Experimental study on the effect of canyon cross wind yaw angle on airflow and flame characteristics in a tunnel

Jiao, Ao; Shen, Yongjiang; Wang, Zhengyang; Chen, Tao; Tao, Haowen; Xu, Zhisheng; Fan, Chuangang

doi:10.1016/j.jweia.2021.104616

Cited by 17 publications

(1 citation statement)

References 40 publications

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“…An in-depth understanding of complex turbulent flows is essential for greatly improving simulation accuracy, especially for numerical simulations including the large eddy simulation (LES) and the unsteady Reynolds-averaged Navier-Stokes (URANS). Significant effort has been devoted in recent years to gaining a better understanding of flow characteristics in complex terrains with wind tunnel testing [2][3][4][5][6]. Furthermore, numerical simulation can be compared to validate results [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Topography Truncation on Experimental Simulation of Flow over Complex Terrain

et al. 2022

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Wind tunnel tests are a commonly used method for studying wind characteristics of complex terrain; but truncation of the terrain model is usually unavoidable and affects the accuracy of the test results. For this reason, the effects of truncated and original terrain models on the simulation of wind characteristics for complex terrain were investigated by considering both nontruncated and truncated models, with the truncated model considering the applicability of two types of transition sections. The results show that the effect of topographic truncation on profiles of mean velocity and turbulence intensity is different for regions and that inclination angle profiles are extremely sensitive to the changing topographic features upwind. In those cases, the spectra of streamwise velocity were overestimated in the low-frequency range but underestimated in the high-frequency range due to topographic truncation. At the same time, the less negative value of the slope of the spectra was found at the inertial subrange. Furthermore, the normalized bandwidth was also influenced by topographic truncation, which was narrowed in windward and leeward regions and broadened in the valley region. We should note that the performance of the transition sections used in this study was quite limited and even resulted in inaccuracies in the simulation.

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