王一帆, 秦启豪, 关瑞卿, 等. 支杆–钝体流场振荡试验研究及统计分析[J]. 实验流体力学, doi: 10.11729/syltlx20220078.
引用本文: 王一帆, 秦启豪, 关瑞卿, 等. 支杆–钝体流场振荡试验研究及统计分析[J]. 实验流体力学, doi: 10.11729/syltlx20220078.
WANG Y F, QIN Q H, GUAN R Q, et al. Experimental study and statistical analysis of flow field pulsation of spiked cylinder[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20220078.
Citation: WANG Y F, QIN Q H, GUAN R Q, et al. Experimental study and statistical analysis of flow field pulsation of spiked cylinder[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20220078.

支杆–钝体流场振荡试验研究及统计分析

Experimental study and statistical analysis of flow field pulsation of spiked cylinder

  • 摘要: 针对超声速来流条件下支杆–钝体流场的非定常振荡现象,基于直连式风洞试验台与高速纹影测量系统,在Ma = 2.2来流条件下对尖头支杆–钝体构型与气动圆顶支杆–钝体构型开展了试验研究,并对试验结果进行了统计分析。首先根据瞬态结果对流场典型结构与演化历程进行了解释,随后通过残差收敛历程对统计结果的可靠性做出了评估,最后从时均流场和脉动流场两个方面进一步分析了流场的振荡特性。结果表明,超声速来流条件下的支杆–钝体流场存在着非定常的流场振荡现象,且在尖头支杆–钝体构型中更加剧烈,在气动圆顶支杆–钝体构型中有所衰减,证明了气动圆顶支杆对流场的非定常振荡具有抑制作用。

     

    Abstract: The cylinder with a pointed spike and the spiked cylinder with aerodome were investigated under the condition of Ma = 2.2 incoming flow using a direct-connected wind tunnel and a high-speed schlieren system. The experimental results were statistically analyzed to investigate the unsteady flow field pulsation of the spiked cylinder under supersonic incoming flow. Based on the transient data, the typical structure and evolution of the flow field were first interpreted. The convergence of the residuals was then used to assess the dependability of the statistical results. Finally, the pulsation characteristics of the flow field were further analyzed in terms of the time-averaged and pulsating flow fields. The results show that there is unsteady pulsation in the spiked cylinder flow field under the condition of the supersonic incoming flow, which is more intense in the case of the cylinder with a pointed spike and attenuated in the case of the spiked cylinder with aerodome, demonstrating the suppression of unsteady pulsation in the flow field by the aerodome.

     

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