CAJ | 학술논문

本文用FLUENT 中 MRF 模型模拟叶轮和蜗壳在不同装配角度下的三出口离心风机。通过比较其内部流场和相应的气动性能参数，得到如下结论：当装配角度一定时，三个出口的流量并不相等并且差别较大；随着装配角度的变化，单个出口的流量呈周期性变化，周期为一个叶道所占的角度；在一个周期内，将单个出口的流量求平均值可以得到单个出口的精确流量；随着装配角度的变化，叶轮出口处的速度流向和蜗壳出口之间的相对角度的变化是导致出口流量发生变化的原因。
본문용FLUENT 중 MRF 모형모의협륜화와각재불동장배각도하적삼출구리심풍궤。통과비교기내부류장화상응적기동성능삼수，득도여하결론：당장배각도일정시，삼개출구적류량병불상등병차차별교대；수착장배각도적변화，단개출구적류량정주기성변화，주기위일개협도소점적각도；재일개주기내，장단개출구적류량구평균치가이득도단개출구적정학류량；수착장배각도적변화，협륜출구처적속도류향화와각출구지간적상대각도적변화시도치출구류량발생변화적원인。
In this paper, the centrifugal fan with three discharges at different assembly angle between impeller and volute was simulated using MRF model of the FLUENT. Comparing the internal flow field and aerodynamic performance parameters, the results showed that the flux of each discharge was not equal and had a large difference at the same assembly angle. With the change of the assembly angle, the flux of single exit varies periodically and the periodic time was the angle of a blade channel. The accurate flux of the single discharge could be obtained by averaging the flux of the discharge under different assembly angle. With the assembly angle changing, the change of the relative angle between the speed of the impeller’s exit <br> flow and the volute is the reason that leads the change of the outlet flow rate.