Tracking characteristics of tracer particles for PIV measurements in supersonic flows

被引：23

作者：

Fang, Chen ^{[1
]}

Hong, Liu ^{[1
]}

Yang Zifeng ^{[2
]}

Hui, Hu ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China

[2] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA

[3] Iowa State Univ, Dept Aerosp Engn, Ames, IA 50011 USA

来源：

CHINESE JOURNAL OF AERONAUTICS | 2017年 / 30卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Particle Image Velocimetry (PIV); Seeding; Supersonic flow; Tracers; Tracking characteristics; PLANAR VELOCITY-MEASUREMENTS; IMAGE VELOCIMETRY; WAKE; DRAG;

D O I：

10.1016/j.cja.2016.12.033

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The tracking characteristics of tracer particles for particle image velocimetry (PIV) measurements in supersonic flows were investigated. The experimental tests were conducted at Mach number 4 in Multi-Mach Wind Tunnel (MMWT) of Shanghai Jiao Tong University. The motion of tracer particles carried by the supersonic flow across shockwaves was theoretically modelled, and then their aerodynamic characteristics with compressibility and rarefaction effects were evaluated. According to the proposed selection criterion of tracer particles, the PIV measured results clearly identified that the shockwave amplitude is in good agreement with theory and Schlieren visualizations. For the tracer particles in nanoscales, their effective aerodynamic sizes in the diagnostic zone can be faithfully estimated to characterize the tracking capability and dispersity performance based on their relaxation motion across oblique shockwaves. On the other hand, the seeding system enabled the tracer particles well-controlled and repeatable dispersity against the storage and humidity. (C) 2017 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.

引用

页码：577 / 585

页数：9

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