| 台阶后横喷氢气超音速燃烧流场数值模拟研究 |
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| 引用本文： | 刘陵,张榛,胡欲立,孙惠贤,刘敬华.台阶后横喷氢气超音速燃烧流场数值模拟研究[J].推进技术,1996,17(2):1-7,13. |
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| 作者姓名： | 刘陵 张榛 胡欲立 孙惠贤 刘敬华 |
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| 作者单位： | 西北工业大学航空动力与热力工程系，航天工业总公司３１所 |
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| 摘 要： | 采用ＭｃＣｏｒｍａｃｋ格式、代数涡粘性湍流模型及有限速率化学动力学模型，用数值模拟方法研究了台阶后横喷氢气二元燃烧流场。数值计算结果表明：台阶的作用不仅能扩大火焰稳定性，而且增加氢射流对主流的穿透深度，提高燃烧效率；当进口气流Ｍ数越高，进口温度越高，油气当量比越接近于恰当比，壁面温度对流场的影响越大。还提出了在超音速气流中，横喷氢自动着火时滞的火焰稳定机理新观点，由此可更准确地预估自动着火点的位置及火焰稳定性。
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| 关 键 词： | 超音速冲压喷气发动机，超音速燃烧，数值模拟 |
A NUMERICAL SIMULATION ON SUPERSONIC FLOW OVER A REARWARD FACING STEP WITH TRANSVERSE HYDROGEN INJECTION |
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| LiuLing,ZhangZhen,HuYuLi,SunHuiXian and LiuJingHua.A NUMERICAL SIMULATION ON SUPERSONIC FLOW OVER A REARWARD FACING STEP WITH TRANSVERSE HYDROGEN INJECTION[J].Journal of Propulsion Technology,1996,17(2):1-7,13. |
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| Authors: | LiuLing ZhangZhen HuYuLi SunHuiXian and LiuJingHua |
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| Institution: | The 31st Research Inst., Beijing, 100074;The 31st Research Inst., Beijing, 100074;The 31st Research Inst., Beijing, 100074;The 31st Research Inst., Beijing, 100074;The 31st Research Inst., Beijing, 100074 |
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| Abstract: | A detailed theoretical examination of flow over a rearward facing step is presented,using a two-step global hydrogen-air combustion model, Baldwin-Lomax's algebraic eddy-viscositymodel and MacComack explicit time-split method. The results show that rearward facing step is quiteuseful for autoignition, flame stabilization and combustion efficiency, and that the flowfield is affectedby the wall tempeture boundary condition. A new concept on autoignition and stabilization ofhydrogen in supersonic flow is provide in the paper by which the position of autoignition point andstabilization can be assessed. |
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| Keywords: | Supersonic combustion ramjet engine Supersonic combustion Numerical simulation |
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