The verification and experiment research on optical flow

摘要: The quantitative measurement of flow velocity field possesses fundamental and key importance for understanding complex phenomenon physical nature in the research aerodynamics, at same time, demand also stimulates development aerodynamic test technology level. Traditional methods mostly adopt single point or invasive techniques, cannot meet needs situation global measurement. optical technique advantages high space resolution smoothness, could acquire vector by pixel scale from particle image. differential method is basic solution Based on constraint equation combined with smoothness condition spatial temporal gradients grayscale, movement information each would be extracted field. In paper, calculation was introduced program programmed. Through artificial displacement image, verified analyzed to obtain a reasonable range optimal weighted value which guide how gain precision practical application. A verification experiment carried out small wind tunnel, tracer as carrier, calculated out. objective this paper develop full based flow, improve avoid gradient effect. these studies, it expected that can contribute dynamics structure acquiring more information.