The implementation of high-pressure oxy-fired systems presents unique challenges to burner and combustor design. For the same throughput as an atmospheric or low-pressure system, high-pressure reactors have a much smaller footprint, and consequently the injectors, mixers, and combustion chambers are reduced in size. Adequate burner performance, heat dissipation, and solids handling are therefore challenging, especially at the pilot scale. CanmetENERGY−Ottawa has developed an 80-barg pilot test facility for the development of a range of applications, including high-pressure gasification and combustion. As part of this endeavor, an optically accessible cold-flow rig was designed and built to replicate the geometry of the pilot-scale combustor. This article presents the layout of this 80-barg optically accessible vessel and results of a test program that examined sprays produced by three effervescent atomizers. Techniques applied to the near-injector region of the spray included laser sheet imaging (LSI), particle image velocimetry (PIV), and phase Doppler anemome-try (PDA). The effect of spray configuration, water flow, nozzle diameter, and ambient pressure were studied. Cone angle, successfully measured with LSI, varied between ≈ 4° and 16°. Both PIV and PDA successfully provided velocity measurements throughout the flow field. Relationships between droplet velocity and location were recorded. Droplet size at a fixed measurement plane was affected most by the velocity of the bulk mixture at the orifice exit. Results of this study provide insight into the robustness of the injectors and the potential effect of deviations from target operating conditions on burner performance for the pilot-scale system. The results provide necessary input data for computational fluid dynamics models of the system in both cold and hot cases.

中文翻译：

---

80瓶冷流测试设备中的起泡喷雾测量

高压氧燃烧系统的实施对燃烧器和燃烧器的设计提出了独特的挑战。对于与大气压或低压系统相同的产量，高压反应堆的占地面积小得多，因此喷油器，混合器和燃烧室的尺寸减小。因此，充分的燃烧器性能，散热和固体处理非常困难，特别是在中试规模上。CanmetENERGY-Ottawa开发了80巴的中试测试设备，可用于开发各种应用，包括高压气化和燃烧。作为这项工作的一部分，设计并制造了可光学访问的冷流装置，以复制中试规模燃烧室的几何形状。本文介绍了这种80巴的光学容器的布局以及测试程序的结果，该程序检查了由三个泡腾雾化器产生的喷雾。应用于喷雾器近喷射区域的技术包括激光片成像（LSI），粒子图像测速（PIV）和相位多普勒风速计（PDA）。研究了喷雾配置，水流量，喷嘴直径和环境压力的影响。通过LSI成功测量的锥角在≈4°和16°之间变化。PIV和PDA都成功地提供了整个流场的速度测量。记录液滴速度与位置之间的关系。固定测量平面上的液滴尺寸受孔出口处的大块混合物速度的影响最大。这项研究的结果可洞察喷油器的坚固性以及偏离目标操作条件对中试规模燃烧器性能的潜在影响。结果为冷热情况下系统的计算流体动力学模型提供了必要的输入数据。