Laser-Induced Phosphorescence and the Impact of Phosphor Coating Thickness on Crank-Angle Resolved Cylinder Wall Temperatures

Christoph Knappe*, Peter Andersson, Martin Algotsson, Mattias Richter, Johannes Linden, Marcus Alden, Martin Tuner, Bengt Johansson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

In order to further improve the energy conversion efficiency in reciprocating engines, detailed knowledge about the involved processes is required. One major loss source in internal combustion engines is heat loss through the cylinder walls. In order to increase the understanding of heat transfer processes and to validate and generate new heat transfer correlation models it is desirable, or even necessary, to have crank-angle resolved data on in-cylinder wall temperature. Laser-Induced Phosphorescence has proved to be a useful tool for surface thermometry also in such harsh environments as running engines. However, the ceramic structure of most phosphor coatings might introduce an error, due to its thermal insulation properties, when being exposed to rapidly changing temperatures. In this article the measurement technique is evaluated concerning the impact from the thickness of the phosphorescent layer on the measured temperature. Experiments with different layer thicknesses are performed both during motored and fired operation of a HCCI engine. The results reveal a need for caution when applying the technique for in-cylinder measurements.

Original languageEnglish (US)
Pages (from-to)1689-1698
Number of pages10
JournalSAE International Journal of Engines
Volume4
Issue number1
DOIs
StatePublished - Apr 1 2011

ASJC Scopus subject areas

  • Automotive Engineering
  • Fuel Technology

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