Анализ волновых полей свободной поверхности воды от движущейся пластины, пары последовательно расположенных стоек и обсуждение возможных составляющих их волнового сопротивления

Abstract

The paper presents and compares photographs of wave patterns from a moving plate with pointed and full ends, from which, with the exception of a cylindrical insert, there develops a post with a teardrop-shaped cross-section, as in a pair of tandem posts. The plate length equals to the overall size of the specified pair of consecutive posts. The conclusion is made about the possibility of selecting a unified wave resistance component from the total resistance, which can be determined experimentally based on the results of the study of a combination of individual posts and/or other objects of the specified shape. Possible variants of wave resistance components are being discussed. Besides, a variant of modeling the ship's wave resistance by representing two pairs of such wave systems rather than two Kelvin wave systems on a free surface is proposed. Additional fore and aft Kelvin wave systems are proposed to be shifted against the course of motion by half the wavelength. These additional wave systems are intended to describe internal intermediate waves located between the main transverse waves. There have been presented the expressions for wave resistance that contain some proportionality coefficients, possible components of wave resistance from smoothing diverging waves within the smoothing zone of wave structures, starting from the bow extremity and other unaccounted components of wave resistance. The photos proposed were taken in the experimental pool of Siberian State University of Water Transport (Novosibirsk State Academy of Water Transport) in 2006