空气动力学学报2024，Vol.42Issue(6)：44-55,12.DOI:10.7638/kqdlxxb-2023.0122
矩形射流口几何构型对合成双射流工作特性影响分析
Analysis of the influence of rectangular jet orifice geometry on the working characteristics of Dual Synthetic Jet
摘要
Abstract
Even though the dual synthetic jet,a novel active flow control method with simple configuration and rapid response,does not suffer from the diaphragm failure problem common for regular synthetic jets,its performance is prone to be affected by the geometry of the jet orifice.This paper systematically studies the performance of 25 groups of dual synthetic jet actuators with different rectangular jet orifices using Particle Image Velocimetry(PIV)and numerical simulations.Specifically,the relationship between flow structures and the frequency characteristics at the jet orifice is obtained by PIV.The effects of the jet orifice's geometry on the Helmholtz resonance frequency of the actuator cavity are analyzed,yielding the optimal RAR-RDLR relationship.Numerical simulations are used to explore the influence of the jet orifice's geometry on the jet velocity distribution and shaft-switching phenomenon.The results show that rectangular jet orifices with small aspect ratios produce more concentrated jet velocity with higher peak magnitude.In contrast,the velocity magnitude at rectangular jet orifices with large aspect ratios is lower;a single jet can be deflected easily by the pressure difference,but the energy exchange with the ambient fluid is more remarkable.关键词
射流口构型/合成双射流/流动特性/PIV/数值模拟Key words
jet orifice geometry/dual synthetic jet/flow characteristic/PIV/numerical simulation分类
力学引用本文复制引用
刘源园,彭文强,罗振兵,刘瑞,龚建宇,赵志杰,郑穆..矩形射流口几何构型对合成双射流工作特性影响分析[J].空气动力学学报,2024,42(6):44-55,12.基金项目
国家自然科学基金(52075538,U2141252) （52075538,U2141252）
湖南省自然科学基金(2023JJ30622) （2023JJ30622）
