Pressure reconstruction of a planar turbulent flow field with inner void areas of arbitrary boundary shapes
Abstract
(Approved for Public Release):The proposed research seeks to establish a much-needed PIV (particle image velocimetry) post-data processing capability for pressure reconstruction of a planar turbulent flow field with inner hollow areas of arbitrary boundary shapes(such a field is also known as a multiply- connected domain). With this capability, instantaneous pressure reconstruction of the flow field surrounding cavitation bubbles based on time-resolved PIV measurement will be made possible. Although the omni-directional method funded by ONR has been shown very successful in pressure reconstruction from PIV measurement in a continuous spatial domain, pressure reconstruction using omni-directional method for a domain with voids imbedded inside has not been attempted. The proposed project will fill the gap by upgrading the existing parallel ray omni-directional pressure reconstruction code with appropriate inner void boundary treatment, which, while preserving the natureof the parallel ray omni- directional pressure reconstruction at places with flow data, is capable of processing an arbitrary number of inner void areas with arbitrary shapes. The upgraded pressure reconstruction code (called parallel-ray-void) will be validated using the isotropic turbulence field available at the Johns Hopkins Turbulence Databases. Then, the code will be applied to processing planar PIV data with cavitation inception occurring on top of the trailing corner of an open cavity flow. The successful implementation of the pressure reconstruction code upgrade will pave the way for future experimental investigation of cavitation inception and growth mechanisms through detailed characterization of the quick dynamic changes in velocity and pressure fields surrounding cavitation voids.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112392
Entities
People
- Xiaofeng Liu
Organizations
- Office of Naval Research
- Salk Institute for Biological Studies
- United States Navy