轴对称洞室超声速下的多模态脉动

IF 0.3 Q4 MATHEMATICS

Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2021-11-25 DOI:10.25205/2541-9447-2017-12-2-119-128

D. Gubanov, V. Zapryagaev

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引用次数: 0

摘要

给出了2马赫数超声速条件下轴对称腔体流动结构和压力脉动谱特性的实验研究结果。观测到多模脉动的存在。不同的模式在不同的时间时刻占主导地位。一个模态振幅的最大值对应于另一个模态振幅的最小值。模式调优本质上是偶然的。一个模态存在的时间远远大于一个模态振荡周期。确定了脉动模式以环形和螺旋扰动的形式存在。数值计算结果定性地再现了多模态波动，与实验数据相吻合

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Multimode Pulsations In The Axisymmetric Cavern At Supersonic Flow

Experimental study results of flow structure and pressure pulsation spectral characteristics of axisymmetric cavern at supersonic flow with Mach number 2 is presented. Multimode pulsation existence is observed. Different modes dominate in different time moments. Maximum of one mode amplitude correspond to minimum value of another. Mode tuning nature is incidental. Time of one mode existence is much more than one of mode oscillation period. It is determine that pulsation mode exist in the form of toroidal and helical disturbances. Numerical calculation results qualitative reproduce multimode fluctuation and corresponded to experimental data

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来源期刊

Journal of Siberian Federal University-Mathematics & Physics MATHEMATICS-

CiteScore

0.90

自引率

0.00%

发文量