Simultaneous imaging of temperature and mole fraction using acetone planar laser-induced fluorescence
Simultaneous imaging of temperature and mole fraction using acetone planar laser-induced fluorescence
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DOI：
10.1007/s003480000142
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发表时间：
2001-01
影响因子：
2.4
通讯作者：
M. Thurber;R. Hanson
中科院分区：
文献类型：
--
作者：
M. Thurber;R. Hanson
丙酮PLIF浓度成像在混合研究中已变得流行。最近，丙酮荧光的温度依赖性的研究，使定量成像的温度使用单或双波长激发策略。我们在这里提出的第一个演示的同时成像的温度和摩尔分数与丙酮PLIF。激光激发在248和308 nm处;所得荧光图像由能够以小至500 ns的时间间隔获取两帧的行间转移CCD相机捕获。除了增加温度成像能力外，这种双波长方法还可以在非等温流中精确测量摩尔分数。在一个加热的湍流射流的测试表明，能够记录瞬时的摩尔分数和温度结构。观察到的温度和浓度场的预期对应关系，并且从图像平均得到的这些量的平均值示出了射流充分发展时的预期径向和中心线轮廓。
Imaging of concentration with acetone PLIF has become popular in mixing investigations. More recently, studies of the temperature dependences of acetone fluorescence have enabled quantitative imaging of temperature using single- or dual-wavelength excitation strategies. We present here the first demonstration of simultaneous imaging of temperature and mole fraction with acetone PLIF. Laser excitation is at 248 and 308 nm; the resulting fluorescence images are captured by an interline transfer CCD camera capable of acquiring two frames with a separation in time of as little as 500 ns. In addition to adding temperature imaging capability, this dual-wavelength approach enables mole fraction to be accurately measured in non-isothermal flows. Tests in a heated turbulent jet demonstrate the ability to record instantaneous mole fraction and temperature structure. The expected correspondence of the temperature and concentration fields is observed, and mean values of these quantities derived from image averaging show the expected radial and centerline profiles as the jet becomes fully developed.