Measurement of Temperature and Soot (KL) Distributions in Spray Flames of Diesel-Butanol Blends by Two-Color Method Using High-Speed RGB Video Camera Shanghai Jiao Tong University

Format:

Conference/Event

Author/Creator:

Shi, Shi, author.

Contributor:

Li, Tie

Wang, Bin

Zhang, Xiaoqing

Zheng, Ming

Conference Name:

SAE 2016 International Powertrains, Fuels & Lubricants Meeting (2016-10-24 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

Taking advantages of high speed RGB video cameras, the two-color method can be implemented with a relatively simple setup to obtain the temporal development of the two dimensional temperature and soot (KL) distributions in a reacting diesel jet. However, several issues such as the selection of the two wavelengths, the role of bandpass filters, and the proper optical settings, et cetera should be known to obtain a reliable measurement. This paper, at first, discusses about the uncertainties in the measurement of temperature and KL distributions in the diesel flame by the two-color method using the high speed RGB video camera. Since n-butanol, as an alternative renewable fuel, has the potential application in diesel engines, the characteristic of spray combustion of diesel-butanol blends under the diesel-like ambient conditions in a pre-burning constant-volume combustion chamber is studied. The Red and Blue channels of the high speed video camera are chosen for the two-color imaging because their response curve has a much smaller overlap. When adding the n-butanol into the neat diesel, the experimental result shows that the flame has a lower integral level for both flame temperature and soot density than neat diesel flame, owing to both increases in the fuel-borne oxygen and elongated ignition delays. In order to study the effect of LTC (Low Temperature Combustion), the ambient O2 concentration is set at four levels: 21%, 18%, 15% and 12%. The results show that with the decrease of O2 concentration, the flame temperature has a dropping tendency, while the KL (soot density) factor has a complicated behavior as a result of soot oxidation rate variation

Notes:

Vendor supplied data

Publisher Number:

2016-01-2190

Access Restriction:

Restricted for use by site license