The experimental heat value of the boron based fuel-rich propellant is usually lower than the theoretical value because of the imperfect combustion of the propellant, which makes it difficult to represent the real heat value of the propellant. In order to solve this problem, the effects of the sample mass and the initial pressure of oxygen bomb on the experimental heat value of the boron based fuel-rich propellant were studied. Results show that the tested heat value of the propellant increases with the increasing mass of the sample and the initial pressure of the oxygen bomb under the safe level of the oxygen bomb. The boron based fuel-rich propellant with the size about 20 mesh was mixed with ZS combustion improver by the solver and the final sample was made after a series of treatment process. The special W crucible was made according to the combustion characteristics of the boron based fuel-rich propellant, and the improved oxygen bomb calorimeter was used to test the heat value of the sample. The result indicates that it is effective to test the heat value of the boron based fuel-rich propellant by the use of the combustion improver, which solve the problem that the propellant can not combust completely, and the result has high accuracy and reliability.%为了解决含硼富燃料推进剂在氧弹内燃烧效率低、实验测试值不能正确表征实际燃烧热值的问题,研究了含硼富燃料推进剂燃烧热值测试过程中试样质量和充氧压强对测试结果的影响,在氧弹安全承载范围内,试样质量越大、充氧压强越大,含硼富燃料推进剂燃烧越完全.使用有机溶剂溶解后挥发的混合方式,将作为助燃剂的自制ZS与加工成20目含硼富燃料推进剂实现紧密结合,经过一系列工艺处理制得试样.根据含硼富燃料推进剂在氧弹内的燃烧特点设计加工了专用钨坩埚,使用改进型氧弹式量热仪对试样进行热值测试.实验结果表明,助燃法测试含硼富燃料推进剂的燃烧热值较为有效,解决了含硼富燃料推进剂在氧弹内燃烧不完全以及测试值不能正确表征理论燃烧热值的问题,具有较高的准确性和可靠性.
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