Experimental studies on pressure drag and aerodynamic noise of cylinder with porous coatings

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Abstract
Previous numerical studies hold inconsistent viewpoints of the porous coating on a circular cylinder reducing or increasing drag, and the present experimental study aims to clarify this argument. Additionally, a common viewpoint is that the porous coatings can suppress both the near-field wall pressure fluctuations and far-field acoustic pressure, but optimal parameters of the porous materials are still unclear. In this paper, the experimental studies reveal effects of three parameters, i.e., incoming flow velocity, pores per inch, and thickness of metal foams, on the pressure drag, wall pressure fluctuations, and associated noise level.
Funding Information
  • National Natural Science Foundation of China (52076086)
  • Stake key laboratory of aerodynamics of China (SKLA-20200302)
  • Key Laboratory of Aerodynamic Noise Control of China Aerodynamics Research and Development Center (ANCL20220302)

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