Application of a robust β-pdf treatment to analysis of thermal NO formation in nonpremixed hydrogen-air flame

Ching Shun Chen, Keh-Chin Chang, Jyh Yuan Chen

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The assumed β-pdf is widely used in turbulent flame simulation with the moment closure method. However, implementation of the β-pdf in turbulent flame simulation may sometimes encounter singularity difficulties in numerical calculation. The study proposes a robust β-pdf treatment to overcome these numerical difficulties. The proposed β-pdf treatment associated with the partial equilibrium chemistry model and the k-ε{lunate} turbulence model is firstly applied to the case of H2/N2-air nonpremixed flame to demonstrate its robustness. Then, the present method is applied to the study of thermal NO formation in H2-air nonpremixed flames. Comparison of results shows the present model to be capable of yielding fair agreement with the measurements. It is competitive with other more sophisticated methods, such as the pdf evolution method and the conditional moment closure method.

Original languageEnglish
Pages (from-to)375-390
Number of pages16
JournalCombustion and Flame
Volume98
Issue number4
DOIs
Publication statusPublished - 1994 Jan 1

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turbulent flames
closures
Hydrogen
flames
moments
air
turbulence models
hydrogen
Air
Turbulence models
encounters
simulation
chemistry
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

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abstract = "The assumed β-pdf is widely used in turbulent flame simulation with the moment closure method. However, implementation of the β-pdf in turbulent flame simulation may sometimes encounter singularity difficulties in numerical calculation. The study proposes a robust β-pdf treatment to overcome these numerical difficulties. The proposed β-pdf treatment associated with the partial equilibrium chemistry model and the k-ε{lunate} turbulence model is firstly applied to the case of H2/N2-air nonpremixed flame to demonstrate its robustness. Then, the present method is applied to the study of thermal NO formation in H2-air nonpremixed flames. Comparison of results shows the present model to be capable of yielding fair agreement with the measurements. It is competitive with other more sophisticated methods, such as the pdf evolution method and the conditional moment closure method.",
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Application of a robust β-pdf treatment to analysis of thermal NO formation in nonpremixed hydrogen-air flame. / Chen, Ching Shun; Chang, Keh-Chin; Chen, Jyh Yuan.

In: Combustion and Flame, Vol. 98, No. 4, 01.01.1994, p. 375-390.

Research output: Contribution to journalArticle

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