Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L21: Experimental Techniques: Pressure, Density, Temperature and Concentration
4:05 PM–6:28 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B309
Chair: Michael Hargather, New Mexico Institute of Mining and Technology
Abstract ID: BAPS.2018.DFD.L21.5
Abstract: L21.00005 : Towards Pressure Measurements Using Filtered Rayleigh Scattering*
4:57 PM–5:10 PM
Presenter:
David Feng
(Princeton University)
Authors:
David Feng
(Princeton University)
Benjamin M. Goldberg
(Princeton University)
Mikhail N. Shneider
(Princeton University)
Richard B. Miles
(Texas A&M University, Princeton University)
Nonintrusive laser diagnostics are critical for the measurement of pressure, temperature, density, and velocity in a variety of aerospace and combustion applications. One of these diagnostics, filtered Rayleigh scattering (FRS), has been shown to be a useful in this regard. The primary advantage of FRS is that 1) it does not require particle seeding and 2) background scattering is strongly suppressed by the molecular vapor filter employed. Furthermore, the filter properties and collection angle can be adjusted such that the dependence on the thermal broadening of the Rayleigh scattering can be removed, thus making the signal proportional only to pressure via the ideal equation of state. We present a model of FRS for temperature insensitivity and pressure sensitivity with experimental results on the temperature insensitivity capabilities. Temperature insensitivity from 300-500 K is demonstrated in air, and a reduction in temperature sensitivity is demonstrated for a Hencken methane/air flame at ~1800 K by changing the observational angle and filter vapor pressure. Modelling of pressure shows that the pressure dependence of the FRS signal remains linear in these regimes.
*The authors would like to acknowledge the AFOSR for grant support under Dr. Chiping Li.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L21.5
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700