含能材料
含能材料
함능재료
ENERGETIC MATERIALS
2014年
5期
669-673
,共5页
军事化学%AP /HTPB 复合底排药剂%比热容%导热系数%自然老化
軍事化學%AP /HTPB 複閤底排藥劑%比熱容%導熱繫數%自然老化
군사화학%AP /HTPB 복합저배약제%비열용%도열계수%자연노화
military chemistry%AP /HTPB composite base bleed propellant%specific heat capacity%conductivity coefficient%naturally aged
为研究底排装置内底排药剂点火燃烧特性并提高数值计算准确性，用差示扫描量热仪（DSC）和热导仪对比研究了某155 mm底排弹用未老化和经自然老化（在密封塑料袋内室温保存20余年）的高氯酸铵（AP）/端羟基聚丁二烯（HTPB）底排药剂的比热容和导热系数。结果表明，老化底排药剂20℃· min -1升温时 DSC 曲线的最大吸热峰温度和最大放热峰温度分别为253．52℃和437．54℃。基于 DSC 曲线和多项式拟合法得到了40～180℃温区间的比热容与温度的依变关系。老化底排药剂的比热容平均值和导热系数分别为0．9868 kJ· kg -1·℃-1和0．2292 W · m -1· K -1。未老化底排药剂的比热容平均值和导热系数分别为0．8887 kJ·kg -1·℃-1和0．4020 W·m -1·K -1。与未老化药剂相比，老化药剂的比热容增大约11％，而导热系数减小约43％。
為研究底排裝置內底排藥劑點火燃燒特性併提高數值計算準確性，用差示掃描量熱儀（DSC）和熱導儀對比研究瞭某155 mm底排彈用未老化和經自然老化（在密封塑料袋內室溫保存20餘年）的高氯痠銨（AP）/耑羥基聚丁二烯（HTPB）底排藥劑的比熱容和導熱繫數。結果錶明，老化底排藥劑20℃· min -1升溫時 DSC 麯線的最大吸熱峰溫度和最大放熱峰溫度分彆為253．52℃和437．54℃。基于 DSC 麯線和多項式擬閤法得到瞭40～180℃溫區間的比熱容與溫度的依變關繫。老化底排藥劑的比熱容平均值和導熱繫數分彆為0．9868 kJ· kg -1·℃-1和0．2292 W · m -1· K -1。未老化底排藥劑的比熱容平均值和導熱繫數分彆為0．8887 kJ·kg -1·℃-1和0．4020 W·m -1·K -1。與未老化藥劑相比，老化藥劑的比熱容增大約11％，而導熱繫數減小約43％。
위연구저배장치내저배약제점화연소특성병제고수치계산준학성，용차시소묘량열의（DSC）화열도의대비연구료모155 mm저배탄용미노화화경자연노화（재밀봉소료대내실온보존20여년）적고록산안（AP）/단간기취정이희（HTPB）저배약제적비열용화도열계수。결과표명，노화저배약제20℃· min -1승온시 DSC 곡선적최대흡열봉온도화최대방열봉온도분별위253．52℃화437．54℃。기우 DSC 곡선화다항식의합법득도료40～180℃온구간적비열용여온도적의변관계。노화저배약제적비열용평균치화도열계수분별위0．9868 kJ· kg -1·℃-1화0．2292 W · m -1· K -1。미노화저배약제적비열용평균치화도열계수분별위0．8887 kJ·kg -1·℃-1화0．4020 W·m -1·K -1。여미노화약제상비，노화약제적비열용증대약11％，이도열계수감소약43％。
To research the ignition and combustion characteristics of base bleed propellant in the base bleed unit and improve the accuracy of numerical simulation,the specific heat capacity and conductivity coefficient for unaged and naturally aged(stored in a sealed plastic bag under room temperature)AP /HTPB base bleed propellant used in a 155mm base bleed projectile were deter-mined by differential scanning calorimeter(DSC)and conductometer,respectively. Results show that the maximum endothermic peak temperature and the maximum exothermlic peak temperature on DSC curve of the aged base bleed propellant at a heating rate of 20 ℃·min -1 are 253. 52 ℃ and 437. 54 ℃,respectively. The function of specific heat capacity as temperature with in 40 -180 ℃ is obtained based on DSC curves by polynomial fitting method. The average specific heat capacity and conductivity coefficient are 0.9868 kJ·kg-1 ·℃ -1 and 0. 2292 W · m-1 · K-1 for the aged base bleed propellant and 0. 8887 kJ · kg-1 ·℃ -1 and 0.4020 W·m-1 ·K-1 for unaged base bleed propellant,respectively. In comparison with unaged base bleed propellant,the aver-age specific heat capacity of aged base bleed propellant increases about 11% ,whereas conductivity coefficient of aged bleed pro-pellant decreases about 43% .
