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Investigation of Helium Assisted Low Frequency Plasma for Liquid Oxygen and Hydrocarbon Ignition

机译:氦辅助低频等离子体对液氧和碳氢化合物着火的研究

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A low frequency plasma jet as a new ignition procedure for non-hypergolic bipropellant thrusters is proposed. Typical applications include LOX with methane and other hydrocarbon fuels.. Helium is used as a working fluid for plasma jet because of its low breakdown voltage. Preliminary ignition experiments about plasma configuration for gaseous oxygen and methane are performed and indicate that a dielectric barrier discharge plasma is insufficient to ignite the propellant mixtures, and that a thermal plasma should be used instead.. A test setup, suitable for both gaseous and liquid propellants for ignition testing of a 20 N-class thruster, is described. It is applied to ignition characterization of gaseous oxygen and methane at various flow rates and equivalence ratios at atmospheric conditions. Results show reliable ignition with less than 30 ras delay and over a wide range of equivalence ratio, from approximately 0.5 to 2.5.
机译:提出了一种低频等离子射流作为非超双螺旋推进器推进器的新型点火程序。典型应用包括与甲烷和其他碳氢化合物燃料一起使用的LOX。氦气由于其低击穿电压而被用作等离子流的工作流体。进行了有关气态氧和甲烷的等离子体构型的初步点火实验,结果表明,电介质阻挡层放电等离子体不足以点燃推进剂混合物,应改用热等离子体。.适用于气态和液态的测试装置描述了用于20 N级推进器点火测试的推进剂。它适用于在大气条件下以各种流量和当量比进行气态氧气和甲烷的点火表征。结果表明,可靠的点火具有不到30 ras的延迟,并且在大约0.5到2.5的相当当量比范围内。

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