| Download | - View final version: Measurements of soot volume fraction under conditions relevant to engine exhaust using four-colour LII and different laser energies (PDF, 369 KiB)
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| Link | https://ceur-ws.org/Vol-865/LiuColdSoot.pdf |
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| Author | Search for: Liu, Fengshan1ORCID identifier: https://orcid.org/0000-0002-1790-6381; Search for: He, Xu; Search for: Li, Hongmei; Search for: Liu, Fushui; Search for: Smallwood, Gregory J.1ORCID identifier: https://orcid.org/0000-0002-6602-1926 |
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| Affiliation | - National Research Council Canada. Measurement Science and Standards
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| Format | Text, Poster |
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| Conference | 5th International Workshop on Laser-induced Incandescence (Lii 2012), May 8-11, 2012, Le Touquet, France |
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| Physical description | 1 p. |
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| Abstract | Available experimental evidence shows that the apparent soot volume fraction (SVF) determined from two-colour LII (at 450 and 780 nm) for soot initially at near ambient room temperature displays a laser fluence dependence: it first increases with increasing the laser fluence until it reaches a maximum, after which it decreases with further increasing in laser fluence, due to sublimation. It is suggested that the low-fluence SVF anomaly is attributed to changes in soot emissivity in the 350 to 500 nm spectral range as a result of evaporation of condensed volatile organic compounds from soot particle surfaces due to laser heating. However, there is currently a lack of direct evidence to confirm the cause of the low fluence anomaly and a lack of detection strategy on how to avoid the low fluence SVF anomaly. The current approach using the two-colour LII technique is to operate the laser fluence around 2.1 mJ/mmâ‚‚ with a 1064 nm laser, see Fig. 1. |
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| Publication date | 2012-05 |
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| Publisher | CEUR-WS.org |
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| In | |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 5c82c82f-d63c-40d7-9609-35389ea42223 |
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| Record created | 2024-10-07 |
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| Record modified | 2024-10-07 |
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