Numerical studies on surface pressure fluctuations of the DARPA Suboff model
The surface pressure fluctuations on the DARPA Suboff model is simulated and analyzed with the help of the CFD software in this paper. The frequency and amplitude distribution of the pressure fluctuations calculated on the surface of the model shows that the fluctuations signals generate
in regions with cross section changes, such as the front, middle and tail sections. It is shown that the pulsations occur mainly in the low frequency region within 400Hz, and the strongest fluctuations signal appear in the surrounding area of the command platform. The frequency spectrum of
pressure fluctuations contains signals generated by vortices of various scales, which are mainly caused by turbulence and protruding structures on the model surface. At the same time, the influences of flow speed and scale effect upon pressure fluctuations are also investigated.
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Document Type: Research Article
Affiliations: Harbin Engineering University
Publication date: 12 October 2020
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