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Session: PIV/PTV methods and applications I
Session starts: Wednesday 05 November, 10:20
Presentation starts: 10:40
Room: Lecture room B

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Alex-Mihai Dontu (TU Delft - Aerospace Engineering)
Fulvio Scarano (TU Delft - Aerospace Engineering)
Abbas Daliri (TU Delft - Aerospace Engineering)

Abstract:
A generalized technique for pressure reconstruction from PIV data is proposed that eliminates the need for user specified boundary conditions prior to pressure gradient integration. The method extends the dual model approach developed by Jux et. al. in 2020, which partitions the measurement domain into irrotational (IRR) and rotational (ROT) regions using the total pressure coefficient as a discriminant. The latter approach, however, suffers from dependence upon the initial choice of irrotational boundary conditions as well as the threshold value set for the total pressure coefficient. Here, partitioning of the flow domain is approached iteratively for a significant reduction of result sensitivity to the user choice of parameters. It is demonstrated that Iterative Domain Partitioning (IDP) reliably converges to define a boundary between IRR and ROT. The validity of the method is verified through comparisons with the state-of-the-art techniques applied to the steady flow over a NACA0015 airfoil at incidence. The results verify that IDP yields consistent results when varying the initial boundary conditions and the threshold of total pressure coefficient.