火焰射流在横向气流中喷射特性的试验

Experimental study of the characteristics of flame jet in crossflow

National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要: 研究了火焰射流垂直喷射到横向气流中的喷射特性.试验在常温常压下进行,研究了横向主流和射流流动参数对火焰射流穿透深度和温度特性的影响规律,得到了火焰射流温度分布随主流速度的变化规律及射流透入深度与动量比之间的经验关系式.研究结果表明,沿着射流轨迹方向射流温度逐渐降低,射流边界变宽.火焰射流的穿透深度随动量比的增大而增大.在相同的动量比下,火焰射流的穿透深度比常温射流的穿透深度大.
- 火焰射流 /
- 横向主流 /
- 穿透特性 /
- 温度特性
Abstract: The characteristics of flame jet into crossflow were experimentally investigated.The influences of the parameters of jet and main flow on jet penetration depth and temperature characteristics were studied under atmospheric pressure and temperature.The temperature field of jet flame and an expression of jet penetration depth were attained.Results show that the temperature of the flame jet decreases and boundary of the jet is widened along the jet trajectory.The penetration depth of jet flame increases with increasing ratio of jet and main flow's momentum.And,the penetration depth of jet flame was larger than cool jet under the same ratio of momentum.
- flame jet /
- crossflow /
- penetration characteristics /
- temperature characteristics

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