V.V.Nikishov Statistical characteristics of light wave propagating in turbulent sea water |
Applied hydromechanics, Vol. 5 (77) ¹ 1, (2003) |
| Propagation of two-dimensional light wave in local homogeneous and isotropical turbulent water, when fluctuations of optical refractive index is determined by fluctuations of temperature and salinity, is studied. The method of smooth perturbations is used for estimations of statistical characteristics of wave. At first, the fundamentals of this method is briefly stated. The estimations and approximated expressions of statistical characteristics of wave propagating in atmosphere are found. The characteristics of wave propagating in turbulent water when fluctuations of refractive index are determined fluctuations of single scalar component are considered too. Model of spectrum of fluctuations of optical refractive index is developed earlier [25]. It is based on the model Corrsin-Pao. The presence of two scalar components results in anomalous behavior of spectrum of fluctuations of refractive index in small-scale region, in paticular the arising of local extremums depending on the contributions of fluctuations of scalar components in fluctuations of refractive index. It is shown that these anomlouses are manifested in behavior of such statistical characteristics as correlation functions of amplitude fluctuations and structure function of phase and others. This leads to the changing of the width of correlation function, displacement of local extremums of stucture function of phase and so on. |
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| TEXT LANGUAGE: Russian |