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      “介绍了其在点火具燃烧特性领域的研究进展，专家采用高速录像系统和红外热像仪研究了五种点火药剂在不同孔径下的燃烧扩展特性，并测得火焰温度场分布，为优化点火具性能提供了依据。”

      MA Long-ze, YU Yong-gang

      摘要：The range and longitudinal density of base-bleed projectile are closely related to the working performance of igniter. The combustion expansion characteristics under different igniter orifice diameters（6.5， 8 mm） for five kinds of ignition agents， magnesium/polytetrafluoroethylene （MT） （Mg/PTFE 45/55、Mg/PTFE 55/45、Mg/PTFE 61/39）， barium nitrate （Ba （NO3）2） and zirconium hydride/lead oxide （ZrH2/PbO2 40/60）， were investigated in the atmospheric environment by using high-speed video system and infrared thermal imager and then the flame temperature field distribution of seven kinds of igniters shown in Table 1 of the text was measured. On the basis of experiment， the finite volume method based on internal nodes was applied to three-dimensional numerical simulation of the combustion jet field of MT igniter. The distribution rule of combustion characteristic parameters of the igniter in the atmosphere under different mass ratio of MT and orifice diameter of the igniter was analyzed. The experimental and numerical results show that ZrH2/PbO2 igniter will destroy the "parallel layer" combustion law of base bleed propellant. The ignition area effective factor is proposed to represent the significant degree of the propellant ignition area， and is combined with the ignition time to synthetically evaluate the ignition performance of the igniter. It is found that the MT igniter with mass ratio of 61：39 and orifice diameter of 8 mm is the best. The maximum flame temperature region of igniter is located above the potential core of the nozzle. The smaller the magnesium content in the range of 0.45-0.61 is， the higher the flame temperature in the combustion field of the MT igniter. When the magnesium content is constant and the orifice diameter of igniter is 6.5 and 8 mm， the larger orifice diameter has the stronger heat convection in the combustion field， the higher center axial temperature and the greater temperature gradient.  
      关键词：base-bleed igniter;combustion jet;expansion characteristics;ignition performance;finite volume method   
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      更新时间：2026-03-02
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