基于微型涡流发生器的横向射流被动控制研究

发布时间：2018-10-08 19:24

【摘要】：微型涡流发生器放置于喷孔上游,采用纳米粒子平面激光散射(Nano-particle Planer Laser Scattering,NPLS)对微型涡流发生器诱导下的超声速横向射流进行了层析观测,并采用粒子图像测速(Particle Image Velocimetry,PIV)方法计算了观测区域速度分布。对不同流向位置的穿透边界和横向扩散进行提取和统计平均,发现引入涡流发生器后射流穿透边界比未引入时提高了27%左右,而横向扩散最高提高了12.6%。分析涡流发生器尾迹速度场发现,尾迹在射流穿透方向上的诱导速度对射流穿透深度有重要作用,尾迹与射流在近场区域的相互作用是影响射流穿透深度和横向扩散的关键因素。
[Abstract]:The micro eddy current generator is placed in the upstream of the jet hole. The transverse supersonic jet induced by the micro eddy current generator is measured by tomography using plane laser scattering (Nano-particle Planer Laser Scattering,NPLS) of nanoparticles. The particle image velocimetry (Particle Image Velocimetry,PIV) method is used to calculate the velocity distribution in the observed region. The penetration boundary and lateral diffusion of different flow directions were extracted and statistically averaged. It was found that the jet penetration boundary was increased by about 27% after the introduction of the eddy current generator, while the transverse diffusion was increased by 12.6g. By analyzing the wake velocity field of the vortex generator, it is found that the induced velocity of the wake in the jet penetration direction plays an important role in the penetration depth of the jet. The interaction between wake and jet in near field is the key factor to influence the penetration depth and transverse diffusion of jet.
【作者单位】：国防科技大学高超声速冲压发动机技术重点实验室;
【基金】：国家自然科学基金(11472304)
【分类号】：V235.21

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