PARTICLE IMAGE VELOCIMETRY - ESTIMATION OF MEASUREMENT CONFIDENCE AT LOW SEEDING DENSITIES

被引：18

作者：

COUPLAND, JM

PICKERING, CJD

机构：

[1] Univ of Southampton, United Kingdom

来源：

OPTICS AND LASERS IN ENGINEERING | 1988年 / 9卷 / 3-4期

关键词：

Fluid Mechanics - Mechanical Variables Measurement--Flow - Optical Variables Measurement--Flow - Photography; High Speed - Velocimeters--Laser Applications;

D O I：

10.1016/S0143-8166(98)90003-3

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In order to optimize the spatial resolution of particle image velocimetry, it is often necessary to take measurements from regions of the photographic record which contain few particle images. If Young's fringe analysis is used in these cases, the observed fringe pattern is confused by extraneous spatial frequency components or speckle noise. If spatial correlation analysis is employed, spurious correlation peaks occur. In this paper we introduce a definition of signal to noise ratio appropriate to particle image velocimetry and investigate the statistical variation of this ratio as a function of the seeding particle size and concentration.

引用

页码：201 / 210

页数：10

共 10 条

[1] MULTI-POINT OPTICAL MEASUREMENTS OF SIMULTANEOUS VECTORS IN UNSTEADY FLOW - A REVIEW. [J].