Optimal design of nozzle for hypersonic vehicle
-
摘要: 以喷管上壁折转角、下壁长度、舵面长度及其折转角为设计变量,结合遗传算法和特征线法对高超声速飞行器尾喷管进行了优化设计,并对设计变量进行了参数研究.结果表明,所采用的优化设计方法计算效率高且比较准确,特别适合于高超声速飞行器尾喷管的优化设计;所采用的4个设计参数均能有效地影响尾喷管的气动性能,其中喷管上壁折转角和舵面折转角分别对喷管的升力和推力的影响相对明显,对其进行均衡选择方能得到最优的结果.Abstract: An optimal design procedure was proposed by utilizing the method of characteristics in conjunction with a multi-island genetic algorithm. The reflection angle of the nozzle upper wall, the length of the lower wall, and the flap length and angle were chosen to be the design variables, and a parametric study with respect to these variables was performed. The numerical results demonstrate that the proposed procedure is highly efficient, and capable of providing sufficiently accurate data for nozzle optimal design. It is also found that all four parameters chosen as the design variables will substantially affects the aerodynamic performances of the nozzle, among them, the reflection angle of the nozzle upper wall and the flap have remarkable influence on lift and thrust respectively. Hence, the trade-off among these variables must be taken into account to achieve the optimum result.
-
Key words:
- nozzles /
- optimization /
- genetic algorithms /
- method of characteristics
-
[1] Park H K. Model of an aero-space plane based on an idealized cone-derived waverider forebody . PH.D. Thesis, University of Oklahoma, 1990 [2] O-Neill M K L. Optimized scramjet engine integration on a waverider airframe . PhD thesis, University of Maryland, 1992 [3] Takashima N. Optimization of waverider-based hypersonic vehicle designs .MPhD thesis, University of Maryland, 1997 [4] 陈兵, 徐旭, 蔡国飙. 二维超燃冲压发动机尾喷管优化设计[J]. 推进技术, 2002, 23(5): 433-437 Chen Bing, Xu Xu, Cai Guobiao. Optimization design of two dimensional scramjet nozzle based on N-S equations [J]. Journal of Propulsion Technology, 2002, 23(5): 433-437(in Chinese) [5] Javaid K H, Serghides V C. Thrust-matching requirements for the concept design of hypersonic waverider vehicles [J]. J Aircraft, 2005, 42(4): 1055-1064 [6] Edwards C L Q, Small W J, Weidner J P. Studies of scramjet/airframe integration techniques for hypersonic aircraft . AIAA 75-2581, 1975 [7] Shapiro A H. The dynamics and thermodynamics of compressible fluid flow [M]. Vol.1. New York: McGraw- Hill Book Co, 1953 [8] 周明, 孙树栋. 遗传算法原理及应用[M]. 北京:国防工业出版社, 1999 Zhou Ming, Sun Shudong. Genetic algorithms: theory and applications [M]. Beijing: National Defense Industry Press, 1999(in Chinese) [9] Eckert E R G. Engineering relations for heat transfer and friction in high-velocity laminar and turbulent boundary-layer flow over surfaces with constant pressure and temperature [J]. Trans ASME, 1956, 78: 1273-1284 [10] Zheng B, Lee C H. The effects of limiters on high resolution computations of hypersonic flows over bodies with complex shapes [J]. Comm Nonlin Sci Numer Simul, 1998, 3(2): 82-87 -
点击查看大图
计量
- 文章访问数: 2948
- HTML全文浏览量: 154
- PDF下载量: 1123
- 被引次数: 0
下载:
