TY - GEN
T1 - Effects of upstream body on pitching trapezoidal panel
AU - Brooks, Seth A.
AU - Green, Melissa A.
N1 - Publisher Copyright:
© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2019
Y1 - 2019
N2 - To understand the effects of an upstream body on the wake characteristics of an oscillating propulsor, volumetric reconstructions of phase-averaged velocity field measurements were collected and analyzed. Two experiments were conducted and their results were compared using using qualitative wake characterization. Both datasets had a pitching frequency of 1 Hz, a maximum pitching angle of ±15◦, and a resulting Strouhal number of 0.37. The Strouhal number was selected for comparison with existing data from a similar experiment. In the previous experiment, an isolated, rigid, trapezoidal panel was pitched about its leading edge. The current work uses the same panel and motion as the first with the addition of an upstream, stationary idealized fish-like body. Together these datasets suggest that a stationary, upstream body does not significantly affect the large-scale wake deformation phenomena, including transverse expansion and spanwise compression. The addition of the upstream body did affect the presence of small-scale structures that are present in the isolated panel case but not in the upstream body case. It is also shown that the upstream body potentially reduces the net thrust produced by the system.
AB - To understand the effects of an upstream body on the wake characteristics of an oscillating propulsor, volumetric reconstructions of phase-averaged velocity field measurements were collected and analyzed. Two experiments were conducted and their results were compared using using qualitative wake characterization. Both datasets had a pitching frequency of 1 Hz, a maximum pitching angle of ±15◦, and a resulting Strouhal number of 0.37. The Strouhal number was selected for comparison with existing data from a similar experiment. In the previous experiment, an isolated, rigid, trapezoidal panel was pitched about its leading edge. The current work uses the same panel and motion as the first with the addition of an upstream, stationary idealized fish-like body. Together these datasets suggest that a stationary, upstream body does not significantly affect the large-scale wake deformation phenomena, including transverse expansion and spanwise compression. The addition of the upstream body did affect the presence of small-scale structures that are present in the isolated panel case but not in the upstream body case. It is also shown that the upstream body potentially reduces the net thrust produced by the system.
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U2 - 10.2514/6.2019-3429
DO - 10.2514/6.2019-3429
M3 - Conference contribution
AN - SCOPUS:85099482097
SN - 9781624105890
T3 - AIAA Aviation 2019 Forum
SP - 1
EP - 9
BT - AIAA Aviation 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Aviation 2019 Forum
Y2 - 17 June 2019 through 21 June 2019
ER -