FLEET velocimetry for aerodynamics

PM Danehy, RA Burns, DT Reese… - Annual Review of …, 2022 - annualreviews.org
Long-lasting emission from femtosecond excitation of nitrogen-based flows shows promise
as a useful mechanism for a molecular tagging velocimetry instrument. The technique …

[HTML][HTML] Non-intrusive flow diagnostics for unsteady inlet flow distortion measurements in novel aircraft architectures

U Doll, M Migliorini, J Baikie, PK Zachos, I Röhle… - Progress in Aerospace …, 2022 - Elsevier
Inlet flow distortion is expected to play a major role in future aircraft architectures where
complex air induction systems are required to couple the engine with the airframe. The …

Numerical investigation on the tracer followability of nitrogen droplets over the airfoil in cryogenic wind tunnel

J Hou, R Gao, X Xiao, J Xie, J Chen - International Communications in Heat …, 2024 - Elsevier
Cryogenic wind tunnels (CWT) achieve high Reynolds number aerodynamic performance
measurements by cooling the medium with liquid nitrogen. Utilization of naturally-occurring …

Velocity Measurements in the Wake of the Swept Wing Flow Test Model at the National Transonic Facility

J Gao, OK Tyrrell, PM Danehy, DT Chan - AIAA SCITECH 2025 Forum, 2025 - arc.aiaa.org
Femtosecond laser electronic excitation tagging (FLEET) was applied to obtain flowfield
velocity data for the Swept Wing Flow Test (SWiFT) at the NASA Langley Research Center …

High Reynolds Number Testing of the NATO AVT-298 SWiFT Configuration at the National Transonic Facility

DT Chan, AE Washburn, S Langston, B Moran… - AIAA SCITECH 2025 …, 2025 - arc.aiaa.org
A high Reynolds number wind tunnel test of the NATO AVT-298 Swept Wing Flow Test
(SWiFT) configuration was conducted in the National Transonic Facility at the NASA Langley …

Hypersonic FLEET Velocimetry on a Three-Dimensional Expansion-Compression Geometry

DW Carter, JC Pehrson, R Bhakta, R Spillers… - AIAA SCITECH 2025 …, 2025 - arc.aiaa.org
We present results of femtosecond laser electronic excitation tagging (FLEET) velocimetry
applied to a three-dimensional expansion-compression geometry in the Sandia hypersonic …

高超声速流场激光测速技术研究进展

栗继伟, 罗凯, 尚甲豪, 王业军, 汪球, 赵伟 - 力学学报, 2023 - lxxb.cstam.org.cn
高超声速气流条件下飞行器内/外部流动中存在强湍流及脉动, 边界层转捩, 激波-
边界层干扰和高温真实气体效应等耦合效应, 表征该非定常流动现象对飞行器气动力 …

Density measurement of supersonic airflow using decay characteristics of FLEET emission

W Yamaguchi, Y Sugioka, S Koike, T Handa - Experiments in Fluids, 2023 - Springer
A method that involves the use of a femtosecond laser can be utilized for nonintrusive
measurement of supersonic airflow without seeding any additional molecules. In the present …

Self-Aligned Focusing Schlieren at the 0.3-M Transonic Cryogenic Tunnel and the National Transonic Facility

JM Weisberger, BF Bathel, PM Danehy… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
The implementation of a self-aligned focusing schlieren (SAFS) system at two cryogenic
wind tunnels at NASA Langley Research Center is discussed. Risk-reduction testing of the …

Tomographic FLEET with a wedge array for multi-point three-component velocimetry

D Richardson, Y Zhang, SJ Beresh - Optics Letters, 2024 - opg.optica.org
Femtosecond laser electronic excitation tagging (FLEET) velocimetry is an important
diagnostic technique for seedless velocimetry measurements particularly in supersonic and …