Energy Characteristics of High Burning Rate CMDB Propellants Containing High Nitrogen Compounds

The energy characteristics of the composite modified double base(CMDB) propellants containing high nitrogen compound 3,6-bis(1H-1,2,3,4-tetrazol-5-yl-amino)-1,2,4,5-tetrazine(BTATz) were calculated by using energy calculation program, and the influence rules on energy characteristics of CMDB propellants containing BTATz were studied after partly substituting BTATz and nitroglycerin(NG) by separately using three energetic additives of ammonium perchlorate(AP), hexanitrohexaazaisowurtzitane(HNIW) and hexogeon(RDX), as well as two plasticizers of 1,5-diazido-3-nitrazapentane(DIANP) and triethyleneglycol dinitrate(TEGDN). The results show that whether or not the propellants include the Al powder, after using BTATz substituting the nitrocellulose(NC) and NG in the CMDB propellants, the various energy characteristic parameters of the initial propellant decrease to some extent. After using AP and HNIW partly substituting the BTATz, the theoretical specific impulse of BTATz-CMDB propellant significantly increases. After using DIANP or TEGDN partly substituting the NG in the propellants, the various energy characteristic parameters all decrease with increasing of their contents.