N_2O/C_3H_8点火器初步实验

Preliminary experimental investigation on nitrous oxide/propane igniter

为了研究氧化亚氮与丙烷的点火特性,首次提出了N2O/C3H8火炬式点火方案,设计、加工了点火器,并组建了点火实验系统,在不同的流量和余氧系数下进行了点火实验.结果表明：点火方案可行,喷嘴设计合理,雾化效果和余氧系数是决定点火器能否点燃的关键,余氧系数在0.222~0.321内点火器能可靠地被重复点燃并形成稳定的点火火炬.实验为N2O/C3H8点火器的进一步研究提供了参考,并为以后实现该点火器对发动机的成功点火奠定了基础.

To investigate the ignition characteristics of nitrous oxide/propane,the torch igniter scheme of N2O/C3H8 was proposed initially.An igniter was designed and manufactured,and the experimental system was designed.The hot-tests under different condition of mass flow and excess-oxidizer coefficient show that the scheme is feasible,injector structure is reasonable,the spray quality and the excess-oxidizer coefficient are the key for successful ignition,and the igniter is able to generate multiple ignition and produce ignition torch successfully within the excess-oxidizer coefficient range 0.222~0.321.The experiment offers reference for the further study and establishes the foundation for achieving N2O/C3H8 motor ignition directly by this igniter.