在线等英语论文翻译,谢绝使用翻译器的2.2. Measurement systemA comprehensive survey of the two-colours laser-induced fluorescenceapplied to the temperature measurement of single componentdroplets can be found in [13,14]. It has been ext

在线等英语论文翻译,谢绝使用翻译器的2.2. Measurement systemA comprehensive survey of the two-colours laser-induced fluorescenceapplied to the temperature measurement of single componentdroplets can be found in [13,14]. It has been ext
在线等英语论文翻译,谢绝使用翻译器的
2.2. Measurement system
A comprehensive survey of the two-colours laser-induced fluorescence
applied to the temperature measurement of single component
droplets can be found in [13,14]. It has been extended by
a third detection band as described by Maqua et al. [12] to address
the case of binary droplets. The technique requires the seeding of
the fuel by a low concentration of a temperature sensitive fluorescent
dye (rhodamine B in the present case). The fluorescence of
rhodamine B is induced by the green line of the argon ion laser
(k = 514.5 nm) and its intensity is then detected on three separate
spectral bands. An important feature for the measurement of the
droplet temperature is that the ratios of the fluorescence intensities
of these bands are independent on the dimensions of the
detection volume, the local laser intensity and the tracer concentration
and only depends on the temperature and the composition
of the droplet. Additionally, a reference measurement is required
to infer the temperature of the droplets from the intensity ratios.
This reference is performed at ambient temperature (i.e. with the
hot air generator turned off), on the liquid cylindrical jet before
its disintegration into droplets. In these conditions, the temperature
can be safely assumed to correspond to the temperature measured
in the injector by means of the thermocouple and zhe
ethanol volume fraction of the liquid is the same as in the injector.
Two laser beams are focused into the LDA measuring volume,
which is also the probe volume of the fluorescence measurements.
The fluorescence signal is detected at right angle by an achromatic
doublet connected to an optical fiber. The laser light (k = 514.5 nm)
coming from the droplets is eliminated by a notch filter in order to
detect only the fluorescence emission. The fluorescence signal is
then divided in the three spectral bands by a set of beamsplitters
and interference filters (Fig. 2). The detection is performed by
means of three photomultipliers. Finally, the signal processing is
performed by a multi-channel acquisition board with a sampling
rate of 5 MHz. The accuracy of the temperature measurement is
about 1.3 \2C. However the characterization of the ethanol volume
fraction is less accurate and estimated at about 4%.
At this stage, it should be added that the evolution of the droplet
sizes is not measured, but the initial diameter is determined by
a measurement of the fuel flowrate Q at the injector exit. The droplet
size D0 is then inferred from:
D0 ¼ ð6Q=pf Þ1=3 ð1Þ
where f denotes the piezoceramic frequency.

在线等英语论文翻译,谢绝使用翻译器的2.2. Measurement systemA comprehensive survey of the two-colours laser-induced fluorescenceapplied to the temperature measurement of single componentdroplets can be found in [13,14]. It has been ext
2.2 测量系统
关于两色激光诱导荧光在单组分液滴的温度测量中的应用的综合考察,在[13,14]中可以找到.这一论述已经被马克伊特尔[12]延伸到第三检测频用于处理双组分液滴的情况.该技术需要低浓度的对温度敏感的荧光染料（本案中的罗丹明B ）.罗丹明B的荧光被绿线上的氩离子激光诱发（K = 514.5纳米） ,其强度也在三个不同的光谱带检测到.液滴温度的测量的一个重要特点是,这些条带的荧光强度的比率是独立于所检测物体的尺寸的.本地的激光强度和示踪剂浓度与仅与液滴的温度和组成成分有关.另外,推断性测量是必需的,它主要用于根据强度比推断出液滴的温度.
这个说明是在室温下进行的（例如：关闭热空气发生器）,在液体圆柱形解体成水滴前喷射.满足这些条件的情况下,温度可以安全地假定为和在喷射器测得的温度是相对应的.而这个温度与在喷射器中通过热电偶和液体的乙醇体积分数测得的温度是相同的.
两个激光束聚焦到LDA测量容器内,容积的大小正好这也是荧光测量探头体积大小.以正确的角度检测到的荧光信号由消色差双合透镜连接到光纤.为了只检测荧光发射,来自液滴的激光（K = 514.5纳米）将被陷波滤波器消除.紧接着荧光信号被一组分束器和干涉滤光器分为三个光谱带（图2 ）.检测采用3个了光电倍增管的装置.最后的信号处理过程是通过一个采样速率为5 MHz的多通道采集板.温度测量的误差大约是1.3摄氏度.然而,这里乙醇体积分数的表征是不准确的,估计误差为约4％ .在这个阶段,应该补充说,我们还没有测量液滴尺寸的演变过程,但初始直径是由测量到的喷射器出口处的燃料流量Q决定的.
The droplet size D0 is then inferred from:（液滴大小D0的推断公式：）
（此处公式省略）
where f denotes the piezoceramic frequency.
其中,f表示压电陶瓷的频率

2.2。这两种颜色的激光诱导fluorescenceapplied测量细丝特磨综合调查的单componentdroplets温度测量可以发现在[ 13,14 ]。它一直延伸一第三检测带的maqua等人描述。[ 12 ]，二进制滴下。该技术需要播种的燃料的温度敏感fluorescentdye低浓度（罗丹明B在目前的情况下）。吖啶橙罗丹明B的荧光的氩离子激光诱导的绿色线（K = 514.5 nm）和它...

全部展开

2.2。这两种颜色的激光诱导fluorescenceapplied测量细丝特磨综合调查的单componentdroplets温度测量可以发现在[ 13,14 ]。它一直延伸一第三检测带的maqua等人描述。[ 12 ]，二进制滴下。该技术需要播种的燃料的温度敏感fluorescentdye低浓度（罗丹明B在目前的情况下）。吖啶橙罗丹明B的荧光的氩离子激光诱导的绿色线（K = 514.5 nm）和它的强度在三separatespectral带检测。这样的温度测量的一个重要特征是荧光的比率intensitiesof这些频带是独立的检测量尺寸，对温度和成分的液滴局部激光强度和示踪剂的浓度不仅取决于。此外，参考测量要求的强度比推断的液滴的温度。这指的是在环境温度下进行（即热空气发生器关闭），在液体的圆柱形射流beforeits崩解成小液滴。在这些条件下，温度可安全地假定对应于温度对喷射器的热电偶和哲的液体乙醇体积分数为喷油器中的相同的方式。两个激光束聚焦到LDA测量体积，也就是该荧光测量探针的荧光信号量。检测到的achromaticdoublet连接到一个光纤直角。激光（K = 514.5 nm）来自液滴通过陷波滤波器消除检测的荧光发射。荧光信号中分在三个光谱带由一组beamsplittersand干扰滤波器（图2）。该检测是通过三个光电倍增管。最后，进行了信号处理的多通道采集板和一个频率为5兆赫。温度测量的\2 C.然而只有1.3的乙醇体积分数的表征是不准确的，估计约4%的精度。在这个阶段，应该说的dropletsizes进化是没有测量，但初始直径的确定在喷嘴出口处的燃油流量Q通过测量。这粒直径D0然后推断：D0¼ð6q = 1 = 3 pF的Þð1ÞF表示频率的压电陶瓷。

收起