文档介绍：Project Assignment #4
Transonic Effects on BWB Root Airfoil
Due: November 9 at the end of lab
Prof. David L. Darmofal
Department of Aeronautics and Astronautics
Massachusetts Institute of Technology
1 Objective
The objective of this Project Assignment is to determine the transonic effects on the wing root airfoil
section of the BWB using a two-pressible putational Fluid Dynamics
(CFD) method.
2 Two-dimensional Euler Solver
The two-dimensional Euler solver to be used for this assignment has been developed in the ACDL
and is called ProjectX. The most important aspect of the solver the you most keep in mind is that
you are using it to solve the 2-pressible Euler equations. As a result, you will not be able
to use it to estimate viscous drag contributions (. skin friction or pressure drag) nor will you be
able to use it to estimate three-dimensional effects (. induced drag). Any drag you find will be
due to one of two effects: (1) wave drag, or (2) discretization error. The discretization error arises
because we are finding an approximate solution to the Euler equations and in general this means
the CFD solution will have an error which tends to produce drag. The hope is that the drag due
to discretization error is small and that wave drag will dominate.
Instructions for using ProjectX are available on the MIT Server.
3 Required Tasks