大尺度回转体模型边界层壁面脉动压力测量及相似性分析  

Measurement and similarity analysis of boundary layer wall pressure fluctuation in large-scale revolution body models

作　　者：高岩[1,2] 沈琪 俞孟萨[1,2] 刘进 吴波[1,2] GAO Yan;SHEN Qi;YU Mengsa;LIU Jin;WU Bo(China Ship Scientific Research Center,Wuxi 214082;Taihu Laboratory of Deepsea Technological Science,Wuxi 214082)

机构地区：[1]中国船舶科学研究中心,无锡214082 [2]深海技术科学太湖实验室,无锡214082

出　　处：《声学学报》2025年第2期299-307,共9页Acta Acustica

摘　　要：采用嵌入式齐平安装的柔性壁面脉动压力传感器阵列,在声学风洞中测量了两种大尺度回转体模型的边界层转捩区频率–空间谱及其谱峰特征和湍流区壁面脉动压力并分析其相似性,得到以雷诺数为频率分段点的转捩区和湍流区壁面脉动压力拟合模型,模型具有一定的适用性。结果表明,回转体艏部转捩区局部雷诺数为5.27×10^(5)~1.1×10^(6),转捩状态由起始到完全发展在转捩特征谱频段的脉动压力带级增加36 dB,特征谱峰无量纲中心频率为0.2基本不变;湍流区壁面脉动压力无量纲频谱在0.1~10范围,符合Smol’yakov模型随无量纲频率的变化规律;相同模型和不同尺度回转体模型湍流区壁面脉动压力无量纲频谱,分别在0.4~4和0.1~10范围,存在3~4 dB和4 dB的尺度效应,且模型尺度大,无量纲谱高。The measurements for transition frequency-space spectrum and its spectral peak characteristics,turbulent wall pressure fluctuation and its similarity are conducted in acoustic wind tunnel through embedded flush-mounted flexible sensor arrays,regarding two large-scale revolution body models.The numerical fitting model of wall pressure fluctuation in the transition and turbulent regions can be established,in which Reynolds number can serve as frequency segmentation point,and the model is characterized by universality to some extent.It is showed that the local Reynolds number in the transition region at the bow of revolution body is 5.27×10^(5)~1.1×10^(6),and the wall pressure fluctuation within the frequency range of transition characteristic spectrum increases by 36 dB from the initial to the fully developed transition stage.Besides,non-dimensional center frequency of transition characteristic spectrum is essentially unchanged at 0.2.The non-dimensional fluctuation pressure spectrum in the turbulent region is in the range of 0.1 to 10,which is in accordance with that of Smol’yakov model.In addition,the non-dimensional spectrum of turbulent fluctuation pressure has scale effects of 3–4 dB in the ranges of 0.4 to 4 for the same model,while it has scale effects of 4 dB in the ranges of 0.1 to 10 for different scale models,in which the non-dimensional spectrum increases by enlargement of the model.

关 键 词：回转体 壁面脉动压力 转捩 湍流 

分 类 号：U666.7[交通运输工程—船舶及航道工程] U674.941[交通运输工程—船舶与海洋工程]