Phase I - PLANAR VISUALIZATION AND VAPOR AND LIQUID IN A SPRAY PLUME
- Energy Research Consultants
This report summarizes Energy Research Consultants’ (ERC’s) efforts on the DOE Phase I SBIR topic Planar Visualization of Vapor and Liquid in a Spray Plume. An absorption and scattering based diagnostic to measure fuel vapor in the presence of fuel droplets was assembled and demonstrated. Two laser wavelengths pairs are used collocated in space on top of each other. One wavelength is absorbed by the fuel vapor. Since the vapor absorbing wavelength is also attenuated by liquid fuel drops, this attenuation due to the liquid can be removed by using a second wavelength that is attenuated by liquid fuel drops but not absorbed by fuel vapor. The significant advantage of using absorption (vs scattering or fluorescence) to measure vapor are that many of the confounding challenges associated with multiple scattering, incident beam attenuation, and signal attenuation by the spray are completely avoided. The spray density is only limited by the ability of some reasonable level of light (as little as ~1-5%) to pass through it. Choosing wavelength pairs that are as close as possible is important to minimize error. Two pairs of wavelengths in the 3-4 micron range were examined in this project to measure fuel vapor. Gaseous temperature measurements were also demonstrated with two wavelengths near 1.5 microns. Line of sight integrated measurements were made and transformed in spatially resolved planar measurements using tomographic techniques. The line of sight nature of these measurements requires minimal optical access, which may not be the case with other techniques. Automotive type injectors were used in these demonstrations along with 87 octane gasoline as the test liquid. The multicomponent fuel was chosen due to its practical transportation use throughout the US and the world. Other techniques may require a single component fuel, limiting the practical application of other techniques. Care was taken to compare the absorption scattering technique to other techniques to confirm its accuracy.
- Research Organization:
- Energy Research Consultants
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- DOE Contract Number:
- SC0011961
- OSTI ID:
- 1580436
- Type / Phase:
- SBIR (Phase I)
- Report Number(s):
- ERC-SB6-14-1(a)
- Country of Publication:
- United States
- Language:
- English
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