螺旋桨单通道模型参数化设计方法与验证

Parameterized design method and verification of propeller single-passage domain

为了实现对螺旋桨敞水性能的准确模拟并得到可靠的水动力载荷,根据桨叶型值参数建立螺旋桨三维模型;通过设置参数变量推导出单通道流域周期界面轮廓线的空间坐标公式,实现了单通道计算流城的参数化精确造型,提高了流体计算域模型的生成效率。在此基础上,运用计算流体动力学(CFD)理论,结合雷诺时均纳维斯托克斯(RANS)方程和SST k-ω湍流模型对所建立的438X系列螺旋桨进行了敞水性能数值计算。计算得到的螺旋桨的推力系数和转矩系数与试验数据吻合较好,计算误差均控制在8%以内,验证了单通道流域造型方法的正确性以及采用该单通道流域造型对水动力性能预报的准确性,同时也证明了该方法所建立的单通道流域模型能适用于不同叶型螺旋桨的数值计算。

In order to simulate the open-water performance of propellers accurately and get reliable hy- drodynamic loads, a 3D model of propellers was established according to the curved-surface offsets of blades. The space coordinate formula of periodic interface baseline in the propeller single passage do- main was deduced. Thus, the propeller single passage domain was built accurately with parameterized va-riables and the efficiency of the fluid computational domain modeling was improved. The computa- tional fluid dynamics （CFD） method was used to simulate numerically the 438X family propellersr open-water performance, in combination with the Reynolds-averaged navier-stokes （RANS） equation and shear stress transport（SST） κ-ω turbulence model. The predicted thrust coefficients and torque coefficients agreed well with the experimental data with the calculated errors less than 8 percent. Studies show that the method of propeller single passage domain modeling is correct, that the propel- ler single passage domain modeling is useful in the accurate prediction of propeller open-water per- formance, and that the method can be applied to different kinds of numerical simulation of propellers.