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Design and Influencing Factors Analysis of a GO2/GCH4 Torch Igniter
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Xinpeng LIU, Weixin JI, Yan SHAO
Missiles and Space Vehicles | 2026, (3) : 24 - 30
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Missiles and Space Vehicles | 2026, (3): 24-30
• Propulsion •
Design and Influencing Factors Analysis of a GO2/GCH4 Torch Igniter
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Xinpeng LIU, Weixin JI, Yan SHAO
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  • Expace Technology Co. , Ltd. , Wuhan, 430415
Published: 2026-06-25 doi: 10.7654/j.issn.2097-1974.20260304
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To realize multiple starts of LOX/CH4 rocket engines, a fuel rich torch igniter fed with gaseous oxygen and gaseous methane is designed, in which methane is used as film cooling refrigerant. Through CFD simulation and CFD simulation, comparative study on the ignition reliability and thermal protective effect is conducted with three types of igniters. It is found that ignition mixture ratio affects the ignition success rate and thermal protective effect directly, and relative distances between methane injectors and oxygen injectors is an important parameter which would affect the working characteristics of the ignitors. The selected ignitor with double rows of CH4 injectors can ignite reliably while the mixture ratio is between 0.6 and 1.3. During the second round test in which the flow rate is 25~50 g/s while the mixture rate is 0.6~1.0, the ignitor ignited successfully 11 times in a row and no structure burned damage is found. The reliability of the film-cooling igniter and multiple starts is verified. With simulation results, it is showed that the relative distance between the injectors has an important influence on the thermal protective effect of film cooling. Using multi-rows of methane injectors is an optimized scheme consideration to ignition reliability and thermal protective effect.

rocket engine igniter  /  LOX/CH4 engines  /  electronic igniter  /  ignition test  /  CFD simulation
Xinpeng LIU, Weixin JI, Yan SHAO. Design and Influencing Factors Analysis of a GO2/GCH4 Torch Igniter[J]. Missiles and Space Vehicles, 2026 , (3) : 24 -30 . DOI: 10.7654/j.issn.2097-1974.20260304
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doi: 10.7654/j.issn.2097-1974.20260304
  • Receive Date：2025-03-27
  • Online Date：2026-07-22
  • Published：2026-06-25
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  • Received：2025-03-27
  • Revised：2026-05-28
Affiliations
    Expace Technology Co. , Ltd. , Wuhan, 430415
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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