ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Experimental analysis on plasma assisted secondary combustion of boron-based gas
Received date: 2015-09-13
Revised date: 2015-10-25
Online published: 2016-01-30
Supported by
National Natural Science Foundation of China (11372356)
In order to research the influence of plasma on the secondary combustion characteristic of boron-based gas in the afterburning chamber, a diffusion combustion experimental model which can exclude the mixing effect of intake air on the boron-based gas is designed and built. The flame image of boron-based gas secondary combustion is measured by the high-speed photographic apparatus to analyze the degree of brightness of the flame and the flame shape; the total pressure and static pressure of different cross-sections in the combustion chamber are measured to analyze the combustion efficiency of boron-based propellant under the influence of plasma. The results show that when adding plasma torch at the secondary combustion of boron-based gas, the combustion efficiency of boron-based gas increases and the boron-based flame is brighter; the abrupt decrease in the total pressure and static pressure appears when turning the plasma torch off. These show that the chemical reaction rate of boron-based gas increases with plasma, and the combustion efficiency of boron-based propellant in the solid rocket ramjet increases with plasma, which leads to the increase of the total pressure and static pressure with plasma; the combustion efficiency increases with the growth of discharge plasma power.
Key words： plasma torches; ducted rocket engines; boron; afterburning chamber; diffusion flames
ZHANG Peng, HONG Yanji, DING Xiaoyu, JI Hailong. Experimental analysis on plasma assisted secondary combustion of boron-based gas[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(9): 2721-2728. DOI: 10.7527/S1000-6893.2015.0350
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