Heat flux mapping of oxyacetylene flames and their use to characterise Cf-HfB2 composites

A. Paul, J. G P Binner, B. Vaidhyanathan, A. C J Heaton, P. M. Brown

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Cost effective and fast ultra-high-temperature testing methods such as oxyacetylene torch testing are extremely useful for the rapid screening of ultra-high-temperature ceramic (UHTC) materials for hypersonic applications. There is no report in the literature, however, of an organised study to measure the heat flux and how it varies with gas flow rate, gas flow ratio and distance from the nozzle tip for an oxyacetylene flame. In this paper, the authors report for the first time the heat flux mapping of an oxidising, neutral and reducing flame. The measured heat flux was as high as ∼17 MW m-2 at a distance of 10 mm from the nozzle, which is much higher than that previously reported in the literature. Torch testing was carried out for Cf-HfB2 UHTC composites at this heat flux and the results are presented along with detailed microstructural characterisation.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalAdvances in Applied Ceramics
Volume115
Issue number3
DOIs
Publication statusPublished - 9 Feb 2016

Keywords

  • Ablation
  • Heat flux
  • Oxyacetylene
  • Ultra-high-temperature ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Industrial and Manufacturing Engineering

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