Laser diagnostics in jets and flames
An integrated four component pulsed vibrational Raman scattering - one dimensional Laser Doppler Velocimeter scattering measurement system is applied to non-reacting and reacting free jet flows. Simultaneous, instantaneous, non-intrusive, remote, and at a point measurements of velocity, temperature and specie concentration - mean value, turbulent intensity and histogram distributions are shown. In addition, specie concentration second and third order scalar cross-correlation distributions are presented as a measure of specie mixing or unmixedness. It is found that many experimental parameters needed for theoretical flow modeling can be obtaind by this measurement system. A highly implicit numerical code was written and applied to model the non-reacting turbulent jet flow. Good agreement is shown between the numerical results and experimental measurements. The code is extended to model a premixed methane-air reacting free jet flow using a one-step global laminar Arrhenius rate chemical source term. It is found that agreement existed between the numerical solution and experimental measurements, but that refinements to the turbluent model and the use of a turbulent chemical source term are required to obtain better agreement.
- Research Organization:
- Polytechnic Inst. of New York, Farmingdale (USA)
- DOE Contract Number:
- AC01-78ET11056
- OSTI ID:
- 6285839
- Report Number(s):
- DOE/ET/11056-T4; ON: DE81027621
- Country of Publication:
- United States
- Language:
- English
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SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
COMBUSTION PRODUCTS
DOPPLER EFFECT
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLAMES
FLOW MODELS
FLUID FLOW
HYDROCARBONS
JETS
LASER SPECTROSCOPY
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METHANE
MOLECULE COLLISIONS
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NITROGEN
NONMETALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTON COLLISIONS
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PLASMA DIAGNOSTICS
RAMAN SPECTRA
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TEMPERATURE MONITORING
TURBULENT FLOW
VELOCIMETERS
VELOCITY
VIBRATIONAL STATES