Sonic and supersonic nozzle testing

该Engage赠款旨在解决Hatch与新型浓缩燃烧器喷枪开发相关的独特且具有挑战性的设计问题。目前，先进的仿真工具，如计算流体力学（CFD）被广泛用于设计各种技术；然而，在设计某些组件时，仍然需要进行实验，并咨询外部专家。本文提出了一种特殊设计的超音速喷嘴，以在浓缩燃烧器喷枪的分散空气中实现高动量比。该项目将重点关注当前Hatch喷嘴设计的特性，并提出建议，以帮助Hatch完成浓缩燃烧器喷枪的超音速喷嘴设计。为此，将对一系列喷嘴设计进行流场的粒子图像测速测量。这将评估喷嘴的性能，并量化在喷嘴的小收敛/发散通道中发现的薄边界层的影响。

This Engage grant is designed to address a unique and challenging design issue for Hatch related to the development of a new concentrate burner lance. Presently, advanced simulation tools, such as computational fluid dynamics (CFD) are widely employed to design various technologies; however, there is still a need for experimentation, and consultation with outside experts when designing certain components. The present proposal focuses on specially design supersonic nozzles to achieve high momentum ratios within the dispersion air of a concentrate burner lance. The project will focus on the characterization of current Hatch nozzle designs, and develop recommendations that will help Hatch complete the design of supersonic nozzles for the concentrate burner lance. For this purpose, particle image velocimetry measurements of the flow field will be performed for a range of nozzle design. This will assess the performance of the nozzles and quantify the effect of the thin boundary layers found in the small converging/diverging channels of the nozzles.