TY - GEN
T1 - Experimental measurements of turbulent junction flow using high speed stereo PIV and IR thermography
AU - Elahi, Syed S.
AU - Lange, Eric A.
AU - Lynch, Stephen P.
N1 - Funding Information:
The authors would like to acknowledge assistance from Phil Irwin and Zachary Moul from Penn State University. This work was sponsored by the Office of Naval Research, ONR, under grant number N00014-15-1-2764; the views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Office of Naval Research, the U.S. Navy or the U.S. government
Publisher Copyright:
© 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Turbulent junction flow is commonly seen in various turbomachinery components, heat exchangers, submarine appendages, and wing-fuselage attachments, where the approach boundary layer separates and rolls up into a coherent system of vortices upstream of a bluff body. The highly unsteady behavior of this flow causes high pressure fluctuations on the wall, and if the fluid temperature is different than the wall temperature, also causes high heat transfer. One of the signature features of these flows is a bimodal distribution of velocity around the vortex system. In this paper, the flow physics as well as heat transfer of the turbulent junction flow are investigated using PIV and IR measurements respectively. Among the three objectives of this paper, the first one is to demonstrate the unique experimental setup that captures temporally resolved turbulent flow-field measurements. The second objective is to analyze the dynamics of primary vortex for various Reynolds numbers. The final objective is to investigate the effect of the unsteady junction flow on the endwall heat transfer.
AB - Turbulent junction flow is commonly seen in various turbomachinery components, heat exchangers, submarine appendages, and wing-fuselage attachments, where the approach boundary layer separates and rolls up into a coherent system of vortices upstream of a bluff body. The highly unsteady behavior of this flow causes high pressure fluctuations on the wall, and if the fluid temperature is different than the wall temperature, also causes high heat transfer. One of the signature features of these flows is a bimodal distribution of velocity around the vortex system. In this paper, the flow physics as well as heat transfer of the turbulent junction flow are investigated using PIV and IR measurements respectively. Among the three objectives of this paper, the first one is to demonstrate the unique experimental setup that captures temporally resolved turbulent flow-field measurements. The second objective is to analyze the dynamics of primary vortex for various Reynolds numbers. The final objective is to investigate the effect of the unsteady junction flow on the endwall heat transfer.
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U2 - 10.2514/6.2017-3303
DO - 10.2514/6.2017-3303
M3 - Conference contribution
AN - SCOPUS:85088062957
SN - 9781624105005
T3 - 47th AIAA Fluid Dynamics Conference, 2017
BT - 47th AIAA Fluid Dynamics Conference, 2017
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 47th AIAA Fluid Dynamics Conference, 2017
Y2 - 5 June 2017 through 9 June 2017
ER -