Porous burners for lean-burn applications

Applications of porous media combustion technology – A review

Combustion in porous media and its applications--a comprehensive survey.

An experimental and numerical investigation of premixed methane combustion within a nonhomogeneous porous ceramic was performed. The burner consisted of two porous ceramic cylinders of equal length and diameter that were stacked together and insulated around the circumference. Four series of experiments were carried out to determine the lean limit using three different pore sizes in the downstream ceramic cylinder (SBR). The pore size in the upstream ceramic cylinder was constant in all four cases. A new definition of the lean limit was introduced to account for the effects of the porous ceramic. The burners were tested over the range of lean limit 0.41 < φ≤ 0.68 and the numerical simulations were performed over 0.43 < φ ≤ 1.0. The results demonstrated that porous ceramic burners provide a range of stable burning rates at a constant φ, The maximum flame speed inside the burners was much higher than the premixed, freely burning adiabatic laminar flame (free flame) speed. The lean limits in the por...

Experimental and Numerical Study of Premixed Combustion Within Nonhomogeneous Porous Ceramics

Superadiabatic combustion in a porous medium

多孔性固体を使用し.ガス顕熱のふく射エネルギヘの効果的変換を行い,さらに多孔性固体下流側で燃焼用空気を排ガスにて予熱することにより断熱材を使用しない小形の燃焼器を可能にした.都市ガスを使用して希薄混合気の燃焼実験を行った結果,空気過剰率m=9.9(相当発熱量114Kcal/Nm3)というきわめて低い発熱量のガスの燃焼が可能になり,工業的にも非常に有用であることがわかった.

Combustion augmentation of extremely low calorific gases. Application of the effective energy conversion method from gas enthalpy to thermal radiation.

Mamoru Kurusu

Papers

Combustion augmentation of extremely low calorific gases. Application of the effective energy conversion method from gas enthalpy to thermal radiation.