CAJ | 학술논문

制冷系统用单向阀在特定工作条件下常常会出现工作不稳定的情况，这对单向阀的动力学特性研究提出了要求。为了研究这一问题，本文采用 CFD 模拟获得了不同工作压力、工作流量以及不同阀芯开度条件下阀芯受到的流体作用力。基于系统内流体与阀芯的相互耦合作用建立了单向阀系统的动力学模型。利用该模型对不同工作条件下单向阀的动力学特性进行了模拟仿真，实验结果证实了模型的准确性。该模型可以用于预测单向阀动力特性。
제랭계통용단향벌재특정공작조건하상상회출현공작불은정적정황，저대단향벌적동역학특성연구제출료요구。위료연구저일문제，본문채용 CFD 모의획득료불동공작압력、공작류량이급불동벌심개도조건하벌심수도적류체작용력。기우계통내류체여벌심적상호우합작용건립료단향벌계통적동역학모형。이용해모형대불동공작조건하단향벌적동역학특성진행료모의방진，실험결과증실료모형적준학성。해모형가이용우예측단향벌동력특성。
Check valve used in refrigeration system works unstably under certain working conditions. To avoid possibility of such occurrence, dynamic analysis must be considered. In this paper, CFD simulation was adopted to investigate the fluid force acting on valve spindle under the conditions of different working pressures, different working flow rates and different valve opening degrees. Dynamic model was developed by coupling motion of the valve spindle with fluid of the system. With this model, dynamic characteristics of the check valve were studied numerically. The model was validated by experimental results, and the validation result shows that, this model can be used to predict dynamic characteristics of the check valve.