發(fā)布時間：2019-01-22 21:23

【摘要】：采用二級輕氣炮驅(qū)動飛片高速沖擊樣品管引發(fā)管中Ti-Si活性粉體的自蔓延反應(yīng),研究在沖擊加載條件下,Ti-Si活性粉體中沖擊波速度與燃燒反應(yīng)速度的關(guān)系。在實驗過程中,采用高速相機(jī)對自蔓延反應(yīng)過程中燃燒波和沖擊波的傳播速度進(jìn)行測量。實驗結(jié)果表明:沖擊波在活性粉體中的傳播速度接近飛片運(yùn)動的初始速度,并且隨著傳播距離的增加,沖擊波速度明顯減小,這一現(xiàn)象在沖擊加載純Si粉的過程中也得到驗證;在沖擊加載條件下,活性粉體中燃燒反應(yīng)的燃燒波以每秒幾厘米的速度傳播,與沖擊波在活性粉體中的傳播速度相差巨大,未發(fā)現(xiàn)兩者相互作用的過程,即未出現(xiàn)沖擊波傳播速度增加的現(xiàn)象。
[Abstract]:The self-propagating reaction of the Ti-Si active powder in the sample tube was driven by a two-stage light gas gun. The relationship between the shock wave velocity and the combustion reaction rate of the Ti-Si active powder was studied under the shock loading condition. In the process of experiment, high speed camera is used to measure the propagation velocity of combustion wave and shock wave in the process of self-propagating reaction. The experimental results show that the propagation velocity of shock wave in active powder is close to the initial velocity of flyer motion, and with the increase of propagation distance, the velocity of shock wave decreases obviously. This phenomenon is also verified in the process of shock loading pure Si powder. Under the shock loading condition, the combustion wave of the combustion reaction in the active powder propagates at a velocity of several centimeters per second, which differs greatly from the velocity of the shock wave propagating in the active powder. That is, there is no increase in the velocity of shock wave propagation.
【作者單位】： 北京理工大學(xué)爆炸科學(xué)與技術(shù)國家重點(diǎn)實驗室;
【基金】：國家自然科學(xué)基金(11172043)
【分類號】：TB383.3
，

本文編號：2413567