<p>The
aerodynamics of insect flight is not well understood despite it has been
extensively investigated with various techniques and methods. Its complexities
mainly have two folds: complex flow behavior and intricate wing morphology. The
complex flow behavior in insect flight are resulted from flow unsteadiness and
three-dimensional effects. However, most of the experimental studies on insect
flight were performed with 2D flow measurement techniques whereas the 3D flow
measurement techniques are still under developing. Even with the most advanced
3D flow measurement techniques, it is still impossible to measure the flow
field closed to the wings and body. On the other hand, the intricate wing
morphology complicates the experimental studies with mechanical flapping wings
and make mechanical models difficult to mimic the flapping wing motion of
insects. Therefore, to understand the authentic flow phenomena and associated
aerodynamics of insect flight, it is inevitable to study the actual flying
insects. </p>
<p>In
this thesis, a recently introduced technique of schlieren photography is first
tested on free jet of match rockets with a physics based optical flow method to
explore its potential of flow quantification of unsteady flow. Then the
schlieren photography and optical flow method are adapted to tethered and feely
flying houseflies to investigate the complex wake flow and structures. In the
end, a particle tracking velocimetry system: Shake the Box system, is utilized
to resolve the complex wake flow on a tethered house fly and to acquire some
preliminary 3D flow field data</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/14551029 |
| Date | 01 June 2021 |
| Creators | Angel David Lozano Galarza (10757814) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/EXPERIMENTAL_STUDIES_ON_FREE_JET_OF_MATCH_ROCKETS_AND_UNSTEADY_FLOW_OF_HOUSEFLIES/14551029 |
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