Hypersonic N2 boundary layer flow velocity profile measurements using FLEET
Abstract
Femtosecond laser electronic excitation tagging (FLEET) velocimetry was used in the boundary layer of an ogive-cylinder model in a Mach-6 Ludwieg tube. One-dimensional velocity profiles were extracted from the FLEET signal in laminar boundary layers from pure N 2 flows at unit Reynolds numbers ranging from 3.4 × 10 6 / m to 3.9 × 10 6 / m . The effects of model tip bluntness and the unit Reynolds number on the velocity profiles were investigated. The challenges and strategies of applying FLEET for direct boundary layer velocity measurement are discussed. The potential of utilizing FLEET velocimetry for understanding the dynamics of laminar and turbulent boundary layers in hypersonic flows is demonstrated.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 05, 2021
- Source ID
- 10.1364/ao.417470
Entities
People
- Jonathan L. Hill
- Levi Thomas
- Mark F. Reeder
- Matthew Borg
- Naibo Jiang
- Paul Hsu
- Stephen A. Schumaker
- Stephen W. Grib
- Sukesh Roy
Organizations
- Air Force Institute of Technology
- Air Force Office of Scientific Research
- Air Force Research Laboratory