期刊文献+

导弹纵向俯仰气动特性数值分析 被引量:4

Numerical Investigation of Unsteady Aerodynamic Characteristics of a Pitching Missile
下载PDF
导出
摘要 应用有限体积方法求解三维可压缩雷诺平均N-S方程,计算了某型巡航导弹的静、动态绕流流场和空气动力特性。湍流模型应用修正后的B-L代数湍流模型。以细长旋成体绕流流场为例进行数值计算,并和实验数据相比较,验证了本文方法的可靠性,在此基础上,开展了某型巡航导弹绕不同转轴和以不同频率进行俯仰振动的非定常气动力迟滞特性研究。计算结果表明,当导弹作快速俯仰振动时,在上仰和下俯过程中的同一迎角瞬间,绕导弹流场流动明显不同,表现出明显的非定常迟滞特性。并且,导弹的非定常气动力迟滞特性随振动频率的增大变化明显,且气动力迟滞曲线随着振动轴位置的变化而变化。 Three dimensional Reynolds averaged Navier-Strokes numerical simulations were carried out to predict the flowfield characteristics of a winged missile based on the finite volume method. Baldwin-Lomax eddy viscosity model with the modifications suggested by Degani and Schiff was used here. The computational results of the aerodynamic loads of a slender revolution body were given, and well agree with experiment data. The unsteady aerodynamics about a winged missile, which is oscillated in pitching with different frequencies and different oscillating positions are also shown. The properties of unsteady aerodynamics in these cases were researched here. It finds that from the computational results, the unsteady hysteresis of the lift, drag and pitch moment coefficients vary significantly not only with the frequency, but also with the position of oscillating axis when the missile pitches very fast.
出处 《力学季刊》 CSCD 北大核心 2009年第2期201-209,共9页 Chinese Quarterly of Mechanics
关键词 非定常流动 数值计算 迟滞特性 unsteady flow computational method hysteresis
  • 相关文献

参考文献5

二级参考文献36

  • 1高正红.关于绕任意机翼非定常流动的一种无条件稳定的欧拉方程解[J].应用数学和力学,1995,16(12):1123-1134. 被引量:6
  • 2[1]Rumsey C L. A Comparison of Predictive Capabilities of Several Turbulence Models Using Upwind and Central-Difference Computer Codes. AIAA Paper 93-0192, 1993
  • 3[2]Sturek W B, et al. The Application of CFD to the Prediction of Missile Body Vortices. AIAA Paper 97-0637, 1997
  • 4[3]Swanson R C, Turkel E. On Central-Difference and Upwind Schemes. Journal of Computational Physics, 1992, 101: 292~306
  • 5[4]Baldwin B S, Lomax H. Thin Layer Approximation and Algebraic Model for Separated Turbulent Flows. AIAA Paper 78-257, 1978
  • 6[5]Abid R, Vatsa V N, Johnson D A, Wedan B W. Prediction of Separated Transonic Wing Flows with Nonequilibrium Algebraic Turbulence Model. AIAA Journal, 1990, 28(8): 1426~1431
  • 7[6]Johnson D A. Nonequilibrium Algebraic Turbulence Modeling Considerations for Transonic Airfoils and Wings. AIAA Paper 92-0026, 1992
  • 8[7]Josyula E. Computational Study of High-Angle-of-Attack Missile Flows Using Two-Equation Turbulence Models.AIAA Paper 98-0525, 1998
  • 9[1]Baldwin B S,Lomax H. Thin Layer Approximation and Algebraic Model for Separated Turbulent Flows. AIAA Paper 78-257,1978
  • 10[2]Abid R,et al. Prediction of Separated Transonic Wing Flows with Nonequilibrium Algebraic Turbulence Model. AIAA Journal,1990,28(8): 1426~1431

共引文献32

同被引文献50

引证文献4

二级引证文献11

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部