Method for determining parameters of the high energy materials burning rate law

Abstract

Method for determining parameters of the burning rate law including combustion of high energy material samples in a manometric bomb is proposed. This method is based on solving the inverse problem of internal ballistics in an integral formulation. Unlike the prior versions embodiments of the experimental setup, the principle of ignition of a HEM sample by a heated spiral is used herein. In the prior versions, the ignition of the sample was carried out with black powder, which introduced errors due to gas formation during the burning of the powder. In addition, heat-insulated inserts are installed on inner walls of manometric bomb to prevent heat losses. The results of the method verification for model high energy material are discussed. Verification of the proposed method for identifying the parameters of the burning rate law was carried out for the model HEM composition with known values of thermophysical and ballistic characteristics. The integral method allows determining parameters of the burning rate law u 1, v with the error of not more than 3-4% by experimental dependence p(t) measured with a random error of 10%. At the same time errors of determination u 1, v by the differential method is 14-32%.