Non-smooth surface fluid friction resistance testing device and testing method

非光滑表面流体摩擦阻力测试装置及测试方法

Abstract

本发明的目的在于提供非光滑表面流体摩擦阻力测试装置及测试方法,包括水池、浮力材、支架、定滑轮、砝码、拉线,待测平板与浮力材固定在一起,水池里充有流体,待测平板和浮力材共同浮在流体上,支架固定在水池旁,定滑轮安装在支架上,拉线绕过定滑轮,且拉线的一端连接浮力材、另一端连接砝码,拉线在定滑轮与浮力材之间保持水平且高于水池的壁面,即浮力材所受到的拉力与砝码的重力相等,砝码的重力大于平板的摩擦阻力,即面平板在砝码的重力作用下可向前运动。本发明测试原理简单、直观,不同于其它评估非光滑表面减阻效果的装置,可以直接给出非光滑表面的摩擦阻力,测试结果可靠。
The invention aims to provide a non-smooth surface fluid friction resistance testing device and a testing method. The testing device comprises a pool, a buoyancy material, a support, a fixed pulley, a weight and a pull rope. A flat plate to be tested and the buoyancy material are fixed together, the pool is filled with fluid, and the flat plate to be tested and the buoyancy material jointly float on the fluid. The support is fixed to the position beside the pool, the fixed pulley is installed on the support, the pull rope is wound around the fixed pulley, one end of the pull rope is connected with the buoyancy material, and the other end of the pull rope is connected with the weight. The pull rope keeps horizontal between the fixed pulley and the buoyancy material and is higher than the wall surfaces of the pool, namely the tension exerted on the buoyancy material is equal to the gravity of the weight, the gravity of the weight is larger than the friction resistance of the flat plate, and thus the flat plate can move forward under the effect of gravity of the weight. The testing principle is simple and visualized, the testing device is different from other devices used for estimating a resistance reduction effect of a non-smooth surface, the friction resistance of the non-smooth surface can be directly tested, and the testing result is reliable.

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Cited By (1)

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    CN-106184662-ADecember 07, 2016中国船舶重工集团公司第七〇九研究所, 中国船舶重工集团公司第七一九研究所一种水池内低噪声高速上浮声学试验装置