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| 离心风机叶型安装角βb(r)径向分布的气动作用研究 |
| Effect of radial distribution of blade mounting angle βb(r) on the aerodynamic performance of centrifugal fan |
| 投稿时间：2019-07-01 |
| DOI：10.13259/j.cnki.eri.2022.02.006 |
| 中文关键词: βb(r)叶型 气流角 惯性力 曲率 |
| 英文关键词:βb(r) blade profile flow angle inertial force curvature |
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| 中文摘要: |
| 基于计算流体力学计算了3种叶型安装角βb(r)径向分布的离心风机流场，研究了βb(r)径向分布的变化对叶轮流道内气流角、惯性力及风机性能等参数的影响，为离心风机叶片造型阶段实现叶轮流道内流动的精细控制提供了依据。研究结果表明，βb(r)分布会显著影响叶轮流道内物理参数的变化趋势，对叶轮出口参数周向分布影响较小。进、出口参数相同时，风机外特性因βb(r)分布的不同存在明显差异。惯性力流线法向分量对叶轮出口附近吸力面边界层的发展趋势会产生影响，其大小与流线曲率有关。 |
| 英文摘要: |
| Based on the computational fluid dynamics, the flow field of the centrifugal fan with three kinds of distribution of blade mounting angle βb(r) were calculated. The influence of mounting angle βb(r) distribution of the blade on airflow angle, inertial force, and fan performance in the flow channel of the impeller was studied. It can provide a reference for precise flow control in the blades of the centrifugal fan during its blade modeling. The results showed that the distribution of βb(r) could significantly affect the physical parameters in the flow channel of the impeller, while it had minor effect on the circumferential distribution of the impeller outlet parameters. Under the same inlet and outlet conditions, the external characteristics of the fan were significantly different due to different βb(r). The normal component of the inertial force streamline could affect the development trend of the boundary layer along the suction surface near the impeller exit, and its value was related to the curvature of the streamline. |
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