共查询到18条相似文献,搜索用时 171 毫秒
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分析了使用N2O4/UDMH推进剂的液体运载火箭爆炸事故冲击波形成过程与特征,介绍了N2O4/UDMH推进剂爆炸当量值的选择范围。给出了N2O4/UDMH推进剂爆炸实验研究结果与理论计算结果的比较和典型液体运载火箭爆炸冲击波危害距离估算值。 相似文献
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液体推进剂火箭爆炸辐射效应研究 总被引:1,自引:1,他引:1
本文提出了液体双组元推进剂火箭爆炸热辐射效应理论计算模型,并介绍了四氧化二氮/偏二甲肼推进剂爆炸实验研究结果。利用该理论模型计算了液体推进剂火箭爆炸时产生的火球直径,火球温度,火球持续时间,火球漂移,火球辐射热流,高空环境对火球尺寸的影响,火球热辐射破坏危险距离等。理论计算结果与实验测量结果吻合。该理论计算模型可为载人航天器逃逸系统工程设计和航天靶场建设提供有价值的理论分析数据 相似文献
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液体推进剂火灾爆炸事故类型分析及其预防 总被引:1,自引:0,他引:1
由于液体推进剂具有易燃、易爆危险性,针对液体推进剂火灾爆炸的各种原因进行分析,归纳出其火灾爆炸事故类型,从液体推进剂管道、容器安全布置、选材、设计、加工及安装等方面提出了预防措施,保证液体推进剂的安全性。 相似文献
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根据隔板实验确定固体推进剂临界爆轰压力时,往往假定被测推进剂药柱是在隔板界面附近起爆,忽视了验证板界面会反射强冲击波的特性,这些假定并没有实验进行验证和事实依据。因此,文中对隔板实验中验证板反射的冲击波对冲击起爆影响进行了实验研究,设计了对比验证实验,对比实验结果清楚地消除了验证板反射冲击波影响的不确定性,为以隔板界面入射冲击波压力作为被测推进剂药柱临界爆轰压力提供了可靠依据。 相似文献
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建立了液体火箭发动机水击压力的模型,进行了数值仿真和试验对比分析,研究了影响液体火箭发动机水击压力的影响因素,讨论了发动机关机后推进剂管路的压力瞬变特性,从而验证了数值模拟的正确性。 相似文献
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《Acta Astronautica》1986,13(10):599-605
Double base and composite propellants are generally used for rocket motors, whereby double base propellants basically consist of nitrocellulose plasticized with an explosive plasticizer, mostly nitroglycerine, and in some cases with an additional inert plasticizer and ballistic additives. Composite propellants consist of an oxidizer like ammonium perchlorate and of aluminum, binder and plasticizer and often contain liquid or solid burning rate catalysts. A common feature of both propellants is that they contain smaller or larger amounts of chemically unbonded liquid species which tend to migrate. If these propellants loose part of the plasticizer by migration into the insulation layer, not only will there be a change in mechanical propellant properties but also the bond between propellant and insulation may degrade. However, depending on the severity of these effects, the change in the ballistic properties of the propellant grain caused by plasticizer migration may be of even more importance.In the past, most emphasis was placed on the behaviour of end-burning configurations. However, more recent theoretical and experimental studies revealed that not only for end-burning grain configurations but also for internal burning configurations there is a common effect which is responsible for ballistic anomalies: migration of liquid species from the propellant into the insulation. By using a plasticizer equilibrated insulation in an internal burning configuration the liquid species migration and thus the previously observed ballistic anomalies are avoided. Using this approach for end-burning configurations provides similar positive results. The various factors affecting plasticizer migration are studied and discussed, and several methods to prevent liquid species migration are described as well as methods to obtain plasticizer resistant insulations. 相似文献
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本文对液体推进剂四氧化二氮/偏二甲肼(N2O4/UDMH)爆炸热过程特性进行了实验与理论研究。研究结果显示出了火球尺寸变化、火球持续时间、火球内部温度、火球辐射热流传递过程等热过程特性参数随推进剂重量、时间和空间位置的变化规律。理论预测结果与实验测量结果相比符合较好,表明理论预测模型的正确性。本文还讨论了火球升离地面的临界条件、高空环境对火球直径的影响和火球随风漂移等三方面的问题。 相似文献
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