排序方式: 共有19条查询结果,搜索用时 93 毫秒
1.
2.
4.
5.
6.
为了提高熔铸炸药块铸装药质量,以质量比DNAN/RDX/Al:55/20/25的基础配方为研究载体,采用两种不同装药工艺进行装药对比试验,并对样品的内外部质量、装药密度及其均匀性进行分析.结果表明,与常规块铸工艺相比,采用预整形同步块铸技术所装填的药柱,其装药密度达到了1.726g/cm3,相对密度为95.8%,与常规块铸工艺相比分别提高了0.041 g,/cm3和2.2%;同时减少了装药的缺陷,使装药内外部质量获得提高,并改善了装药的密度及其均匀性. 相似文献
7.
8.
9.
为了研究老化对炸药性能的影响,对自然贮存的3种熔铸炸药TNT/RDX、TNT/RDX/Al和 TNT/HMX/Al进行了加速老化试验。通过扫描电镜、真空安定性试验研究了老化前后3种炸药的微观形貌和安全性能,并测试了老化前后3种炸药的感度和爆速。结果表明,老化后炸药颜色变深,体积膨胀,质量变轻。样品的放气量小于2 mL/g ,热感度变化也较小。机械感度的变化与炸药组分和老化方式有关。TNT/RDX的爆速随着贮存时间的增加而降低,与整体加速老化情况一致,TNT/RDX/Al和 TNT/HMX/Al的爆热随贮存时间的增加变化趋势相反,说明两者老化机理可能不同。 相似文献
10.
A large-scale experimental system for multiphase combustion and explosion study was developed and manufactured.The explosion tank consists of a 2 m diameter,3.5 m long tube and ellipsoidal domes on both ends.The volume of the experimental tank is 10 m3.Pressure histories of the explosion pressure can be measured at different locations in the tank.High pressure glass windows of 200~300 mm were used to have access to the visualization of the explosion process.The explosion process of methane/air mixture and methane/coal dust/air mixture initiated by a 40 J electric spark at the center of the tank was studied in the large-scale experimental system.Five pressure sensors were arranged in the tank with different distances from the ignition point.Ten dust dispersion units were equipped to eject dust into the tank.A high-speed camera system was used to visualize the flame propagation during the explosion process.The characteristics of the pressure wave and flame propagated in methane/air mixtures and methane/coal dust/air mixtures have been studied and analyzed. 相似文献