The Eulerian-Eulerian model is validated by a comparison of numerical results with experimental data. The purpose of this work is to investigate the influences of the primary nozzle surface roughness on wet steam ejectors in the refrigeration cycle with steam water as a working flow. The actuator fluid and the secondary fluid then mix and compress.Machining operation and presence of water droplets cause increase the surface roughness of wet steam ejector walls and change its performance in the refrigeration cycle. The fluid velocity significantly increased so that the fluid velocity exceeds the velocity of sound within the fluid. The present model uses a convergent-divergent nozzle to drive the fluid. Steam Ejector ConclusionĪt the end of the solution process, we obtain contours of pressure, velocity, and Mach number. We have used a density-based solver due to the compressibility in this project. We perform the meshing by ANSYS Meshing software. We design the present 2-D model by the Design Modeler software. To analyze this model, we investigate parameters such as Mach number, velocity, and pressure based on the motion of the fluid flow along with the steam ejector. The Mach number corresponding to the fluid flow inside the ejector also increases. In the present model, due to the vacuum pressure difference between the two inlet fluids, the suction phenomenon for the secondary fluid has to occur.

The present simulation aims to investigate the behavior of primary and secondary fluid after passing through the internal including creating vacuum and gas suction and fluid mixing and the steam ejector diffuser.

The present problem deals with the flow of water vapor as the main fluid (primary) and the secondary fluid (suction) within a convergent-divergent steam ejector. The basis of the ejector is to create a vacuum for the suction of the desired fluid (such as powder, granule, sludge, etc.) based on the continuous conversion of kinetic and pressure energy. Ejectors have two major tasks, including creating vacuum and gas suction and fluid mixing. Eventually, the ejector mix the two primary and secondary fluids and they exit from the outlet. The steam ejector is a mechanical device that uses a primary (motive) fluid to suck up a secondary fluid (gas, liquid, or solid particles). Civil & Hydraulic Structures Engineering.

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