红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
2期
369-374
,共6页
朱晨光%许春根%薛锐%张涪%李燕
硃晨光%許春根%薛銳%張涪%李燕
주신광%허춘근%설예%장부%리연
数学模型%烟火药火焰%正在燃烧粒子%分布%PIV
數學模型%煙火藥火燄%正在燃燒粒子%分佈%PIV
수학모형%연화약화염%정재연소입자%분포%PIV
mathematic model%pyrotechnic flame%burning particles%distribution%PIV
烟火药火焰中正在燃烧粒子的流场与空间分布对于其点火与辐射性能起着非常重要作用。首先基于烟火药火焰流场的喷射初速等参数建立粒子轨迹模型;然后利用高速摄影仪(HSC),通过调整曝光时间辨析烟火药燃烧火焰中正在燃烧粒子,采用图像处理技术得到粒子的坐标位置和速度矢量,印证粒子轨迹模型并进行修正,从而得到正在燃烧粒子速度分布规律;利用粒子图像速度场仪(PIV)测试烟火药的火焰流场,并与粒子流场进行对比分析。结果显示:正在燃烧粒子形成的流场与火焰流场方向一致,等速区域轮廓有较大差别。随着火焰的升高,火焰流场有收敛趋势,而正在燃烧粒子成离散性。
煙火藥火燄中正在燃燒粒子的流場與空間分佈對于其點火與輻射性能起著非常重要作用。首先基于煙火藥火燄流場的噴射初速等參數建立粒子軌跡模型;然後利用高速攝影儀(HSC),通過調整曝光時間辨析煙火藥燃燒火燄中正在燃燒粒子,採用圖像處理技術得到粒子的坐標位置和速度矢量,印證粒子軌跡模型併進行脩正,從而得到正在燃燒粒子速度分佈規律;利用粒子圖像速度場儀(PIV)測試煙火藥的火燄流場,併與粒子流場進行對比分析。結果顯示:正在燃燒粒子形成的流場與火燄流場方嚮一緻,等速區域輪廓有較大差彆。隨著火燄的升高,火燄流場有收斂趨勢,而正在燃燒粒子成離散性。
연화약화염중정재연소입자적류장여공간분포대우기점화여복사성능기착비상중요작용。수선기우연화약화염류장적분사초속등삼수건립입자궤적모형;연후이용고속섭영의(HSC),통과조정폭광시간변석연화약연소화염중정재연소입자,채용도상처리기술득도입자적좌표위치화속도시량,인증입자궤적모형병진행수정,종이득도정재연소입자속도분포규률;이용입자도상속도장의(PIV)측시연화약적화염류장,병여입자류장진행대비분석。결과현시:정재연소입자형성적류장여화염류장방향일치,등속구역륜곽유교대차별。수착화염적승고,화염류장유수렴추세,이정재연소입자성리산성。
The spatial distribution of burning particles in the pyrotechnic flame play an important role in the ignition and spectral radiance of the pyrotechnic. The first, the local model of the burning particles was built based on the parameters of initial velocity. The second, the sharply focused images of the burning particles in pyrotechnic flame were shot by the high speed camera (HSC) photography, and then coordinate position and velocity vector were analyzed by the image processing techniques. As a result, the local model of the burning particles was corroborated and revised, thus the regulation of velocity distribution was derived. Particle image velocimetry (PIV) was used to investigate the spatial pattern and velocity of burning particles in the flame of pyrotechnics. The investigation result shows that the direction of main burning particles matches the fluid field of flame, but the contour profile of velocity exist large difference.