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KSME International Journal

, Volume 14, Issue 4, pp 426–432 | Cite as

A new flame-stabilization technology for lean mixtures

  • Duck-Jool Kim
  • Gyung-Min Choi
Thermal Engineering · Fluid Engineering · Energy and Power Engineering

Abstract

The development of a low-pollution burner is important for saving energy and preserving the environment. A low-pollution burner can be produced by lean-mixture combustion and general combustion technology. The flammable limit of premixed flame is narrower than that of diffusion flame. Producing a lean mixture of fuel results in an effective combustion condition, which in turn produces high load and low pollution. In this study, it was found that the influx of Q2 had an effect on extending the lean flammable limits and flame stabilization in a doubled jet burner. And the flame, consisting of small eddies, can be stabilized by the nozzle neck phenomena.

Key Words

Low Pollution Lean Flammable Limit Flame Stabilization Nozzle Neck Phenomena Lean Mixture Combustion 

Nomenclature

C

Correlation coefficient

CH

CH band luminescence intensity

I

Ion current

OH

OH band luminescence intensity

P*

Dynamic pressure which is divided by the maximum value at each cross-section (dimensionless)

Q1

Flow rate of the unburned mixture in the inclination direction (10−3 m3/s)

Q2

Flow rate of unburned mixture in the central axis direction (10−3 m3/s)

R

Radial axis (mm)

THC

Total hydrocarbon concentration

X

Central axis (mm)

π

Time constant (mm)

Φo

Total applied equivalence ratio

Φ1

Applied equivalence ratio of the inclination direction mixture

Φ2

Applied equivalence ratio of the central

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Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2000

Authors and Affiliations

  1. 1.School of Mechanical EngineeringPusan National UniversityPusanKorea
  2. 2.Department of Mechanical EngineeringOsaka UniversityJapan

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