the main methods to deal with near-wall turbulence. However, flow separation phenomenon is a challenge. Three typical separated flows, including over cylinder at ReD = 3900 based on diameter, wall-mounted hump Rec 9.36 × 105 length, transonic an axisymmetric bump shock-...

Aerodynamic performances may be optimised by the appropriate tuning of Active Flow Control (AFC) parameters. For first time, we couple Genetic Algorithms (GA) with an unsteady Reynolds-Averaged Navier-Stokes (RANS) solver using Spalart-Allmaras (SA) turbulence model to maximise lift and aerodynamic efficiency airfoil in stall conditions [1], then validate resulting set optimal Synthetic Jet Act...

Numerical simulations of time-periodic flows are an essential design tool for a wide range of engineered systems, including jet engines, wind turbines and flapping wings. Conventional solvers for time-periodic flows are limited in accuracy and efficiency by the low-order Finite Volume and time-marching methods they typically employ. These methods introduce significant numerical dissipation in t...

Computational Fluid Dynamics (CFD) simulations were performed to predict the interference drag produced by two streamlined struts intersecting at various angles in transonic flow since no relevant experimental data are available for use in design studies. The one-equation Spalart-Allmaras turbulence model was employed in a RANS formulation assuming fully-turbulent flow. Selected cases were run ...

Abstract Solving conjugate heat transfer design problems is relevant for various engineering applications requiring efficient thermal management. Heat exchange between fluid and solid can be enhanced by optimizing the system layout shape of flow channels. As transferred at fluid/solid interfaces, it crucial to accurately resolve geometry physics responses across these interfaces. To address thi...