A 1D Model for the Unsteady Gas Dynamics of Ejectors
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2022
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| _version_ | 1866913194660855808 |
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| author | Berghe, Jan Van den Dias, Bruno R. B. Bartosiewicz, Yann Mendez, Miguel A. |
| author_facet | Berghe, Jan Van den Dias, Bruno R. B. Bartosiewicz, Yann Mendez, Miguel A. |
| contents | We propose a 1D unsteady model for supersonic single-phase ejectors. The model treats an ejector as a pipe network with two inputs and one output and combines a 1D gas dynamics formulation in each `pipe' with a junction model for entrainment and mixing. The model is calibrated and validated on experimental data in steady-state conditions and used to analyze the choking mechanism for the mixed flow. The model was then benchmarked against 2D URANS simulations to predict the ejector response to a sudden change in operating conditions, producing traveling waves. The results show that the model can correctly predict the ejector performance and the stream-wise evolution of relevant integral quantities (e.g. mass flow rates and momentum) in both steady and transient conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2208_07687 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | A 1D Model for the Unsteady Gas Dynamics of Ejectors Berghe, Jan Van den Dias, Bruno R. B. Bartosiewicz, Yann Mendez, Miguel A. Fluid Dynamics We propose a 1D unsteady model for supersonic single-phase ejectors. The model treats an ejector as a pipe network with two inputs and one output and combines a 1D gas dynamics formulation in each `pipe' with a junction model for entrainment and mixing. The model is calibrated and validated on experimental data in steady-state conditions and used to analyze the choking mechanism for the mixed flow. The model was then benchmarked against 2D URANS simulations to predict the ejector response to a sudden change in operating conditions, producing traveling waves. The results show that the model can correctly predict the ejector performance and the stream-wise evolution of relevant integral quantities (e.g. mass flow rates and momentum) in both steady and transient conditions. |
| title | A 1D Model for the Unsteady Gas Dynamics of Ejectors |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2208.07687 |