Multispectral Infrared Flare Formulations

摘要

Various types of threats from 1R guided missiles exist for Aerial vehicles such as fighter jets, transport aircrafts and helicopters.Pyrotechnic or countermeasure flare technologies have also grown with time to counter these advancements m missile seeker development.Various flares are under development worldwide and many have successfully been field tested for countering missile threats.The spectral discrimination technique used by these missiles as a counter-counter measure identifies the decoy based on the pattern of its IR radiations.To counter such threats, Multispectral flare formulations are required to effectively produce the required IR radiation patterns.The authors have studied various organic fuels along with oxidisers such as Potassium Perchlorate and fluorinated oxidizer.Although few formulations displayed the required IR intensifies in the two wavebands, their burn rates were found to be of lower orders for effective decoying of advanced seekers employing spectral discrimination.The aim of this study is to prepare formulations which display the desired IR intensity, bum rate and 1R intensity ratio.This paper discusses the studies carried out for development of Multispectral IR Flare using organic fuels such as Benzoguinamine, Napthalene-1,4-Dicarboxylic acid, 2,2'-Dinitrobiphenyl and Carbazole along with Sodium Nitrate and Potassium Perchlorate as oxidizer and Viton as a binder.Metallic fuel was added to the formulations for enhancing the burn rate.In the present study, the effect of addition of metallic fuel on various organic fuels based Multispectral IR flare formulations have been studied with respect to the IR efficiency and the desired intensity ratios performance.Sensitivity parameters were also analysed and it is found that all the formulations are safe for handling and storage.The preparation of formulations, radiometric evaluation and thermo chemical calculations of the Multispectral IR Flare formulations will be discussed and elaborated in this paper.