@inproceedings{oai:jaxa.repo.nii.ac.jp:00037228,
 author = {関下, 信正 and 蒔田, 秀治 and Sekishita, Nobumasa and Makita, Hideharu},
 book = {航空宇宙技術研究所特別資料, Special Publication of National Aerospace Laboratory},
 month = {Jan},
 note = {30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd), 30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd), R(sub λ)が360から650および平均速度勾配が2.7から11.9/秒の大規模一様せん断乱流場の乱流スペクトルの準平衡領域について実験した。せん断乱流におけるエネルギーを含む渦と最大局所等方渦とのスケール比l(sub O)/l(sub G)は約4.6で、準等方乱流での2.9よりはるかに大きい。このことにより、速度勾配によって誘起される強異方性の影響下で局所等方性を得るためには、l(sub O)からl(sub G)への長いカスケード過程を必要とすることがわかった。l(sub G)からl(sub i)までとして定義した慣性小領域の存在条件下では、R(sub λ)の最小は約100であった。ただし、L(sub i)は最小非粘性渦である。Kolmogorov定数は約0.55であった。準等方乱流と一様せん断乱流の両方に対して慣性小領域はR(sub λ)(exp 1.5)に比例する。, Experiments were conducted on the quasi equilibrium range of turbulence spectra for large scale turbulent flow fields with uniform shear, R(sub lambda) of 360 to 650 and average velocity gradient of 2.7 to 11.9/s. The scale ratio between the energy containing and the largest locally isotropic eddies: l(sub O)/l(sub G) of approximately 4.6 for the sheared turbulence was far larger than 2.9 for the quasi isotropic turbulence. This fact shows that longer cascade process from l(sub O) to l(sub G) is required to attain the local isotropy under the effect of strong anisotropy induced by the velocity gradient. The minimum R(sub lambda) for the existence of inertial subrange defined as l(sub G) to l(sub i) was about 100, where l(sub i) was the minimum nonviscous eddy. Then, the Kolmogorov constant was about 0.55. The inertial subrange was substantially proportional to R(sub lambda)(exp 1.5) for both of the quasi-isotropic and uniformly sheared turbulence., 資料番号: AA0001655005, レポート番号: NAL SP-40},
 pages = {17--20},
 publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)},
 title = {普遍平衡理論に基づいた大規模一様せん断乱流場の解析},
 volume = {40},
 year = {1999}
}