Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Thickness dependent variations in surface phosphor thermometry during transient combustion in an HCCI engine

In English

Författare

Summary, in English

Phosphor thermometry is a semi-invasive measurement technique which is commonly used for temperature determination in combustion applications. Surface temperature measurements using thermographic phosphors rely on the assumption that the phosphor layer is thin enough in order to adopt the surface temperature non-intrusively. This work compares the temperature information, recorded from two opposing sides of phosphor films, coated on a translucent part of the combustion chamber wall inside a car engine. The film thickness was varied between 5 and 72 mu m and two different phosphors were studied; CdWO4 and La2O2S:Eu. For both phosphors, the results showed no significant differences. Being subject to unsteady heat transfer during fired engine operation, phosphor coatings above 20 mu m in thickness experienced a significant temperature gradient between the front- and the backside of the coating, whereas thinner layers did not seem to be affected within the limits of measurement accuracy and precision. Cycle-to-cycle variations of the global gas temperature were not found to correlate with phosphor temperature variations. However, a strong temperature correlation between opposite sides of the phosphor coating was observed for film thicknesses below 20 mu m during engine cycle-to-cycle variations. (C) 2013 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Publiceringsår

2013

Språk

Engelska

Sidor

1466-1475

Publikation/Tidskrift/Serie

Combustion and Flame

Volym

160

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Other Mechanical Engineering
  • Atom and Molecular Physics and Optics

Nyckelord

  • Laser-induced phosphorescence
  • Thermographic phosphor
  • Surface
  • thermometry
  • Film thickness
  • Thermal boundary layer
  • Internal combustion
  • engine

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0010-2180