In this paper, a performance prediction method is proposed for the design of stratospheric propeller. The Spalart–Allmaras (S–A) model was used to calculate airfoil FX63, and polynomial fitting utilized establish database lift drag coefficient. A computational fluid dynamics (CFD) applied at different altitudes prove feasibility method. CFD results were compared with vortex theory prediction; r...

aerodynamic simulation of apds projectile with and without sabot has been conducted here. due to less weight of apds projectile in comparison with the projectile, with the same caliber, apds projectile has higher muzzle velocity, longer range, high penetration capability, and higher impact velocity. simulation of flow around the sabot walls has been carried out in two opening degrees of zero an...

Abstract An algebraic (zero-equation) transition model is developed to capture multiple mechanisms. The newly devised parameterized using “flow-structure-adaptive” variables and coupled with the truncated Spalart-Allmaras (SA) turbulence model. intermittency factor γ relies on “local flow information” directly linked “vorticity-based production” term of SA Splitting into lower higher regimes “f...

Three Reynolds-Stress Models (RSMs) have been benchmarked on industrial configurations with aeronautical applications. The models are first compared a zero-pressure-gradient boundary layer, which highlights the differences in near-wall approaches of models. Results then analyzed for Skåre & Krogstad adverse-pressure-gradient layer and Common Research Model (CRM) aircraft two Reynolds numbers. B...

This work presents a comparative study of Unsteady Reynolds–Averaged Navier–Stokes (URANS), Detached Eddy Simulations (DES) and Delayed (DDES) turbulence modeling approaches by performing numerical investigation with the ANSYS-FLUENT software package on full-scale model Jetstream 31 aircraft. The lift drag coefficients obtained from different models are compared flight test data, wind tunnel da...

To improve the calculation of the flow properties of an aerospike nozzle, different turbulence models were investigated in this study. The primary shape of the nozzle plug is determined through utilizing an approximate method. The flow field is, then, simulated using the Navier-Stokes equations for compressible flows. The commercial computational fluid dynamics code Fluent is used to simulate t...