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Low NOX combustion characteristics by hydrogen micro jet flame in cross flow

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Abstract

Many researches have been conducted on NOx reduction by micro jet combustion of hydrogen. In this study a can- type micro jet combustion with jet in cross flow (JICF) was proposed for low-pressure loss and NOx emission. The momentum ratio (J) of the micro fuel jet and air flow in JICF was changed to investigate micro flame stabilization. Recess length was also changed to know if the mixing time of the fuel jet and air is guaranteed. The results show that burner thermal efficiency was enhanced through simple can type burner with low pressure drop and the larger J tends to become more favorable condition for micro flame formation. And a stable micro flame can be established even at the low momentum ratio if enough mixing time is guaranteed. NOx data show that a can-type micro hydrogen burner with JICF configuration exhibits high potential for single-digit NOx emission.

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Abbreviations

J :

Momentum ratio

R :

Momentum flux ratio

\(\vec v\) :

Velocity vector

ρ :

Density

P :

Pressure

g :

Gravity force

F :

External body force

E :

Energy

h :

Enthalpy

J :

Diffusion flux

S :

Chemical reaction

Y :

Mass fraction

R :

Volumetric rate of creation species

RL :

Recess length

D :

Fuel hole diameter

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Acknowledgments

This work was supported by Research Program supported by the Incheon National University (International Cooperative) Research Grant in 2019.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Incheon National University, Incheon, 22012, Korea

    Chang-Hyun You, Ho-Yeon Lee & Sang-Soon Hwang

Authors
  1. Chang-Hyun You
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  2. Ho-Yeon Lee
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Corresponding author

Correspondence to Sang-Soon Hwang.

Additional information

Chang Hyun You is a M.S. of the School of Mechanical Engineering, Incheon National University, Incheon, Korea. He received his M.S. in Mechanical Engineering from Incheon National University. His research interests include hydrogen micro combustion and Computational Fluid Dynamics.

Ho Yeon Lee studied mechanical engineering and received his B.S. and Ph.D. from Incheon National University Mechanical Engineering from Incheon National University. His current research interests are MILD combustion using gas phase fuel, and nano particle flame synthesis.

Sang Soon Hwang studied aeronautical engineering and received his B.S., M.S. and Ph.D. from Seoul National University in 1981, 1983 and 1989, respectively. Since 1993, he is a Professor at the Incheon National University. His current research interests are flameless and MILD combustion of gas (methane and hydrogen) and liquid phase fuel for gas turbine combustor either industrial combustor also nano particle flame synthesis.

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You, CH., Lee, HY. & Hwang, SS. Low NOX combustion characteristics by hydrogen micro jet flame in cross flow. J Mech Sci Technol 37, 445–455 (2023). https://doi.org/10.1007/s12206-022-1242-z

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  • DOI: https://doi.org/10.1007/s12206-022-1242-z

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