Advanced modelling of a transcritical CO2 ejector

被引：0
作者：
Fang, Yu [1 ]
Sen, Srijit [1 ]
Poncet, Sebastien [1 ]
Bartosiewicz, Yann [2 ]
Nesreddine, Hakim [3 ]
Monney, Dominique [4 ]
机构：
[1] Univ Sherbrooke, Sherbrooke, PQ J1K 2R1, Canada
[2] Catholic Univ Louvain, B-1348 Louvain La Neuve, Belgium
[3] Hydroquebec, Lab Technol Energie, Shawinigan, PQ G9N 6T6, Canada
[4] Emerson Commercial & Residential Solut, Brantford, ON N3T 2N8, Canada
来源：
14TH IIR GUSTAV-LORENTZEN CONFERENCE ON NATURAL FLUIDS | 2020年
基金：
加拿大自然科学与工程研究理事会;
关键词：
Refrigeration; Carbon Dioxide; Ejector; Transcritical cycle; Compound choking; 2-PHASE; FLOW; SEMIDISCRETE; SIMULATIONS; EQUATION; SCHEMES; NOZZLE; STATE;
D O I：
暂无
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Two-dimensional unsteady calculations of a transcritical CO2 ejector are performed using a new and well validated density -based solver developed under the OpenFoam library. It is coupled with a tabulated equation of state to evaluate the CO2 properties. A Homogeneous Equilibrium Model and the k -epsilon closure are chosen as the two-phase and turbulence modellings. Finally, it incorporates a Navier Stokes characteristic boundary condition to guarantee the accuracy and stability of the simulations. This numerical tool has been extensively validated against experimental data for converging -diverging nozzles and supersonic ejectors. Beyond the characteristic curves of the ejector for different operating conditions, the extended compound -compressible flow theory for real refrigerants is also verified using the present simulations.
引用
收藏
页码：387 / 392
页数：6
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