摘要
从紊流理论出发,对处于紊流流场中的示踪粒子进行受力分析,根据粒子图像测速(PIV)中的实际要求与BBO(Basset-Boussinesq-Oseen)方程的不同,建立了紊流流场中示踪粒子的模型;推导出适应内燃机燃烧室流场PIV测试的示踪粒子跟随性计算公式,得出在该实验条件下,示踪粒子直径小于19.2μm时,PIV测试会取得较好结果.
Based on the present turbulent theory, the forces acting on the tracer particle in the turbulent field was analyzed. Based on the differences between the requirements of the particle image velocimetry (PIV) and the BBO (Basset-Boussinesq-Oseen) equation, the model of the particle in the turbulent field was built. The formula for calculating the following behaviors of the tracer particle in the flow field was deduced. It is concluded that PIV test will have a better effect when the tracer particle's diameter is under 19.2 μm in the experimental conditions.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2004年第5期662-665,共4页
Journal of Dalian University of Technology
