In this paper we present a unigrid multi–model formulation for transonic flow calculations based on solving, in sequence, the full potential equation and the the Euler equations. The goal is to minimize the overall computation time to simulate steady flows by using a more computational efficient physical model in the early iteration steps. The proposed method is based on two steps. In the first...

Large eddy simulations are performed to study tonal noise generation by a NACA0012 airfoil for Reynolds numbers in the range $0.5\ifmmode\times\else\texttimes\fi{}{10}^{5}\ensuremath{\le}R\phantom{\rule{0}{0ex}}e\ensuremath{\le}4\ifmmode\times\else\texttimes\fi{}{10}^{5}$. Different flow patterns responsible originate from laminar separation bubbles over surface. Intermittency and transition tu...

<p>Airfoil telah mengalami banyak perkembangan dan optimalisasi melalui berbagai cara. Terdapat teknik yang dapat digunakan untuk memodifikasi bentuk arifoil standar ada saat ini. Metode PARSEC merupakan salah satu parameterisasi paling airfoil. Paper ini menyediakan penjelasan komprehensif.mengenai implementasi metode pada bahasa pemrograman <em>python</em>. Studi menggunakan...

This paper studies the impact of installing noise-suppressing deflector vanes in the bypass flow on the aerodynamic performance of the dual-stream supersonic nozzle of a turbofan engine by using a three-dimensional Reynolds-averaged Navier-Stokes computer program. A series of nozzle configurations using a single pair or double pairs of vanes with NACA0012, NACA4412, and NACA7514 airfoil profile...

Simulations of the interaction between a vortex and a NACA0012 airfoil are performed with a stable, high-order accurate (in space and time), multi-block finite-difference solver for the compressible NavierStokes Equations. We begin by computing a benchmark test case to validate the code. Next, the flow with steady inflow conditions are computed on several different grids. The resolution of the ...

In this article we discuss the application of a Lagrange multiplier based ®ctitious domain method to the numerical simulation of incompressible viscous ̄ow modeled by the Navier±Stokes equations around moving rigid bodies; the rigid body motion is due to hydrodynamical forces and gravity. The solution method combines ®nite element approximations, time discretization by operators splitting and c...