Experiments were done at the Davidson Laboratory, Stevens Institute of Technology in New Jersey. We used hot-film anemometer (TSI Model 1210-60W) to measure water velocity fluctuation generated by a diver. To provide proper tool to calculate turbulent kinetic energy s2U in the diver's wake, we extended Novikov's turbulent spectral theory to the large scale of motion which is much greater than the viscous energy dissipating scales and developed theoretical derivation of the energy spectral curve. This curve fitted very well to the data measured by numerous researchers. We estimated turbulent energy dissipation rate epsilon using Kolmogrov's quasi-equilibrium theory and calculated turbulent kinetic energy s2U using the universal curve. For the results, we have found that the curve was in good agreement with the measured turbulent energy spectra of the diver's wake. The turbulent kinetic energy s2U (m2/s2) and energy dissipation rate epsilon (m 2/s3) of diver's wake were in the range of 1.62 x 10-5 ≤ s2U ≤ 37.05 x 10-5, 1.2 x 10 -6 ≤ epsilon ≤ 67.7 x 10-6 , respectively and these values were well above the ambient levels. The characteristic length lambda (m) of diver's wake was in the range of 0.08 ≤ lambda ≤ 0.98 ∼ 1.98. s2U was inversely proportional to the diver's distance L d, and epsilon was proportional to Ld-2.
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机译：实验是在新泽西州史蒂文斯理工学院戴维森实验室进行的。我们使用热膜风速计（TSI型号1210-60W）来测量潜水员产生的水速波动。为了提供合适的工具来计算潜水员尾流中的湍动能s2U，我们将Novikov的湍流谱理论扩展到了比粘性耗能尺度大得多的大运动尺度，并开发了能量谱曲线的理论推导。该曲线与许多研究人员测得的数据非常吻合。我们使用Kolmogrov的准平衡理论估算了湍流能量耗散率epsilon，并使用通用曲线计算了湍流动能s2U。对于结果，我们发现该曲线与潜水员尾流测得的湍流能谱非常吻合。潜水员尾流的湍动能s2U（m2 / s2）和耗能率epsilon（m 2 / s3）在1.62 x 10-5≤s2U≤37.05 x 10-5，1.2 x 10 -6≤epsilon的范围内分别≤67.7 x 10-6，并且这些值远高于环境水平。潜水员尾流的特征长度λ（m）在0.08≤lambda≤0.98〜1.98的范围内。 s2U与潜水员的距离L d成反比，ε与Ld-2成正比。
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