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Flow field characteristics analysis of Venturi ejector improved by swirler using CFD simulation
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DOI：10.1016/j.cjche.2026.01.024.png)
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Abstract
En 中文
The ejector, a key component of the jet loop reactor for efficient gas–liquid mass transfer, has its structural design and optimization as the core of process intensification. In this work, based on the self-designed down-jet Venturi ejector, water–air is used as the working medium, and a swirler structure is added to the nozzle. Combined with the computational fluid dynamics (CFD) method, the changes of the internal flow field of the ejector in the presence of the swirler are analyzed in depth. The effects of liquid circulation rate (QL), nozzle size, and swirler angle on the performance of the ejector are investigated. The results show that under the operating conditions of 0.55 m3·h–1, the combination of a 3 mm nozzle and 30° swirler can significantly improve the ejector's suction volume (QG) and gas–liquid interface area density (IAD). QG reaches 3.22 m3·h–1, and IAD is 5246.8 m2·m–3. This study reveals the internal hydrodynamic mechanism of the swirler to enhance the performance of the ejector. It provides theoretical guidance for the design and operation optimization of high-performance swirl ejectors.
Keywords:
Venturi ejector
swirler structure
gas–liquid mass transfer
computational fluid dynamics
flow field characteristics
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