Abstract ▼ AI-Helper

Computational fluid dynamics provides efficient way to model and estimate functional property of jet pump devices. Empirical classic model has been widely used, but the reliability of the model is restricted by the range of reference data used to build the parameter in the model. In this study, we s...

Computational fluid dynamics provides efficient way to model and estimate functional property of jet pump devices. Empirical classic model has been widely used, but the reliability of the model is restricted by the range of reference data used to build the parameter in the model. In this study, we set a model eductor design and compare estimated dimension predicted from both Silvester model and CFD calculations. The former model underestimated the required motive flow by 330 m3/h in this specific model study. Using CFD meshing technique, we built three dimensional model for eductor and varied the nozzle diameter. Pressure and velocity profiles are presented in plane-cut gradient map. We also tested the effect of inducing Lnoz which is completely missing in classic empirical model, and found that inlet pressure can be further optimized by about 3.7%. We observe that while empirical Silvester model provides convenient way to estimate working set of parameter for eductor design, there still remains a few point to be improved by sophisticated CFD calculation, particularly we demonstrated the importance of nozzle diameter along with Lnoz parameter in eductor design.

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