Computational and Experimental Evaluation of a Complex Inlet Swirl Pattern Generation System (POSTPRINT)
Turbomachinery Branch, Turbine Engine Division Wright-Patterson Air Force Base United States
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An assessment was conducted to determine the suitability of subscale, low-Mach-number, particle image velocimetry PIV testing and computational fluid dynamics CFD analysis to evaluate swirling flow downstream of a swirl pattern generation system composed of continuous patterns of turning vanes. Successful demonstration of the evaluation methods required acceptable comparison of the PIV and CFD to an independent five-hole probe measurement performed at the design Mach number and full-scale geometry. The focus of the investigation was on direct comparison of flow angles and flow features one diameter downstream of the swirl pattern generator. Both the subscale PIV and the CFD provide adequate representation of the swirling flow produced by the full-scale generator. The subscale PIV and CFD may be used to predict the performance of the full-scale swirl pattern generator and allow for inexpensive testing and analysis to be performed during the design process, thus improving the accuracy of generating a desired swirl pattern.