scholarly journals Effects of radiation heat loss on laminar premixed ammonia/air flames

2019 ◽  
Vol 37 (2) ◽  
pp. 1741-1748 ◽  
Author(s):  
Hisashi Nakamura ◽  
Mitsumasa Shindo
Keyword(s):  
Heat Loss ◽  
Radiation Heat ◽  
Radiation Heat Loss ◽  
Effects Of Radiation

A Study of the Effects of Radiation on Pollutant Emissions in Direct Injection Engines

2001 ◽  
Author(s):  
Indranil Brahma ◽  
Xuelei Zhu ◽  
Steven H. Frankel ◽  
Jay P. Gore
Keyword(s):  
Direct Injection ◽  
Pollutant Emissions ◽  
Combustion Model ◽  
Mixing Length ◽  
Two Dimensional ◽  
Radiation Heat ◽  
Direct Injection Engines ◽  
Radiation Heat Loss ◽  
Opposed Flow ◽  
Effects Of Radiation

Abstract The laminar flamelet combustion model was used to study the effects of radiation on chemistry in a direct injection engine. A two dimensional axisymmetric engine code with a simple mixing length turbulence model was used. Four state relationships for different conditions were obtained from laminar opposed flow diffusion flame calculations by considering gas and soot radiation heat loss using detailed gas and global soot kinetics. The effects of radiation on pollutant emissions were studied by using the four state relationships in the engine calculations.

Theoretical Analysis of Diffusion Flames Using Perturbation Method for Different Lewis and Damkohler Numbers

2013 ◽  
Vol 29 (2) ◽  
pp. 345-354 ◽  
Author(s):  
Mehdi Bidabadi ◽  
Payam Asadollahzadeh ◽  
Mohammad N. P. Meibudy
Keyword(s):  
Perturbation Method ◽  
Burning Rate ◽  
Heat Loss ◽  
Reaction Zone ◽  
Diffusion Flames ◽  
Flame Temperature ◽  
Asymptotic Model ◽  
Radiation Heat ◽  
Exponential Parameter ◽  
Radiation Heat Loss

AbstractThis paper presents a two dimensional asymptotic model of counterflow diffusion flame in the presence of radiation heat loss. The fuel and oxidizer, respectively, are injected from left and right hand side of the flame. The effects of burning rate, Lewis and Damkohler number on the structure and extinction of the flame is studied using perturbation method. To do so, the structure of the flame is considered to be composed of reaction zone with a thickness of O(ε) and radiation heat loss zone, of O(δ) thickness, that sandwiches the reaction zone. The effect of burning rate is illustrated by burning pre-exponential parameter, B. It is found that with the increase of the parameter, the flame temperature is also increased, and flame location moves toward the fuel side. In addition, the variation of Lewis number of fuel and oxidizer has a significant effect on the location and temperature of the flame.

Prediction of lifted, non-premixed turbulent flames using a mixedness-reactedness flamelet model with radiation heat loss

2002 ◽  
Vol 128 (1-2) ◽  
pp. 60-73 ◽  
Author(s):  
C.Y. Ma ◽  
T. Mahmud ◽  
M. Fairweather ◽  
E. Hampartsoumian ◽  
P.H. Gaskell
Keyword(s):  
Heat Loss ◽  
Turbulent Flames ◽  
Radiation Heat ◽  
Flamelet Model ◽  
Radiation Heat Loss ◽  
Premixed Turbulent Flames
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