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

Name: Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles
Author: Bal, M., Kayansalçik, Gökhan, Ertunç, Özgür, Böke, Y. E.

İsim	Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles
Yazar	Bal, M., Kayansalçik, Gökhan, Ertunç, Özgür, Böke, Y. E.
Basım Tarihi:	2021-08-31
Basım Yeri	- Europe, Institute for Liquid Atomization and Spray Systems, ILASS
Konu	CFD, Pressure-swirl, Simplex, VOF
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	2-s2.0-85180738461
Kayıt Numarası	074c42e4-aa11-45e1-96eb-483cee467d33
Lokasyon	Mechanical Engineering
Tarih	2021-08-31
Notlar	TÜBİTAK
Örnek Metin	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.

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

Yazar Bal, M., Kayansalçik, Gökhan, Ertunç, Özgür, Böke, Y. E.

Basım Tarihi 2021-08-31

Basım Yeri - Europe, Institute for Liquid Atomization and Spray Systems, ILASS

Konu CFD, Pressure-swirl, Simplex, VOF

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 2-s2.0-85180738461

Kayıt Numarası 074c42e4-aa11-45e1-96eb-483cee467d33

Lokasyon Mechanical Engineering

Tarih 2021-08-31

Notlar TÜBİTAK

Örnek Metin 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.