NICOP - Effects of superhydrophobic surfaces on Turbulent Boundary Layer induced vibration and drag
Abstract
The main objective of the proposed NICOP project is to perform a number of experimentaltests on superhydrophobic (SH) materials, fo""cused on resistance and vibration measurements, toassess their ability to modify not only the hydrodynamic drag, but also the vibra"tional response ofstructures excited by turbulent boundary layers for naval applications. Wall pressure fluctuationmeasurements wi"ll also be performed, trying to derive models for pressure spectra to be related tostructural response changes.The tests will incl""ude both SH materials produced by CNR (of two different kinds) andmaterials made available from the ONR, from other ONR projects. I""n the experimental test,fundamental parameters will be varied to collect accurate information on the effects of (i) material(subst""rate) roughness, (ii) flow velocity and, (iii) for specific SH material (SLIPS), lubricant oilviscosity, on the material performanc""es.The approach will include also an analysis of the properties of the CNR materials in terms timedurability, and the role of the"" physical state of the working interface, depending on the coatingadopted. Specific feedback actions on coatings and materials desi""gn, in order to improve the SHbehavior and the related performances will also tried during the project.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 06, 2017
- Source ID
- N629091812003
Entities
People
- Elena Ciappi
Organizations
- Office of Naval Research
- United States Navy