Viscous-inviscid interactions in external aerodynamics
1987; Elsevier BV; Volume: 24; Issue: 2 Linguagem: Inglês
10.1016/0376-0421(87)90003-0
ISSN1873-1724
AutoresR. C. Lock, Brian R. Williams,
Tópico(s)Aerodynamics and Acoustics in Jet Flows
ResumoAfter a short introduction, Section 2 provides a physical background to the subject of viscous-inviscid interactions (VII). Section 3 covers the basic theoretical principles of interactive methods in two dimensions: generalisations of the concept of the displacement effect and the momentum integral equation; the effect of normal pressure gradients; matching conditions in the wake. The boundary conditions required for the equivalent inviscid flow (EIF) are then summarised, and the section concludes with a brief discussion of some relevant features of 'integral' and 'differential' methods for turbulent boundary layers. In Section 4 a similar, though necessarily incomplete, account is given of the corresponding treatment in three dimensions. Section 5 describes the principles of techniques for coupling the viscous and inviscid components of an interactive method; first in general principles and then in greater detail. In Section 6 a number of recent VII methods are reviewed and compared with experiment: first in two-dimensional incompressible flow (single and multiple aerofoils); then for aerofoils in transonic flow; an example of axisymmetric transonic flow; and finally methods for three-dimensional wings in transonic flow. The conclusions briefly summarise the current situation regarding the development of VII methods, and consider future possibilities in the subject.
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