Flux feedback from the gas phase

When the term in the exponent Xg/6g >> 1, a simplified expression for the heat flux feedback from the gas phase to the solid phase is obtained ... 

The heat flux feedback from the gas phase to the condensed phase increases with increasing KNOj), and hence the burning rate increases with increasing energy density of double-base propellants, as shown in Figs. 6.1 and 6.2. 

The burning rate of propellants is one of the important parameters for rocket mo-tordesign. As described in Section 7.1.2, the burning rate of AP composite propellants is altered by changing the particle size of the AP used. The diffusional mixing process between the gaseous decomposition products of the AP particles and of the polymeric binder used as a fuel component determines the heat flux feedback from the gas phase to the condensed phase at the burning surface. - This process is a... 

The heat flux feedback from the gas phase to the burning surface is also determined by the chemical reaction rate in the gas phase. The reachon rate in the gas phase is altered by the addihon of catalysts. The catalysts act either on the decomposition reaction of the condensed phase or on the reaction in the gas phase of the gaseous decomposihon products. There are two types of catalysts posihve catalysts that increase the burning rate and negative catalysts that decrease the burning rate. 

The burning-surface temperature data and Qj, datal l are substituted into Eq. (3.73) to determine the condensed-phase parameter, r() . The heat flux feedback from the gas phase, qg, is given by... 

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