Coupled Euler/Integral Boundary Layer analysis in transonic flow
Abstract
A coupled Euler/Integral Boundary Layer method to analyze transonic flow over 2D and 3D configurations is presented. The inviscid method solves the time dependent Euler equations on a surface fitted grid using a finite volume time stepping Runge-Kutta scheme based on the work of Jameson. The integral boundary layer method is due to Wigton and is based on a version of Green's lag entrainment method. The boundary layer flow and the outer inviscid flow are coupled via Carter's scheme in 2D. The coupling schemes introduced by Carter and Le Balleur are generalized to handle 3D flows. In 2D, the surface pressures and the boundary layer parameters for an RAE 2822 airfoil at a rather severe transonic condition are compared to experimental data. In 3D, results from both the inviscid and coupled inviscid/boundary layer methods for a wing/body configuration are presented. The coupled solution at various conditions are compared to test data. It is concluded that the coupled Euler/Integral Boundary Layer procedure increases the range of conditions over which accurate and efficient solutions to flows about realistic configurations can be obtained. Inviscid Euler wing/body results are also presented to show the effects of convergence and grid factors on the inviscid solution.
- Publication:
-
American Institute of Aeronautics and Astronautics
- Pub Date:
- July 1983
- Bibcode:
- 1983apae.meet.....S
- Keywords:
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- Boundary Layer Equations;
- Computational Fluid Dynamics;
- Euler Equations Of Motion;
- Transonic Flow;
- Body-Wing Configurations;
- Inviscid Flow;
- Pressure Distribution;
- Runge-Kutta Method;
- Three Dimensional Flow;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer