Replacement Laser for the Optical Engineering Research Group (Equipment for Multiple Projects Proposal)

最先进的脉冲激光器对于支持光学工程研究小组（OERG）在流体力学中的诊断工作至关重要，特别是我们近年来成功开发的全息粒子图像测速（HPIV）的使用。HPIV允许测量三维速度矢量场图，并用于表征复杂的流场。我们目前的激光系统是1992年从EPSRC拨款购买的，编号：GR/G55426，标题为“使用颗粒图像测速法进行全场I.C.发动机气缸流量测量”，现已过时。值得注意的是，新的激光器将在更多的应用中找到用途，而不是我们在本提案中可以合理描述的。在我们描述的三个应用中，研究将允许我们：1。更好地了解颗粒物料（如粉末）的流动，从而防止泵送系统和筒仓堵塞；2 .设计更高效、更环保的柴油机燃烧系统；设计呼吸药物吸入器，以更有效地将精心控制的药物剂量输送到肺部。

A state of the art pulsed laser is vital to underpin the Optical Engineering Research Group (OERG) diagnostics work in fluid mechanics and specifically our use of Holographic Partide Image Velocimetry (HPIV) which we have successfully developed in recent years. HPIV allows for mesurement of three dimensional velocity vector field maps and is used to characterise complex flow fields. Our current laser system was purchased in 1992 from an EPSRC grant, ref: GR/G55426 entitled Full-Field I.C. Engine Cylinder Flow Measurement using Partide Image Velocimetry and is now obsolete. It is important to note that the new laser will find use in more applications than we can reasonably describe in this proposal. In the three applications we have described the research will allow us to:1. better understand the flow of granular materials e.g. powders and thus prevent blockage in pumping systems and silos;2. design diesel engine combustion systems to be more efficient and environmentally friendly;3. design respiratory drug inhalers to deliver a carefully controlled drug dosage to the lungs with more efficiency.