可压缩气体合成喷射流数值模拟  

Numerical Simulation of Compressible Gas Synthetic Jet

作　　者：王竹萍[1] 仲顺安[1] 丁英涛[1] 马永旺[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2011年第3期363-366,共4页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60843005);北京理工大学基础研究基金资助项目(20070142018)

摘　　要：为了更深入地研究合成喷射流性能与激励器结构参数的关系,在考虑气体可压缩性质的条件下,对合成喷射流进行了理论分析,得出了合成喷射流性能与激励器结构参数的函数关系式,并采用动边界条件模拟实际压电膜的振动,对合成喷外部射流场和激励器腔体内部射流场进行了联合数值模拟.计算结果与已有的实验结果及理论分析结果吻合较好,验证了该数值模拟方法的可行性.Synthetic jet flow is created by the compression effect in actuator＇s cavity caused by vibration of piezoelectric diaphragm,whose mechanism is similar to a micro compressor.To get the relationship between the performance of synthetic jet flow and the actuator parameters,the compressibility of gas has been considered and the correlation function reflecting that relationship was obtained by theoretical analysis.The vibration of piezoelectric diaphragm was simulated using moving boundary condition and numerical simulation was implemented under compressible gas model with moving boundary.It is shown that the simulation results are comparable to the results of experiment and theoretical analysis.

关 键 词：可压缩气体 合成喷射流 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]