Heat Transfer of a Methane+Oxygen Bunsen Flame Jet

In order to determine the heat flux from an oxy-fuel flame to glass products, an analytical approximation for the velocity of an isothermal laminar hot gas flow heating a flat plate is presented. The strain rate of the burnt gases can be calculated knowing the velocity profile. This strain rate is an important parameter which affects the heat flux from the flame to the plate a lot. Both non-viscous and viscous gas flows are discussed. An expression for the heat flux is derived by implementing the expression for the velocity in the energy equation for the burnt gases close to the plate. The results of the analytical approximations are compared to calculations performed with Fluent. The outcome of the numerical calculations show good agreement with the analytical results.