【摘要】 为了提高助燃法测试硼粉燃烧热值的准确性,探寻助燃剂选取的规律原则,分别选用含硼推进剂研制领域常见的苯甲酸、90方片药、镁粉、某火箭推进剂测试标准药四种物质作为助燃剂,采用干法和湿法两种混合方式,在GR3500氧弹量热计中测试了95级无定形硼粉的燃烧热,进行对比实验研究。结果显示:不加助燃剂,直接测试硼粉燃烧热,点火失败;采用不同的助燃剂,硼粉的燃烧效率不同。分析认为选择的助燃剂应具有易引燃、高热值、高燃温、低成气率的特点,同时燃速应和硼粉相匹配,化学性质应和硼粉具有良好的相容性。另外,混合试样中,助燃剂和硼粉结合地越紧密,混合地越均匀,越能发挥助燃作用.相比于干法混合,湿法混合制作固态药条试样测试硼粉燃烧热值时,硼粉燃烧效率更高。更多还原

【Abstract】 In order to improve the accuracy of the test of combustion heat value of boron powder using combustion-supporting agent and to explore the principles of combustion-supporting agent selection,four substances commonly used in the field of developing boron-containing propellant,such as benzoic acid,90 square tablet,magnesium powder,and a standard drug in rocket propellant test were selected to be combustion-supporting agents respectively,two methods namely dry mixing and wet mixing were used,the combustion heat value of amorphous boron powder with 95 grade was tested in GR3500 oxygen bomb calorimeter,and comparative experimental study was then studied.The results show that the ignition failed when directly testing the combustion heat value of boron powder without combustion-supporting agent,and the combustion efficiency of the boron powder is different when using different combustion-supporting agent.The conclusions are that the selected combustion-supporting agent should be easy to ignite,having high heat value,high ignition temperature,and low gas rates,burning rate of which should match that of the boron powder,and the chemical properties of which should have good compatibility with boron powder.In addition,the role of supporting combustion is more played in mixed sample when the combustion-supporting agent and the boron powder are more closely combined and more evenly mixed.The combustion efficiency of the boron powder is higher when testing the combustion heat value of boron powder using solid-state strip sample produced by wet mixing method compared with that of the dry mixing method.更多还原