同济大学学报（自然科学版）2026，Vol.54Issue(8)：1200-1209,10.DOI:10.11908/j.issn.0253-374x.25168
尾端扰流板厚度对圆柱杆件流场与气动噪声影响
Influence of Thickness of an Attached Splitter Plate on the Flow and Aerodynamic Noise Produced by a Circular Cylinder
摘要
Abstract
The flow behavior and flow-induced noise around a circular cylinder attached to splitter plates of different thicknesses(relative to the cylinder diameter)are investigated and compared with those of a bare circular cylinder at a Reynolds number of 6×104,using spectral proper orthogonal decomposition and acoustic analogy theory.It is found that the attached splitter plate weakens the formation of flow separation and suppresses large-scale alternating vortex shedding in the wake of cylinder-like bars.The wake begins to undulate after the vortices are transported a certain distance in the streamwise direction after which the fluctuation decreases.When the thickness of the splitter plate increases from 5 mm to 10 mm,the wake fluctuation range and vortex shedding intensity are further reduced.Moreover,the suppression of aerodynamic force fluctuations and drag reduction are enhanced.Therefore,aerodynamic noise can be effectively reduced for a circular cylinder by appropriately increasing the thickness of its attached splitter plate.关键词
圆柱/扰流板/谱本征正交分解/流场特性/气动噪声Key words
circular cylinder/splitter plate/spectral proper orthogonal decomposition/flow behaviour/aerodynamic noise分类
数理科学引用本文复制引用
朱剑月,杨桓,程冠达,方存与,徐俊起..尾端扰流板厚度对圆柱杆件流场与气动噪声影响[J].同济大学学报（自然科学版）,2026,54(8):1200-1209,10.基金项目
国家自然科学基金(52232013,51875411) （52232013,51875411）
上海市地面交通工具空气动力与热环境模拟重点实验室项目(23DZ2229029) （23DZ2229029）
