高レイノルズ数における円柱まわりの流れと抵抗

概要

論文の詳細を見る
Pressure distribution and vortex shedding were measured in a cryogenic wind tunnel from subcritical up to transcritical Reynolds numbers(10^5 ≦ R_e ≦ 10^7 ) and Mach numbers up to 0.3 without changing experimental arrangement. Drag coefficients were calculated using pressure distributions. Pressure distributions and drag coefficients show characteristic changes for subcritical, lower transition, critical, under transition and transcritical Reynolds number ranges respectively. Strouhal number takes constant value with an increase in Reynolds number for 10^5 ≦ R_e < 3.2 × 10^5. Narrowband vortex shedding could not be measured in the critical Reynolds number range ( 3.2 × 10^5 ≦ R_e ≦ 6.9 × 10^5). It was also measured again in the upper transition and transcritical Reynolds number ranges. Spectra of the pressure distributions and velocity fluctuations measured are presented for several characteristic values of Reynolds numbers. Results are also compared with those of the other authors.
社団法人日本機械学会の論文
1985-01-25