Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles

Mustafa Bal*, Gökhan Kayansalçik, Özgür Ertunç, Yakup Erhan Böke

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Özet

Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl chamber length-to-diameter ratio of 1.33. discharge coefficient (CD) and spray angle values are compared to the experimental data. Moreover, a benchmark study is conducted between 2D and 3D methods in terms of accuracy, computational cost and flow variables such as orifice exit axial and tangential velocity. The simulations are performed using a hybrid RANS-LES approach, IDDES model. It is observed that 2D simulation has lower accuracy in the validation parameters such as discharge coefficient and spray angle as compared to the 3D simulation. The main reason for 2D simulation inaccuracy might be the tangential port inlet effects and wrong estimation of the loss of swirl inside the swirl chamber. On the other hand, 2D simulations have approximately 1000 times lower computational cost than 3D simulations.

Orijinal dilİngilizce
Yayın durumuYayınlandı - 31 Ağu 2021
Etkinlik15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021 - Edinburgh, United Kingdom
Süre: 29 Ağu 20212 Eyl 2021

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???event.eventtypes.event.conference???15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021
Ülke/BölgeUnited Kingdom
ŞehirEdinburgh
Periyot29/08/212/09/21

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Publisher Copyright:
© 2021 ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems. All Rights Reserved.

Finansman

This study was carried out in the framework of a PhD thesis. Computational resources were supplied from Istanbul Technical University through BAP project ID number 42673 and National Center for High Performance Computing (UHEM). Moreover, the authors gratefully acknowledge the Scientific and Technological Research Council of Turkey (TÜBİTAK) and TEI for providing financial support to this research with the 118C053 project. Additionally, we would like to thank Hakan Çiçek for the support he has given at the nozzle modelling process.

FinansörlerFinansör numarası
TEI118C053
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu

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