Adelaide Research and Scholarship
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|Title: ||Prediction and delay of 2D-laminar boundary layer separation near leading edges.|
|Author: ||Dostovalova, Anna|
|Issue Date: ||2002|
|School/Discipline: ||School of Mathematical Sciences|
|Abstract: ||Boundary-layer flows near leading edges of generally
curved obstacles have been studied for a long time.
Apart from having many practical applications, the
theory and approaches prevailing in this area
stimulate development of a variety of computational tools
and form a ground for testing them.
The specific aim of this work is to study two-dimensional
laminar boundary layer flows near the leading edges of airfoils
and other elongated bodies, and to explore geometries for which
boundary layer separation can be avoided. This class of problems
is relevant to optimal design of wings, aircraft and projectile
noses, laminar flow control methods and adaptive wing technology.
One of the findings of this work suggests that local modifications
to parabolic wing noses can yield up to 11% increase in the
unseparated angle of attack. Another result obtained here is the
set of shortest possible generalised elliptic noses of long symmetric
bodies which allow unseparated flow.
Methods adopted in this work are based on the combined use of numerically
solved Prandtl equations written in Gortler variables, and inviscid
solutions obtained semi-analytically by the conformal mapping method.
The resulting technique being reliable, fast and computationally inexpensive,
can complement or test the results obtained using a comprehensive CFD approach.|
|Advisor: ||Tuck, E. O.|
|Dissertation Note: ||Thesis (Ph.D.)--School of Mathematical Sciences, 2002.|
|Keywords: ||Boundary-layer flows, leading edges, airfoils, laminar boundary layer mathematical models|
|Appears in Collections:||Research Theses|
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