Image Pre-processing Method for near-wall PIV measurements over moving curved interfaces

CORC > 北京大学 > 工学院

	Image Pre-processing Method for near-wall PIV measurements over moving curved interfaces; Image Pre-processing Method for near-wall PIV measurements over moving curved interfaces
	2016
关键词	moving curved interfaces near-wall PIV measurements image transformation adaptive stretching synthetic particles moving curved interfaces near-wall PIV measurements image transformation adaptive stretching synthetic particles
英文摘要	PIV measurements near a moving interface are always difficult. This paper presents a PIV image pre-processing method that returns high spatial resolution velocity profiles near the interface. Interface tracking and an image transformation are used to stretch the particle image strips at a curved interface into rectangles. Adaptive stretching of the image strips in the normal direction is used to improve the spatial resolution. Synthetic particles are also added into the solid region to provide a restriction for the particles from both sides of the interface. The working hypothesis is that the fluid motion near the interface being "quasi- tangential flow", which is reasonable in most fluid-structure interaction scenarios. The method was validated against the window deformation iterative multi-grid scheme(WIDIM) using synthetic image pairs with different velocity profiles. The method was tested for boundary layer measurements near a rotating blade and near a flexible flapping flag. This image pre-processing met...; PIV measurements near a moving interface are always difficult. This paper presents a PIV image pre-processing method that returns high spatial resolution velocity profiles near the interface. Interface tracking and an image transformation are used to stretch the particle image strips at a curved interface into rectangles. Adaptive stretching of the image strips in the normal direction is used to improve the spatial resolution. Synthetic particles are also added into the solid region to provide a restrictio; 西北工业大学研究生院、中国高校航空学院院长联席会; 1
会议录	2016年航空科学与技术全国博士生学术论坛
语种	英语
内容类型	会议论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/479724]
专题	工学院
推荐引用方式 GB/T 7714	. Image Pre-processing Method for near-wall PIV measurements over moving curved interfaces, Image Pre-processing Method for near-wall PIV measurements over moving curved interfaces[C]. 见:.