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- W2373987343 abstract "In order to maximize density specific impulse of the Al/AP bipropellant powder rocket engine,the fire tests on Al/AP powder rocket engine were carried out with increasing the characteristic length of combustion chamber from 2.31 mto 12.62 m.Combustion performances of Al/AP mixtures such as ignition delay,burn time,combustion smoothness and intensity of vapor phase reaction in nitrogen under atmospheric pressure were studied by using spectrometer,CCD camera and CO2 laser igniter.Apparent packing densities of samples were measured.As an alternative fuel,the magnesium particles were also studied.The results show that,increasing chamber characteristic length from 2.31 mto 12.62 mproduces smoother combustion with ±2.43% maximum amplitude of chamber pressure oscillation.Flame of Al/AP mixture with 1μm Al particles is much more luminous than that with 10μm Al particles.And the continuous emission signal intensity of Al/AP mixture with 1μm Al particles at 568 nm exceeds the upper limit(65 000counts)of the spectrometer,rather than Al/AP mixture with 10μm Al particles with continuous intervals among combustion process and lower emission signal intensity at 568 nm of below 19 036 counts.Ignition delay and burn time of10μm Al particles are 3.65 times and 3.03 times as 1μm Al particles,respectively.But the maximumRAlOand packing density are14.3% and 21.3%less than 1μm Al powder,showing that smaller Al particles have better combustion performance but lower packing density.Although the theoretical specific impulse of the Mg/AP propellant is 95.6% of the Al/AP,its bulk density is 8%higher than 1μm Al powder,and the ignition delay is 90.3%shorter than 10μm particles.Flame images also show that magnesium can largely reduce the condensed phase deposition." @default.
- W2373987343 created "2016-06-24" @default.
- W2373987343 creator A5021463557 @default.
- W2373987343 date "2016-01-01" @default.
- W2373987343 modified "2023-09-26" @default.
- W2373987343 title "Analysis on the Combustion Characteristics of Metal/AP Mixtures by Using Emission Spectroscopy" @default.
- W2373987343 hasPublicationYear "2016" @default.
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