【摘要】 对示踪粒子发生装置和几种粒子的特性进行了实验研究 ,发现压缩空气流中自然存在的润滑油粒子在跟随性、分布的均匀性和稳定性、以及浓度方面对于PIV测量都非常有利。实验成功地应用PIV技术对超跨声速喷流流场进行了测量 ,初步分析了测量结果与理论的差异 ,并分析了实验的可靠性和精度。更多还原

【Abstract】 Tracing particle producers and different kinds of particle are studied experimentally,and it is discovered that oil droplets naturally existing in the pressurized air are ideal for PIV measurement due to their good following capacity,uniform distribution,and proper density.Super and tran sonic jet flows are successfully measured with a PIV system,with the discrepancy between the experimental and theoretical results analyzed and the accuracy and reliability of the technique discussed.更多还原