Title page for ETD etd-0428103-215650

Document Type thesis

Author Name Paci, Paolo

Email Address paolo.paci at dappolonia.it

URN etd-0428103-215650

Title Monitoring Vapor Phase Concentration in Supersonic Flows

Degree MS

Department Chemical Engineering

Advisors
Barbara E. Wyslouzil, Advisor
Ravindra Datta, Department Head

Keywords
infrared spectroscopy
aerosols
nucleation
Tunable Diode Laser
condensation
supersonic nozzles

Date of Presentation/Defense 2003-02-04

Availability unrestricted

Abstract
This work discusses the development of a compact Tunable Diode Laser Absorption Spectrometer (TDLAS) for gas phase mixing ratio and temperature measurements of condensible vapors, in particular H2O and D2O, in supersonic flows.
Through extensive pressure trace measurements and mass balances on the incoming species, the expected mixing ratio and temperature profiles of the condensible species along the supersonic nozzle have been characterized.
Using a Tunable Diode Infrared laser operating in the 8 microns region, the possibility of nonintrusively measuring the gas phase mixing ratio and the temperature (even simultaneously) in a supersonic nozzle is demonstrated.
The acquired spectroscopic data and the pressure trace measurements are compared and the results suggest the possibility to improve the instrument set-up and to improve the quality of the measurements. Also, the interpretation of our initial experimental results and the comparison with the pressure traces measurements suggest reasons to further investigate the condensation behavior of D2O and H2O.

Files
ppaci.pdf

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Document Type	thesis
Author Name	Paci, Paolo
Email Address	paolo.paci at dappolonia.it
URN	etd-0428103-215650
Title	Monitoring Vapor Phase Concentration in Supersonic Flows
Degree	MS
Department	Chemical Engineering
Advisors	Barbara E. Wyslouzil, Advisor Ravindra Datta, Department Head
Keywords	infrared spectroscopy aerosols nucleation Tunable Diode Laser condensation supersonic nozzles
Date of Presentation/Defense	2003-02-04
Availability	unrestricted
Abstract This work discusses the development of a compact Tunable Diode Laser Absorption Spectrometer (TDLAS) for gas phase mixing ratio and temperature measurements of condensible vapors, in particular H2O and D2O, in supersonic flows. Through extensive pressure trace measurements and mass balances on the incoming species, the expected mixing ratio and temperature profiles of the condensible species along the supersonic nozzle have been characterized. Using a Tunable Diode Infrared laser operating in the 8 microns region, the possibility of nonintrusively measuring the gas phase mixing ratio and the temperature (even simultaneously) in a supersonic nozzle is demonstrated. The acquired spectroscopic data and the pressure trace measurements are compared and the results suggest the possibility to improve the instrument set-up and to improve the quality of the measurements. Also, the interpretation of our initial experimental results and the comparison with the pressure traces measurements suggest reasons to further investigate the condensation behavior of D2O and H2O.
Files	ppaci.pdf