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兵工学报  2015 

环境压力降低对底排二次燃烧影响的数值模拟

DOI: 10.3969/j.issn.1000-1093.2015.03.010, PP. 443-450

Keywords: 兵器科学与技术,底部排气,二次燃烧,数值模拟,尾部流场,化学非平衡流

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Abstract:

?为了揭示高空低压环境下底排减阻率减小的机理,建立底排装置尾部流场的化学非平衡流数学物理模型。其中二次燃烧模型采用10组分25步反应的H2-CO燃烧模型,运用统一算法的思路编程求解二维轴对称方程组,对底排尾部流场进行数值模拟。模拟结果和实验进行对比验证,基本吻合。在此基础上,对底排尾部流场以及燃烧特性进行数值预测,研究环境压力降低对底排尾部二次燃烧的影响。结果表明:二次燃烧对底部加能的贡献是热排气的6.4倍,是底排加能减阻的关键;随着环境压力的降低,模型尾部的环状回流区内H2的燃烧效率逐渐降低,中间产物H逐渐增多,燃烧逐渐变得不充分,导致底排减阻率明显下降。

References

[1]  [1] 丁则胜,邱光纯,刘亚飞,等.固体燃料底部排气空气动力研究[J].空气动力学学报, 1991, 9(3):300-307.
[2]  [2] Mathur T, Dutton J C. Velocity and turbulence measurements in a supersonic base flow with mass bleed[J]. AIAA Journal, 1996, 34(6):1153-1159.
[3]  [3] Bourdon C J, Dutton J C. Visualization of a central bleed jet in an axisymmetric compressible base flow[J]. Physics of Fluids, 2003, 15(2):499-510.
[4]  [6] 丁则胜,陈少松,刘亚飞,等.底排性能的环境压力效应[J]. 弹道学报, 2002, 14(1):88-92.
[5]  [7] Sahu J, Nietubicz C J, Steger J L. Navier-Stokes computations of projectile base flow with and without base injection[J]. AIAA Journal, 1985, 23(9):1348-1355.
[6]  [8] Gibeling H J, Buggeln R C. Projectile base bleed technology part 1:analysis and results,AD-A258459[R]. Glastonbury, CT:Scientific Research Associates, 1992.
[7]  [9] Jachimowski C J. An analytical study of the hydrogen-air reaction mechanism with application to scramjet combustion, NASA-TP-2791[R].Hampton, VA:Langley Research Center, 1988.
[8]  [10] 陆中兵,丁珏,周彦煌,等.超声速飞行底部排气弹三维湍流流场数值模拟[J].南京理工大学学报,2007, 31(1): 27-30.
[9]  [11] 陈新虹,黄华,周志超,等.排气能量对底部排气弹气动特性影响的数值模拟[J].兵工学报,2010, 31(4):447-452.
[10]  [12] Shin J R, Cho D R, Won S H, et al. Hybrid RANS/LES study of base-bleed flows in supersonic mainstream[C]∥15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference. Dayton, Ohio:AIAA,2008.
[11]  [13] Shin J R, Choi J Y. DES study of base and base-bleed flows with dynamic formulation of DES constant[C]∥49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. Orlando, Florida:AIAA,2011.
[12]  [14] Menter F R. Two-equation eddy-viscosity turbulence models for engineering application[J]. AIAA Journal, 1994, 32(8):1598-1605.
[13]  [15] 余文杰,余永刚,倪彬. 底部排气圆柱体模型尾部流场的数值模拟[J]. 弹道学报, 2014, 26(1):7-12.
[14]  [16] 代淑兰,许厚谦,王兵. 含高速运动弹丸的膛口二次燃烧并行数值模拟[J].弹道学报, 2009, 21(1):83-86.
[15]  [17] 武频, 赵润祥, 郭锡福.弧长网格生成法及其应用[J].南京理工大学学报, 2002,26(5):482-485.
[16]  [18] Jachimowski C J. An analytical study of the hydrogen-air reaction mechanism with application to scramjet combustion, NASA-TP-2791[R].Washington, DC:NASA, 1988.
[17]  [19] Gardiner W C. Combustion chemistry[M]. New York: Springer-Verlag, 1984.
[18]  [20] 刘君,张涵信,高树椿.一种新型的计算化学非平衡流动的解耦方法[J].国防科技大学学报, 2000,22(5):19-22.
[19]  [21] 梁德旺, 王可.AUSM+格式的改进[J].空气动力学学报, 2004, 22(4):404-409.
[20]  [22] Yoon S, Jameson A. Lower-upper symmetric Gauss-Seidel method for the Euler and Navier-Stokes equations[J]. AIAA Journal, 1988, 26(9):1025-1026.
[21]  [23] 刘晨.复杂燃烧流场数值模拟方法研究[D].南京:南京航空航天大学, 2009.
[22]  [4] Bowman J E, Clayden W A. Cylindrical afterbodies at M=2 with hot gas ejection[J]. AIAA Journal, 1968, 6(12): 2429-2431.
[23]  [5] 丁则胜, 罗荣,陈少松,等.底部燃烧减阻性能的若干参数影响研究[J].弹道学报, 1996, 8(4):79-83.

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