Development and Evaluation of a Simplified CFD Model for a Swirl Diffuser with the Aid of 2D Particle Image Velocimetry
Ondřej Šikula, Michal Krajčík, Pavel Zubík, Aliaksandra Mishuk, Müslüm Arici
TL;DR
This paper presents a simplified CFD model for a swirl diffuser validated using PIV measurements, aiming to reduce simulation costs while maintaining accuracy.
Contribution
The study introduces a corrected simplified model using momentum adjustments and the SST k-ω turbulence model for efficient and reliable simulations.
Findings
A simplified model with adjusted momentums improved accuracy compared to geometry-based models.
The SST k-ω turbulence model provided a good balance between accuracy and computational efficiency.
PIV measurements were effective for validating and refining simplified CFD models despite dimensional limitations.
Abstract
In numerical modeling of swirl diffusers, simplifying the diffuser geometry can substantially reduce simulation costs. This study describes the development and performance evaluation of simplified computational fluid dynamics (CFD) models of a swirl diffuser by using 2D particle image velocimetry (PIV). Two simplified models were created by replacing the diffuser with simple supply openings, where momentums were prescribed. The first model defined momentums solely based on geometric rules. In the second, it was demonstrated how the accuracy of the first, geometry-based model, can be improved by adjusting the momentums using results from a detailed CFD model. The effect of using the Reynolds stress model or the SST k-ω turbulence model on the accuracy of the CFD model and computation time was investigated. The simplified models were benchmarked against both the detailed CFD model and the…
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Taxonomy
TopicsParticle Dynamics in Fluid Flows · Combustion and flame dynamics · Fluid Dynamics and Turbulent Flows