The combination of sensor and computer technology makes the measurement of various physical quantities easy, convenient and smart. In this article, a digital pressure gauge that is suitable for measuring liquid pressu...The combination of sensor and computer technology makes the measurement of various physical quantities easy, convenient and smart. In this article, a digital pressure gauge that is suitable for measuring liquid pressure is designed. The design of high precision digital pressure gauge uses pressure sensor as its foundation and uses ATmegal6 as its controller.展开更多
Accurately predicting reactive flow is a challenge when characterizing an explosive under external shock stimuli as the shock initiation time is on the order of a microsecond.The present study constructs a new Ignitio...Accurately predicting reactive flow is a challenge when characterizing an explosive under external shock stimuli as the shock initiation time is on the order of a microsecond.The present study constructs a new Ignition-Growth reaction rate model,which can describe the shock initiation processes of explosives with different initial densities,particle sizes and loading pressures by only one set of model parameters.Compared with the Lee-Tarver reaction rate model,the new Ignition-Growth reaction rate model describes better the shock initiation process of explosives and requires fewer model parameters.Moreover,the shock initiation of a 2,4-Dinitroanisole(DNAN)-based melt-cast explosive RDA-2(DNAN/HMX(octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazoncine)/aluminum)are investigated both experimentally and numerically.A series of shock initiation experiments is performed with manganin piezoresistive pressure gauges and corresponding numerical simulations are carried out with the new Ignition-Growth reaction rate model.The RDA-2 explosive is found to have higher critical initiation pressure and lower shock sensitivity than traditional explosives(such as the Comp.B explosive).The calibrated reaction rate model parameters of RDA-2 could provide numerical basis for its further application.展开更多
基金National Natural Science Foundation of China(No.60804034)Natural Science Foundation of Shandong Province(No.ZR2009GQ006)+5 种基金Project of Science and Technology of Qingdao Economic and Technological Development Area(2009-2-39)China Postdoctoral Science Foundation(No.20100471521)Special Financial Grant from China Postdoctoral Science Foundation(No.201104632)Innovation Project Special Fund for Post Doctors of Shandong Province(No.201002028)Shandong University of Science and Technology Research Fund(No.2010KYJQ105)Project of Shandong Province Higher Educational Science and Technology Program(No.J11LG53)
文摘The combination of sensor and computer technology makes the measurement of various physical quantities easy, convenient and smart. In this article, a digital pressure gauge that is suitable for measuring liquid pressure is designed. The design of high precision digital pressure gauge uses pressure sensor as its foundation and uses ATmegal6 as its controller.
基金supported by the Innovative Group of Material and Structure Impact Dynamics(Grant No.11521062)。
文摘Accurately predicting reactive flow is a challenge when characterizing an explosive under external shock stimuli as the shock initiation time is on the order of a microsecond.The present study constructs a new Ignition-Growth reaction rate model,which can describe the shock initiation processes of explosives with different initial densities,particle sizes and loading pressures by only one set of model parameters.Compared with the Lee-Tarver reaction rate model,the new Ignition-Growth reaction rate model describes better the shock initiation process of explosives and requires fewer model parameters.Moreover,the shock initiation of a 2,4-Dinitroanisole(DNAN)-based melt-cast explosive RDA-2(DNAN/HMX(octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazoncine)/aluminum)are investigated both experimentally and numerically.A series of shock initiation experiments is performed with manganin piezoresistive pressure gauges and corresponding numerical simulations are carried out with the new Ignition-Growth reaction rate model.The RDA-2 explosive is found to have higher critical initiation pressure and lower shock sensitivity than traditional explosives(such as the Comp.B explosive).The calibrated reaction rate model parameters of RDA-2 could provide numerical basis for its further application.
