含TNAD改性双基推进剂的燃烧性能和热行为

用燃速测试法和高压差示扫描量热(PDSC)法研究了含1,4,5,8-四硝基-1,4,5,8-四氮杂萘烷(TNAD)改性双基推进剂的燃烧性能和热行为。结果表明,用等质量的TNAD替代黑索今(RDX),在9~22 MPa范围内推进剂燃速均明显增加,且增幅均大于9%,在9~15 MPa,燃速平均提高约3 mm·s-1。燃速压强指数在9~15 MPa从0.26降至0.18,但在17~22 MPa范围内,燃速压强指数从0.10略有升高,为0.14。PDSC分析认为,双基组分(硝化棉NC/硝化甘油NG)与TNAD间存在强烈的相互作用,使二者分解速率加快,放热量增加,利于提高推进剂燃速。

Combustion Characteristics and Thermal Behavior of Modified Double Base Propellant Containing TNAD

The combustion characteristics and thermal behavior of modified double base propellant containing Trans-1, 4, 5, 8-tetranitro-1, 4, 5, 8-tetraaza dacalin (TNAD) were investigated by burning rate test and PDSC. Results show that there was a general increase(greater than 9%) in burning rate when RDX is replaced by TNAD in propellant in the tested pressure range of 9-22 MPa. The pressure exponent in the pressure range of 9-15 MPa decreases from 0.26 to 0.18, but increases from 0.10 to 0.14 when the pressure is above 15 MPa. By analyzing from PDSC data, it is suggested that there is a strong interaction between NC/NG and TNAD, which increase the burning rate of propellant by enhancing the decomposition rate and heat release of the mixed system.