Numerical study on transient phenomena of an adjustable transcritical CO2 ejector

Hailong Liu; Fang Liu

doi:10.1117/12.2638610

20 September 2022 Numerical study on transient phenomena of an adjustable transcritical CO₂ ejector

Hailong Liu, Fang Liu

Proceedings Volume 12261, International Conference on Mechanical Design and Simulation (MDS 2022); 122614M (2022) https://doi.org/10.1117/12.2638610
Event: Second International Conference on Mechanical Design and Simulation (MDS 2022), 2022, Wuhan, China

Abstract

In the present work, the transient phenomena of a transcritical CO2 ejector are numerically investigated. The validity of the numerical model is verified by experimental data, and the relative errors of active mass flow rate and suction mass flow rate are 4.2% and 8.9%, respectively. The results show that the pressure distribution curve has the same trend at different times, and there will be obvious pressure fluctuations in the premixing chamber and the mixing chamber, and the pressure fluctuations cause the entrainment performance of the ejector to fluctuate. The response time of the fixed ejector under changing conditions is 0.13s, and the response time of the adjustable ejector with needle position is -2mm is 0.2s, and the response time is increased by 53.85%.

Citation Download Citation

Hailong Liu and Fang Liu "Numerical study on transient phenomena of an adjustable transcritical CO₂ ejector", Proc. SPIE 12261, International Conference on Mechanical Design and Simulation (MDS 2022), 122614M (20 September 2022); https://doi.org/10.1117/12.2638610

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