"Exploratory Research on Supersonic Abrasive Ice-Blasting"

该SGER项目将研究在超音速喷气式飞机的减压区产生冰的可行性，然后进行超音速喷冰磨损，以清除各种工业结构中的油漆和腐蚀。这种方法将取代具有重大环境和经济缺陷的喷砂磨损。必须证明在所需位置产生用于研磨目的的适当大小的冰晶的能力。各种磨粒在磨损后立即变成残留物，被几乎任何地方都可以获得的水所取代。对超音速射流携带的小颗粒周围的流动和换热的简化分析模型表明，将形成水滴。拟议的实验将验证模型假设，识别其他相关现象，并最终测试该方法的可行性。这项探索性研究与无害环境的制造(例如，核电设施或涂层磨坊的喷砂)和民用基础设施的维护(例如，清洗桥梁、大型结构和设备上的含铅油漆，以及有毒的喷砂储存)有关。

This SGER project will examine the feasibility of generating ice in the decompression region of a supersonic jet, followed by a supersonic ice-blasting abrasion for the removal of paint and corrosion from a broad variety of industrial structures. This approach will replace sand blasting abrasion, which has significant environmental and economic drawbacks. The ability to generate at the desired location ice crystals of appropriate size for abrasive purposes has to be demonstrated. Various abrasive particles, that become residue immediately after abrasion, are replaced by water that is available at almost any location. A simplified analytical model for flow and heat transfer around small particles entrained by a supersonic jet indicates that water droplets will be formed. The proposed experiments will test the model assumptions, identify other related phenomena, and finally test the feasibility of the approach. This exploratory research is relevant to environmentally benign manufacturing (e.g. abrasive blasting of nuclear power facilities or coated mills) and to maintaining the civil infrastructure (e.g. cleaning of the lead-based paints from bridges, large structures and equipment, as well as toxic sandblasting storage).