Digital image processing of an acoustically excited jet flow

Yei Chin Chao, M. S. Jeng, J. M. Han

研究成果: Conference contribution

摘要

Recent work to study excitation effects on an acoustically excited jet flow is reported. Emphasis is placed on integreated visualization and digital image processing of high resolution, sequential planar gas concentrations of some characteristics of the large scale vortical structures of the acoustically excited jet flow, such as multi-eddy merging, vortex braids formation, eddy evolution and entrainment processes, jet boundary expansion, etc. The digital image processing technique employed there extends our previous work (Chao, et. al. 1990) for optimal threshold filtering of the background noise and in situ calibration of camera and illumination distortions. A compact, low-cost, automatic frame acquisition and analysis system is developed for mean and r.m.s. planar gas concentrations and automatic jet boundary identification. Also, stroboscopic images are created for detailed sequential study of a quick-changing process using a low framing-rate camera by suitably controlling the acoustic excitation frequency and the jet flow.

原文English
主出版物標題Experimental and Numerical Flow Visualization
發行者Publ by ASME
頁面113-124
頁數12
ISBN(列印)0791808742
出版狀態Published - 1991
事件Winter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
持續時間: 1991 十二月 11991 十二月 6

出版系列

名字American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
128

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
城市Atlanta, GA, USA
期間91-12-0191-12-06

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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