The Relationship Between Frictional Resistance and Roughness for Surfaces Smoothed By Sanding  

Oleh:

Schultz, Michael P.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 124 no. 2 (2002), page 492-499.
Topik: relationships; relationship; frictional resistance; roughness; surface smoothed; sanding

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

An experimental investigation has been carried out to document and relate the frictional resistance and roughness texture of painted surfaces smoothed by sanding. Hydrodynamic tests were carried out in a towing tank using a flat plate test fixture towed at a Reynolds number (ReL) range of 2.8 × 10(6) – 5.5 × 10(6) based on the plate length and freestream velocity. Results indicate an increase in frictional resistance coefficient (CF) of up to 7.3 % for an unsanded, as -sprayed paint surface compared to a sanded, polished surface. Significant increases in CF were also noted on surfaces sanded with sandpaper as fine as 600 - grit as compared to the polished surface. The results show that, for the present surfaces, the centerline average height (R(a)) is sufficient to explain a large majority of the variance in the roughness function (AU(+)) in this Reynolds number range.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali