| Project/Area Number |
15560169
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Gunma University |
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Principal Investigator |
AMAGAI Kenji Gunma University, Dept.of Mechanical System Engineering, Associate Professor, 工学部, 助教授 (20221731)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
|
| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2003: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | Laser measurement technique / Laser induced fluorescence / Fluorescence spectrum / Spectroscopic analysis / Polycyclic aromatic hydrocarbons / Soot particles / Combustion / Nano-PM |
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| Research Abstract |
Laser induced fluorescence(LIF) method for the measurement of PAHs(Polycyclic Aromatic Hydrocarbons) in diffusion flames was developed. A KrF excimer laser and a dye-laser pumped by a XeF excimer laser were used to excite the PAHs molecules. Two-dimensional images of PAHs concentrations in the flame could be obtained by using the temporally resolved LIF method. From the data of emission spectra of PAH vapors, it was found that the peak wavelength in the emission spectrum of LIF shifted to the longer wavelength side with an increase of PAH carbon numbers. By using of this data, carbon numbers of PAH in a diffusion flame was presumed. It was confirmed that the carbon numbers of PAHs in the diffusion flame increased with approaching to the flame surface. The maximum carbon number was about 26 at the layer close to the flame surface of laminar diffusion flames.
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