端板对叶梢负载桨空化性能影响数值分析

Effects of End Plate on Cavitation Performance of Contracted and Loaded Tip Propeller

关键词:  叶梢负载桨  端板  空化  螺旋桨  变参数分析

Key words:  Contracted and loaded tip propeller  End plate  Cavitation  Propeller  Variable parameter analysis

摘要:

为了探究端板对尾流收缩叶梢负载（CLT）桨空化性能的影响，基于Star-ccm+软件对CLT（Contracted and loaded tip）桨P1727的端板变参数模型进行了空化计算，计算采用DDES湍流模型和Schnerr-Sauer 空化模型，通过对E779A标准模型桨进行计算，验证了该方法的有效性。研究表明：桨叶表面空化区域与低压区域基本一致，空化区域的范围与推力损失程度呈正相关变化趋势；在端板有效抑制梢部绕流的情况下，端板长度和宽度对CLT桨的敞水性能和空化特性影响微弱；端板倾角对敞水性能和空化特性影响较大，倾角越大，推力和扭矩越大，空化发生时推力衰减程度越大。

Abstract:

In order to explore the effects of the end plate on the cavitation performance of the contracted and loaded tip （CLT） propeller， the cavitation characteristics of the end plate variable parameter model of the CLT propeller P1727 based on the commercial fluid software Star-ccm+ were calculated. Using the DDES turbulence model and the Schnerr-Sauer cavitation model， the effectiveness of the method is verified by the cavitation calculation of standard model propeller E779A. Studies have shown that the cavitation area on the blade surface is basically the same as the low pressure area， and the range of the cavitation area is positively correlated with the degree of thrust loss. When the end plate effectively suppresses the flow around the tip， the length and width of the end plate make little difference on the open water performance and cavitation characteristics of CLT propeller. The end plate inclination has a greater impact on the open water performance and cavitation characteristics. The greater the inclination angle， the greater the thrust and torque， and the greater the thrust attenuation when cavitation occurs. The research results can provide a reference for the design of the end plate of the CLT propeller.