Computational study of the effect of curvature on the transitional and turbulent regimes of axisymmetric boundary layers
Abstract
We propose to use the DNS and LES approaches to perform a fundamental study of the effects of curvature on axisymmetric boundary layers. The proposed problem involves a laminar axisymmetric boundary layer that is tripped by a trip wire and becomes fully developedover a zero-pressure gradient region of radius R1, and then experiences an adverse pressure gradient over an idealized stern. The stern has an elliptical cross-section with minor and major axes equal to R1 and R2. The elliptical geometry allows the adverse pressure gradient to be parametrized with only one additional parameter, R2 which can be varied such that the flow over the stern varies from attached to separated. Also, the ratio of transverse and streamwise curvatures steadily change as they do over a real stern. Therelevant non-dimensional parameters are Re#. h/#, #/R1, and R2/R1. A systematic study will be conducted of the transition, turbulent and stern regions. In addition to examining the underlying physics, the impact on RANS and WMLES strategies will be explored.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 12, 2023
- Source ID
- N000142312408
Entities
People
- Krishnan Mahesh
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy