Unsteady transonic flow past airfoils in rigid-body motion. [UFLO5]

Technical Report · Sun Mar 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6571749· OSTI ID:6571749

Chang, I C

With the aim of developing a fast and accurate computer code for predicting the aerodynamic forces needed for a flutter analysis, some basic concepts in computational transonics are reviewed. The unsteady transonic flow past airfoils in rigid body motion is adequately described by the potential flow equation as long as the boundary layer remains attached. The two dimensional unsteady transonic potential flow equation in quasilinear form with first order radiation boundary conditions is solved by an alternating direction implicit scheme in an airfoil attached sheared parabolic coordinate system. Numerical experiments show that the scheme is very stable and is able to resolve the higher nonlinear transonic effects for filter analysis within the context of an inviscid theory.

• Research Organization: New York Univ., NY (USA). Courant Mathematics and Computing Lab.
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76ER03077
• OSTI ID: 6571749
• Report Number(s): DOE/ER-03077-170
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
AERODYNAMICS
AIRFOILS
BOUNDARY LAYERS
COMPUTER CALCULATIONS
COMPUTER CODES
FINITE DIFFERENCE METHOD
FLUID FLOW
FLUID MECHANICS
ITERATIVE METHODS
LAYERS
MATHEMATICAL MODELS
MECHANICS
NUMERICAL SOLUTION
TRANSONIC FLOW
U CODES
UNSTEADY FLOW