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利用脉动压力测量技术，研究细长旋成体底部流动非定常特性，实验M数0．6～3．5。实验中对不同后体构型（圆柱后体和圆锥后体）模型进行测量，通过对测得的功率谱密度曲线、脉动压强均方根值以及相关函数等结果的分析比较，探讨底部流动非定常特性的某些规律以及模型外形等因素的影响。
Using the fluctuating pressure measurement technique, the unsteady behavior of flow at the bottom of the slender body is studied. The experimental M numbers are 0.6-3.5. In the experiment, the models of different posterior structures (cylindrical posterior body and conic posterior body) were measured. By analyzing and comparing the measured power spectral density curve, root mean square value of pulsatile pressure and correlation function, Some regularities of the regularity and the influence of the shape of the model and other factors.