Abstract
There are several well-known and widely used industrial cleaning methods in the market today. One of them is dry ice blasting. In this method, moisture-free air is compressed, mixed with solid CO2 particles, and blasted though a nozzle; in the process, the gas expands, propelling its velocity. The high-speed, two-phase flow cleans by supercooling and crushing particles on the surface, causing dry ice sublimation. As the nozzle is a crucial component of the system, the authors conducted a numerical analysis of the geometry of the proposed convergent-divergent nozzle. A mathematical model of the supersonic, two-phase flow was developed and implemented in commercial Computational Fluid Dynamics (CFD) code. Various operating parameters, such as inlet pressure and dry ice mass flow, were taken into consideration.
Highlights
There are several well-known and widely used industrial cleaning methods in the market today
Once the pellets are loaded in the two-phase dry ice blasting machine, compressed air blasts them through a nozzle on to the cleaning surface [9]
The final force impacting the cleaning surface is a sum of three components: force of compressed air, force of solid CO2 particles caused by their velocity, and sublimation force caused by sudden phase change supported by rapid velocity growth [11]
Summary
Industrial pollution is a huge challenge for plants operators. Impurities can cause a decrease in device efficiency, improper operation, or damage [1]. Once the pellets are loaded in the two-phase dry ice blasting machine, compressed air blasts them through a nozzle on to the cleaning surface [9]. The final force impacting the cleaning a mathematical model of nozzle flow via a convergent-divergent channel was built and implemented in surface is a sum of three components: force of compressed air, force of solid CO 2 particles caused by a numerical environment. The phenomena to be modeled was a supersonic two-phase flow Very few their velocity, and sublimation force caused by sudden phase change supported by rapid velocity researchers have attempted dry ice blasting nozzle optimization from a cleaning efficiency point of view. Dry ice blasting can be used for cleaning of electrical devices in the automobile, aircraft, There are papers describing the two-phase flow via a convergence-divergence nozzle.
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