Department of Chemistry, Texas A&M University, 3012 TAMU, College Station, Texas 77842, USA.
Opt Lett. 2011 Jan 15;36(2):196-8. doi: 10.1364/OL.36.000196.
We present an initial demonstration of simultaneous velocity and temperature mapping in gaseous flow fields using a new nitric oxide planar laser-induced fluorescence-based method. The vibrationally excited NO monitoring (VENOM) technique is an extension of two-component velocimetry using vibrationally excited NO generated from the photodissociation of seeded NO(2) [Appl. Opt. 48, 4414 (2009)], where the two sequential fluorescence images are obtained probing two different rotational states to provide both velocity and temperature maps. Comparisons to computational fluid dynamics simulations show that the initial VENOM measurements provide good velocity and temperature maps in the relatively high-density regions of the flow, where the rms uncertainties are approximately 5% for velocity and 9% for temperature.
我们展示了一种新的基于一氧化氮平面激光诱导荧光的方法，用于在气态流场中同时进行速度和温度测绘的初步演示。振动激发的 NO 监测 (VENOM) 技术是使用从 seeded NO(2) 的光解产生的振动激发的 NO 进行两分量速度测量的扩展[Appl. Opt. 48, 4414 (2009)]，其中两个连续荧光图像通过探测两个不同的旋转状态来获得，以提供速度和温度图。与计算流体动力学模拟的比较表明，初始 VENOM 测量在流场的相对高密度区域提供了良好的速度和温度图，其中速度的均方根不确定性约为 5%，温度的均方根不确定性约为 9%。
