contributor author | Tran, The Hung | |
contributor author | Chen, Lin | |
date accessioned | 2022-02-04T22:00:41Z | |
date available | 2022-02-04T22:00:41Z | |
date copyright | 8/28/2020 12:00:00 AM | |
date issued | 2020 | |
identifier issn | 0098-2202 | |
identifier other | gtp_142_09_091012.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4274703 | |
description abstract | In this study, ability of an optical-flow algorithm in extracting wake structure of axisymmetric model was investigated. The initial data for optical-flow processing were obtained in low-speed conditions by particle image velocimetry method. The Reynolds number based on the model diameter was around ReD = 1.97 × 104 in this study. Both the time-averaged and transient flow characteristics of near-wake flow were illustrated and examined by the optical-flow analysis method proposed. The processing results of optical-flow method showed good agreement with conventional cross-correlation methods. The ability of optical-flow method to extract flow fields was, thereby, confirmed for blunt-based flow at low-speed conditions. This study showed that the antisymmetric flow behavior of the near wake is the dominant type at low-speed conditions. Differing to traditional methods and cross-correlation results, the optical-flow results showed a frequency at around StD = 0.015 of the near wake for the first time, which is connected to vortex shedding behavior of the wake flow. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Optical-Flow Algorithm for Near-Wake Analysis of Axisymmetric Blunt-Based Body at Low-Speed Conditions | |
type | Journal Paper | |
journal volume | 142 | |
journal issue | 11 | |
journal title | Journal of Fluids Engineering | |
identifier doi | 10.1115/1.4048145 | |
journal fristpage | 0111503-1 | |
journal lastpage | 0111503-17 | |
page | 17 | |
tree | Journal of Fluids Engineering:;2020:;volume( 142 ):;issue: 011 | |
contenttype | Fulltext | |