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Record Details

Record 24 of 9866
Design of Fiber Optic Sensors for Measuring Hydrodynamic Parameters
Author and Affiliation:
Lyons, Donald R.(Hampton Univ., Dept. of Physics, VA United States)
Quiett, Carramah(Hampton Univ., Dept. of Physics, VA United States)
Griffin, DeVon [Technical Monitor]
Abstract: The science of optical hydrodynamics involves relating the optical properties to the fluid dynamic properties of a hydrodynamic system. Fiber-optic sensors are being designed for measuring the hydrodynamic parameters of various systems. As a flowing fluid makes an encounter with a flat surface, it forms a boundary layer near this surface. The region between the boundary layer and the flat plate contains information about parameters such as viscosity, compressibility, pressure, density, and velocity. An analytical model has been developed for examining the hydrodynamic parameters near the surface of a fiber-optic sensor. An analysis of the conservation of momentum, the continuity equation and the Navier-Stokes equation for compressible flow were used to develop expressions for the velocity and the density as a function of the distance along the flow and above the surface. When examining the flow near the surface, these expressions are used to estimate the sensitivity required to perform direct optical measurements and to derive the shear force for indirect optical measurements. The derivation of this result permits the incorporation of better design parameters for other fiber-based sensors. Future work includes analyzing the optical parametric designs of fiber-optic sensors, modeling sensors to utilize the parameters for hydrodynamics and applying different mixtures of hydrodynamic flow. Finally, the fabrication of fiber-optic sensors for hydrodynamic flow applications of the type described in this presentation could enhance aerospace, submarine, and medical technology.
Publication Date: Nov 01, 2001
Document ID:
20020018897
(Acquired Feb 15, 2002)
Subject Category: OPTICS
Report/Patent Number: P16
Document Type: Conference Paper
Publication Information: HBCUs/OMUs Research Conference Agenda and Abstracts; 24; (NASA/TM-2001-211289); (SEE 20020018881)
Financial Sponsor: NASA Glenn Research Center; Cleveland, OH United States
Organization Source: Hampton Univ.; Dept. of Physics; VA United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: FIBER OPTICS; HYDRODYNAMICS; COMPUTATIONAL FLUID DYNAMICS; COMPRESSIBLE FLOW; FLOW VELOCITY; OPTICAL MEASUREMENT; OPTICAL PROPERTIES; BOUNDARY LAYERS; FLAT PLATES; CONTINUITY EQUATION; NAVIER-STOKES EQUATION; MOMENTUM
Availability Notes: Abstract Only; Available from STI Support Services only as part of the entire parent document
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