Effect of Geometry on Small Scale Venturi Nozzle Performance

Volume 10: Fluids Engineering Pub Date : 2021-11-01 DOI:10.1115/imece2021-68560

Hannah O’Hern, Xiang Zhang, Bahman Abbasi

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Abstract

A parametric study was conducted on small scale, subsonic Venturi nozzles. The purpose of this study was to determine the effect of different operating conditions and different geometric parameters on the performance of the nozzle. In this study, the performance of the nozzle was defined as the ratio of suction mass flow to motive mass flow, or the suction ratio. The parametric study included 15 different nozzle geometries, under various operating conditions, for a total of 55 case studies. The parametric study was conducted using CFD in Ansys Fluent. Additionally, experimental validation was conducted for several 3D printed nozzles. Dimensional analysis of the parameters was completed to determine the form of a dimensionless correlation for the suction ratio as a function of the other parameters. The case studies were run through a constrained multi-variable global optimization code to determine the dependency on each dimensionless group. This correlation can be used as a design guide for Venturi nozzles. If operating conditions dictate an optimum suction ratio, the ideal nozzle geometry can be determined. Alternatively, based on the geometry of a given nozzle, the resulting suction ratio can be determined.

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几何形状对小型文丘里喷嘴性能的影响

对小型亚音速文丘里喷管进行了参数化研究。本研究的目的是确定不同的操作条件和不同的几何参数对喷嘴性能的影响。在本研究中，喷管的性能定义为吸入质量流量与动力质量流量的比值，即吸入比。参数化研究包括15种不同的喷嘴几何形状，在不同的操作条件下，总共55个案例研究。在Ansys Fluent中使用CFD进行参数化研究。此外，还对几种3D打印喷嘴进行了实验验证。完成了参数的量纲分析，以确定吸力比作为其他参数的函数的无量纲相关性的形式。案例研究通过约束多变量全局优化代码运行，以确定对每个无量纲组的依赖关系。这种相关性可以作为文丘里喷嘴的设计指南。如果操作条件规定了最佳吸力比，则可以确定理想的喷嘴几何形状。或者，根据给定喷嘴的几何形状，可以确定所得到的吸力比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Volume 10: Fluids Engineering

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