A210 LIFTOFF AND BLOWOUT BEHAVIOR IN NONPREMIXED TURBULENT FREE AND CONFINED JETS(Laminar flame-3)

スポンサーリンク

概要

• 論文の詳細を見る

• Characteristics of the lifted flames in nonpremixed turbulent jets are investigated experimentally with focuses on the liftoff and blowout behavior for methane, ethane, ethylene, propane, and n-butane fuels. For free jets, the liftoff height is independent of the nozzle diameter. Liftoff velocities are nearly constant for fully turbulent flow irrespective of nozzle diameter for a given fuel, while in the laminar to turbulent transition regime, they follow critical Reynolds number for transition. The ratio of liftoff height to nozzle diameter at blowout maintains a constant value. For various fuels, the ratio correlates linearly with the parameter defined as the multiplication of the square root of fuel to air density ratio and stoichiometric air to fuel mass ratio, in much the same way as the correlation of flame length in turbulent nonpremixed jets. Jet confinement significantly alters the lifted flame behavior. The liftoff height is linearly proportional to nozzle diameter and flow velocity. Liftoff velocities are lower than that of the free jets, whereas the ratio of liftoff height to nozzle diameter at blowout maintains the same constant value as to free jets.

• 一般社団法人日本機械学会の論文
• 2000-10-01

著者

• Cha Min

  Combustion And Environment Engineering Group Korea Institute Of Machinery And Materials

• Chung Suk

  School of Mechanical and Aerospace Engineering, Seoul National University

• Chung Suk

  School Of Mechanical And Aerospace Engineering Seoul National University

関連論文

• A210 LIFTOFF AND BLOWOUT BEHAVIOR IN NONPREMIXED TURBULENT FREE AND CONFINED JETS(Laminar flame-3)
• In-situ observation of the soot deposition process on a solid wall with a diffusion flame along the wall
• Several Applications of Laser Diagnostics for Visualization of Combustion Phenomena
• A205 NUMERICAL STUDY ON TRIBRACHIAL FLAME PROPAGATION IN A 2-D MIXING LAYER(Laminar flame-1)

スポンサーリンク