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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Computational Analysis of Diffuser Performance for Subsonic Aerodynamic Research Laboratory Wind Tunnel
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Computational Analysis of Diffuser Performance for Subsonic Aerodynamic Research Laboratory Wind Tunnel

机译：亚音速空气动力学研究实验室风洞扩压器性能的计算分析

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AbstractImproving the efficiency of the Air Force Subsonic Aerodynamic Research Laboratory (SARL) wind tunnel with the use of alternative diffuser geometries is investigated. A previous analysis of head losses throughout the tunnel has shown that approximately thirty percent of losses through the tunnel occurred at the exit of the tunnel (Britcher, 2011). In the present work, two separate diffuser geometries, identified after precursory calculations made using SolidWorks, were computationally evaluated using the ANSYS FLUENT CFD code to determine their efficiency improvement with respect to the original tunnel geometry and with respect to each other. Computations were made on the full scale model of the fan duct and the diffuser sections with an average inlet velocity of sixty meters per second, using both uniform and fully developed velocity profiles at the entrance of the fan duct since the velocity profile in the SARL tunnel is not known. The results indicate that a 3.5° half-apex angle conical diffuse...
机译：摘要研究了使用替代扩散器几何形状来提高空军亚音速空气动力学研究实验室（SARL）风洞的效率。先前对整个隧道水头损失的分析表明，穿过隧道的水头损失中约有30％发生在隧道出口处（Britcher，2011年）。在本工作中，使用ANSYS FLUENT CFD代码对在使用SolidWorks进行先验计算后确定的两个单独的扩散器几何形状进行了计算评估，以确定它们相对于原始隧道几何形状以及彼此之间的效率提高。由于SARL隧道中的速度分布，在通风管入口处使用均匀且完全展开的速度分布图，以平均入口速度为每秒60米的通风管和扩散器段的全尺寸模型进行计算。未知。结果表明，3.5°半顶角圆锥形扩散...

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