各種形状をもつ乱流促進法の効果ならびにその固有抵抗について

抄録

Formerly, the critical value of roughness for plate studs having constant breadth was found by experiments.
The author, lately, carried out experiments to determine critical values of roughness for various shaped stimulators and observed the wake behind stimulators by means of the chemical film method, hot wire anemometer technique and milk injection. Critical values of roughness for various stimulators were determined by results obtained.
Moreover, resistance of various stimulators own were measured directly.
Using above-mentioned results, resistance of various stimulators placed on the flat plate were calculated and compared each other under various conditions. The superiority of studs was confirmed by these results.