不同压强下CL-20改性双基推进剂的能量释放规律

Energy Release of CL-20-CMDB Propellants under Different Pressures

采用最小自由能法用REAL计算了不同压强下含CL-20、RDX、Al改性双基推进剂的比冲和燃烧温度,并分析了比冲随压强的变化规律。结果表明,随着压强的增加,推进剂在低压下比冲的提高幅度较大,高压下提高幅度较小。当压强由2.MPa增至4MPa时,含CL-20、CL-20/RDX、CL-20/A1改性双基推进剂比冲增幅大于6%;从18MPa增加到20MPa时,比冲的增值小于1%。与添加RDX相比,添加CL-20或Al后,推进剂在低压区的比冲随压强的增加增幅增大,说明添加CL-20或A1更有利于提高低压下推进剂的能量释放。

Specific impulse and burning temperature of composite modified double-base （CMDB） propellant containing CL-20, RDX and A1 were calculated by means of minimum free energy method and REAL system. The change of specific impulse along with pressure was analyzed. It was showed that a significant increase in specific impulse occurred at low pressure while a little at high pressure with the increase of pressure. The increase of specific impulse was higher than 6 ~ with the pressure increasing from 2 MPa to 4 MPa, but it was lower than 1 % with the pressure increasing from 18 MPa to 20 MPa for the CMDB propellants containing CL-20, CL-20/RDX and CL 20/A1. The increase of specific impulse along with pressure was higher than that of RDX when the propellant contained CL 20 or A1 at low pressure range, which showed that CL-20 or A1 was in favor of energy release at low pressure.