EFFICIENCY OF STEADY MOTION AND ITS IMPROVEMENT WITH THE USE OF UNSEPARATED AND SUPERCAVITATING FLOW PATTERNS
EFFICIENCY OF STEADY MOTION AND ITS IMPROVEMENT WITH THE USE OF UNSEPARATED AND SUPERCAVITATING FLOW PATTERNS
复制标题
稳态运动的效率及其通过使用非分离和超空泡流动模式的改进
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
I. Nesteruk
中科院分区：
文献类型：
--
作者：
I. Nesteruk
背景。使用不同的阻力系数、阻力重量比和功率重量比来估计车辆和动物在空气和水中稳定亚音速运动的效率。客观的。通过使用特殊形状的船体和机翼轮廓来消除边界层分离，并使用超空泡流模式在水中高速运动，这些特性得到了改善。方法。使用细长非分离旋转体和翼型上的流动以及稳定超空泡流动模式的已知结果进行分析和数值估计。结果。获得了运动效率、层流到湍流转变的临界雷诺数等的简单解析公式，并应用于不同的陆地、水生和空中交通工具、动物和人类体育活动。在相当大的雷诺数范围 6 8 10 Re 10 中，V ≤ 使用不分离的形状
Background. The efficiency of the steady subsonic motion of vehicles and animals in air and water is estimated with the use of different drag coefficients, the drag-to-weight and power-to-weight ratios. Objective. The improvement of these characteristics with the use of special shaped hulls and wing profiles which remove boundary layer separation and with the use of the supercavitating flow pattern for the high-speed motion in water. Methods. Analytical and numerical estimations with the use of known results for flow on slender unseparated body of revolution and airfoil and for the steady supercavitating flow pattern. Results. Simple analytic formulae were obtained for the movement efficiency, the critical Reynolds numbers of the laminar-to-turbulent transition etc. and applied for different terrestrial, aquatic and airborne vehicles, animals and human sport activity. In a rather large range of the Reynolds number 6 8 10 Re 10 , V the use of unseparated shapes