ストラハル数に関する実験

概要

論文の詳細を見る
The frequency n of eddies generated behind a circular cylinder in fluid is expressed by the equation n=S (v/d), where v is the fluid velocity, d the diameter of circular cylinder and S Strouhal's number, which has been dealt with the function of Reynold's number. Many investigators have experimented on the values of Strouhal's number between R_e≒3×10〜5×10^5,but the values between R_e≒2×10^4〜1×10^5 have not been obtained. The present authors have experimented on all of them between R_e≒6×10〜5×10^5 by three devices with high speed tunnel, low speed tunnel and water rotating vessel respectively and have made it clear that they take nearly a value of 0.18 between Re=1×10^4〜1×10^5 and suddenly increase 0.3〜0.6 at the point near the critical Reynold's number R_<ec>≒5×10^5.
一般社団法人日本機械学会の論文
1960-08-25