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| Numerical simulations and experimental investigations of flow separation control in diffuser of transonic wind tunnel |
| Received:March 14, 2011 Revised:September 22, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20124016 |
| KeyWord:transonic wind tunnel wide angle diffuser numerical simulation flow separation flow control |
| Author | Institution |
| 丛成华 |
中国空气动力研究与发展中心 空气动力学国家重点实验室, 绵阳 ;中国空气动力研究与发展中心 设备设计及测试技术研究所, 绵阳 |
| 廖达雄 |
中国空气动力研究与发展中心 空气动力学国家重点实验室, 绵阳 ;中国空气动力研究与发展中心 设备设计及测试技术研究所, 绵阳 |
| 彭强 |
中国空气动力研究与发展中心 空气动力学国家重点实验室, 绵阳 ;中国空气动力研究与发展中心 设备设计及测试技术研究所, 绵阳 |
| 李红喆 |
中国空气动力研究与发展中心 设备设计及测试技术研究所, 绵阳 |
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| Abstract: |
| A numerical simulation and experimental study was conducted to investigate a approach for controlling separation in wide angle diffuser (WAD) of transonic wind tunnel.WAD plays a vital role in the improvement of flow field quality in wind tunnel test section.Because of multitudinous parameters influencing performance of WAD,it is very difficult that design is only completed by experimental method.Basing on numerical simulations and experiments,the details were performed for different parameters influencing velocity uniformity of WAD outflow.It presented the control equations and boundary conditions for numerical simulation.Then the vortex wake length after conical taper were given using different inlet conditions,conical taper angle and bottom radius.Outlet velocity profiles and flow field details were shown in diffuser using different angle with different conical taper angle and open-area ratio of perforated plates.A transonic wind tunnel was used for the experiments.The numerical and experimental results were in accord with conclusions that reasonable parameters of WAD could significantly reduce or eliminate separation to produce more uniform velocity profiles entering setting chamber.It states the importance and feasibility of CFD in aerodynamical design of wind tunnel section. |
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