【摘要】 为了探讨割划水面支柱在较高 Fr 数下的喷溅特性,开展了小厚度比抛物线型支柱的系列试验。试验中的8个模型共组成12个支柱试验方案,试验 Fr 数约在1.7～3.0之间。试验中,测量了支柱的总阻力。通过分析处理这些数据,获得了喷溅阻力及其湿面积的一些基本特征。进而,又选取了合适的无因次量表达形式,并利用多元多项式回归分析和曲线拟合技术,获得了在实用范围内,抛物线型支柱喷溅阻力系数及其湿面积系数的回归结果。它们均可简单地表为一个几何参数——支柱半进水角的正切 t/x,和一个运动参数——Fr 的函数。文中最后给出的算例表明,计算与试验结果吻合。更多还原

【Abstract】 Spray drag and wetted surface area were measured with a series ofeight surface-piercing struts constitutitng twelve configurations operated atFroude numbers between 1.7 and 3.Struts are all of parabolic sections.By processing the experimental data,the performance of spray dragand wetted surface area have been found out.Based on the regressionanalysis of multivariable polynomial and curve fitting technique,theregressional coefficients of spray drag and wetted surface area havebeen obtained in the practical range and can be simply expressed inpolynomial form of a geometrical parameter—the tangent of halfentry angle(t/x)and a motion parameter—Froude number(Fr).Theexample given in the paper indicates that the prediction of the strutspray drag agrees with the experimental data.更多还原