【摘要】：微型渦流發(fā)生器放置于噴孔上游,采用納米粒子平面激光散射(Nano-particle Planer Laser Scattering,NPLS)對(duì)微型渦流發(fā)生器誘導(dǎo)下的超聲速橫向射流進(jìn)行了層析觀測(cè),并采用粒子圖像測(cè)速(Particle Image Velocimetry,PIV)方法計(jì)算了觀測(cè)區(qū)域速度分布。對(duì)不同流向位置的穿透邊界和橫向擴(kuò)散進(jìn)行提取和統(tǒng)計(jì)平均,發(fā)現(xiàn)引入渦流發(fā)生器后射流穿透邊界比未引入時(shí)提高了27%左右,而橫向擴(kuò)散最高提高了12.6%。分析渦流發(fā)生器尾跡速度場(chǎng)發(fā)現(xiàn),尾跡在射流穿透方向上的誘導(dǎo)速度對(duì)射流穿透深度有重要作用,尾跡與射流在近場(chǎng)區(qū)域的相互作用是影響射流穿透深度和橫向擴(kuò)散的關(guān)鍵因素。
[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.
【作者單位】： 國防科技大學(xué)高超聲速?zèng)_壓發(fā)動(dòng)機(jī)技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(11472304)
【分類號(hào)】：V235.21

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