| 单边膨胀喷管红外辐射特性的数值模拟 |
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| 引用本文： | 杨承宇,张靖周,单勇.单边膨胀喷管红外辐射特性的数值模拟[J].航空学报,2010,31(10):1919-1926. |
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| 作者姓名： | 杨承宇 张靖周 单勇 |
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| 作者单位： | 南京航空航天大学,能源与动力学院,江苏,南京,210016 |
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| 摘 要： | 通过计算流体力学/红外辐射(CFD/IR) 数值模拟的方法,研究了单边膨胀喷管(SERN)膨胀边开缝、膨胀边倾斜角度和喷管收敛通道面积比这3个结构参数对单边膨胀喷管气动性能和红外辐射特性的影响规律。模拟结果表明：单膨胀边上开缝后,红外辐射强度有较为显著的下降,气动性能也得到改善;其中, xOz 坐标平面尾焰红外辐射强度峰值下降26.4%, yOz 坐标平面尾焰红外辐射强度峰值下降25.2%,单膨胀边壁面平均温度从643 K下降到335 K左右;单膨胀边倾斜角度增大,使得喷管推力矢量角增大,轴向推力系数减小，对高温内壁面和喷管尾焰的遮挡效果减弱;收敛通道面积比的增大使喷管红外辐射强度降低的同时,也使喷管的推力相应减小。
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| 关 键 词： | 单边膨胀喷管 壁面冷却 气动性能 红外辐射 数值模拟 |
Numerical Simulation on Infrared Radiation Characteristics of Single Expansion Ramp Nozzles |
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| Yang Chengyu,Zhang Jingzhou,Shan Yong.Numerical Simulation on Infrared Radiation Characteristics of Single Expansion Ramp Nozzles[J].Acta Aeronautica et Astronautica Sinica,2010,31(10):1919-1926. |
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| Authors: | Yang Chengyu Zhang Jingzhou Shan Yong |
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| Institution: | Yang Chengyu,Zhang Jingzhou,Shan Yong(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Based on computational fluid dynamics/infrared radiation (CFD/IR) numerical simulation method,this article reveals the influence of different structures on the pneumatic and infrared radiation characteristics of a single expansion ramp nozzle (SERN),including gaps on the ramp,angle of the ramp and area ratio of the nozzle.The results show that infrared radiation intensity is decreased obviously and the pneumatic performance is also improved when a series of gaps are made on the ramp.The peak value of plume ... |
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| Keywords: | single expansion ramp nozzle wall cooling pneumatic performance infrared radiation numerical simulation |
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