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A TECHNIQUE FOR REAL-TIME MEASUREMENT OF FLOW TOPOLOGY IN TWO-PHASE SYSTEMS

Award Information

Agency:
Department of Energy
Branch:
N/A
Award ID:
11620
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
11620
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Potomac Research Inc.
10618 Tanager Lane Potomac, MD 20854
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1990
Title: A TECHNIQUE FOR REAL-TIME MEASUREMENT OF FLOW TOPOLOGY IN TWO-PHASE SYSTEMS
Agency: DOE
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

A THREE-DIMENSIONAL QUANTITATIVE DIELECTRIC IMAGING TECHNIQUE IS PROPOSED FOR MEASUREMENT OF VOID FRACTION, INTERFACIAL AREA, AND FLOW TOPOLOGY OF LIQUID TWO-PHASE FLOWS. WITH MICROWAVES AS PROBING RADIATION, IT MEASURES THE SCATTERING FIELDS USING AN ARRAY AND, THROUGH AN INVERSE SCATTERING PROCESS, RECONSTRUCTS THE DIELECTRIC PERMITTIVITY, BOTH REAL AND IMAGINARY PARTS, OF EVERY PIXEL OF THE FLOW BODY. FLOW PARAMETERS, SUCH AS VOID FRACTION AND INTERFACIAL AREA, ARE THEN COMPUTED BY A STATISTICAL SOFTWARE. THE TECHNIQUE IS EXPECTED TO YIELD A RESOLUTION LIMITED ONLY BY SIGNAL-TO-NOISE RATIO, AND NOT BY THE WAVELENGTH OR DIFFRACTION. WAVELENGTH PLACES A LIMIT ON RESOLUTION ONLY IN THE CASE WHERE SOME FAR-FIELD APPROXIMATION IS USED FOR THE SCATTERING FIELD. TO OVERCOME THE WAVELENGTH LIMITATION AND TO RETRIEVE ALL THREE DIMENSIONS OF THE TARGET PROFILE, OUR APPROACH IS TO CONVERT THE SCATTERING EQUATION TO A SCATTERING MATRIX FORM WITHOUT NEGLECTING HIGHER ORDER TERMS. IN ORDER TO STABILIZE THE MATRIX INVERSION, SCATTERING DATA IN THE NEAR ZONE ARE EMPLOYED AND A LEAST-MEAN-SQUARE ALGORITHM IS DEVISED.

Principal Investigator:


0

Business Contact:

Dr. wendy w. guo
PRESIDENT
3012797916
Small Business Information at Submission:

Potomac Research Inc
10618 Tanager Lane Potomac, MD 20854

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No