TOWARDS THE SIMPLIFIED COMPOSITE PROPELLANT BURNING RATE MODEL BASED ON DETAILED CHEMISTRY CALCULATIONS

摘要

A simple burning rate model for ammonium perchlorate (AP) and hydroxyl-terminated-polybu-tadiene (HTPB) composite propellants has been developed based on detailed chemistry calculations. The detailed kinetics two-dimensional (DK2D) model, which includes detailed kinetics and species transport, was used to identify combustion trends in AP/HTPB propellants. These trends in the burning behavior of AP-based composite propellants have been verified by comparison with recently collected experimental data. A simple burning rate model has been developed based on the identified trends and calculated burning rates of the DK2D model. The methodology used to predict the burning rates with the simple model is presented. This simplified AP/HTPB burning rate model requires very minimal runtime and adequately predicts the burning rates based on AP particle size, formulation, and pressure. This model has been applied to 27 different AP/HTPB formations including mono-, bi-, and trimodal propellants, and 90% of the predictions have fallen within 20% of experimental data. The advantages and limitations of the approach are discussed.