PARAMETRIC MODELING FOR SHAPE OPTIMIZATION
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Date
2017-01
Authors
Bocharov, Sergey
Journal Title
Journal ISSN
Volume Title
Publisher
Nazarbayev University School of Engineering and Digital Sciences
Abstract
Shape optimization has become a necessity in our pursuit for performance
and efficiency in highly competitive fields ranging from engineering and science
and finishing to medicine and agriculture. This plethora of shape-related
problems gives rise to the requirement of flexible and generic frameworks that
can address a wide series of problems. In our work, we closely examine the
development of such a framework for the case of fluid flows around airfoils but
we implement it in a way that would allow the extension of our approach to
different areas of application. Commercial software packages like Solidworks or
Ansys offer an advanced modeling and analysis environment but they do not
come up with the required flexibility and customization capability demanded in
our endeavor. On the other hand, the open source software package like
OpenFOAM coupled with Matlab proved to be an efficient combination for our
purposes. As a benchmark case for the framework, airfoil shapes are optimized
at a single-point operating condition with fixed flow parameters. The Matlab's
implementations for constrained nonlinear optimization drive the shape
optimization process in our framework. The parametric model is based on the
NURBS curve representation and the resulting airfoil instances are generated
with the aid of eight parameters. Airfoil's performance is evaluated via
appropriate flow analysis solvers for the selected range of applications. The
framework's capabilities are demonstrated in the optimization of a given airfoil
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shape with respect to its lift coefficient. Specifically, a 4% increase is attained
for the lift coefficient while the shape parameters are constrained to deviate up to
0.5% from the initial values.
Description
Keywords
Shape optimization
Citation
Sergey Bocharov; 2017; PARAMETRIC MODELING FOR SHAPE OPTIMIZATION; School of Engineering. Department of Mechanical Engineering. Nazarbayev University; http://nur.nu.edu.kz/handle/123456789/2300