Chemical Flame Length and Volume in Liquified Propane Gas Combustion Using High-Temperature and Low-Oxygen-Concentration Oxidizer

In this paper, the effect of a high-temperature oxidizer at different oxygen concentrations on chemical flame length and volume has been numerically studied. Liquified propane gas (LPG) was used as the fuel. Hot exhaust flue gas was used as the dilution gas. The studied parameters include oxygen concentration and temperature of the oxidizer, fuel temperature, fuel firing rate, and diameter of the fuel nozzle. The following results were obtained:  (1) Chemical flame length increased as either the oxygen content decreased, the oxidizer temperature increased, or the fuel temperature decreased; furthermore, the chemical flame length was independent of the fuel flow rate and the diameter of the fuel nozzle for the studied cases. (2) Chemical flame volume increased either as the oxygen content decreased and the oxidizer temperature increased, the fuel temperature was reduced, or the fuel firing rate was increased; chemical flame volume was dependent very much on the oxygen concentration in the oxidizer. (3) Inf...

[1]  Yang Weihong,et al.  Combustion performance and numerical simulation of a high‐temperature air–LPG flame on a regenerative burner , 2004 .

[2]  Wlodzimierz Blasiak,et al.  Physical properties of a LPG flame with high-temperature air on a regenerative burner , 2004 .

[3]  Toshiaki Hasegawa,et al.  Development of Advanced Industrial Furnace Using Highly Preheated Combustion Air , 2002 .

[4]  W. Blasiak,et al.  Visualization of Fuel Jet in Conditions of Highly Preheated Air Combustion , 2000 .

[5]  A. Gupta,et al.  Effect of Air Preheat Temperature and Oxygen Concentration on Flame Structure and Emission , 1999 .

[6]  T. Blake,et al.  An examination of flame length data from vertical turbulent diffusion flames , 1993 .

[7]  Michael A. Delichatsios,et al.  Transition from momentum to buoyancy-controlled turbulent jet diffusion flames and flame height relationships , 1993 .

[8]  A. Gupta,et al.  Two-Dimensional Spectroscopic Observation of Nonluminous Flames in a Regenerative Industrial Furnace Using Coal Gas , 2004 .

[9]  A. Gupta,et al.  Thermal Characteristics of Gaseous Fuel Flames Using High Temperature Air , 2004 .

[10]  A. Gupta,et al.  Temporally Resolved Two-Dimensional Spectroscopic Study on the Effect of Highly Preheated and Low Oxygen Concentration Air on Combustion , 2003 .

[11]  Ichiro Naruse,et al.  Effects of Air Dilution on Highly Preheated Air Combustion in a Regenerative Furnace , 1999 .

[12]  H. A. Becker,et al.  Visible length of vertical free turbulent diffusion flames , 1978 .