Investigation of Density Effect on Turbulent Round Jet in Wave Environment (I)

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基本資料

Project title

Code/計畫編號

NSC99-2628-E006-163

Translated Name/計畫中文名

紊流射流於波浪場下與密度之效應研究( I )

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Co-Investigator(s)/共同執行人

蕭士俊(計畫主持人)

Department/Unit

Department of Hydraulic and Ocean Engineering,NCKU

Website

https://www.grb.gov.tw/search/planDetail?id=2149718

Year

2010

Start date/計畫起

01-08-2010

Expected Completion/計畫迄

31-07-2011

Co-Investigator(s)

Tai-Wen Hsu

Bugetid/研究經費

936千元

ResearchField/研究領域

土木水利工程

本計畫擬於三年計畫中利用模型試驗與數值模式求解紊流射流於波浪場作用下其物理特性與行為，進而探討射流流體與周遭流體隨著不同密度的變化交互作用後之物理現象變化。試驗擬在二維波浪斷面水槽進行，利用質點影像測速儀 (Particle Image Velocimetry, PIV) 量測不同波浪條件通過射流排放口附近之流場分佈與紊流特性變化，並進一步探討波浪通過不同密度條件之紊流射流其流場變化與行為。根據試驗結果，本研究擬擴充 Wu and Liu 之大尺度渦流法 (Large Eddy Simulation, LES) 三維紊流數值模式為基礎，有系統並循序地實驗所量測的數據發展出適合模擬射流與波浪交互作用後之數值模式，並且於計畫中所發展的數種量測方法以提供與數值模擬之結果進行校驗。本研究計畫包含數值模式發展與實驗之驗證。相信其成果將對波浪與紊流射流互制物理現象有更進一步的瞭解，此外相關的研究成果亦有助於作為實務工程上之應用與參考。 The objectives of this proposed research are mainly aimed at the effects of density on round jet in wave environment coupled the state of the art experimental measurements and sophisticated numerical analysis. The detailed flow fields and turbulent fluctuations of the jet with various incident wave conditions will be measured by PIV technique in this research. The fundamentals of this research are based on three-dimensional large eddy simulation (LES) model named Truchas is employed. This model is originally developed by the research team at Los Alamos National Laboratory and later improved by Wu and Liu at Cornell University and has been proved to be a reliable tool in computing a various of physical problems. Specifically, a series of systematic experiments using the stat-of-art PIV measurements technique will be performed, with the view of examining the details of flow fields and providing the data for numerical validation. Furthermore, a new set of model equations allowing us to better simulate the interaction of a turbulent jet with waves will be derived and coded. Therefore, through this three-year systematic proposed research, it is expected that the understanding and prediction of the turbulent jet-wave interaction process can be achieved and may further provide the guideline of practical applications.

Keyword(s)

波浪
紊流射流
質點影像測速儀
PIV
turbulent jet

DSpace CRIS

Investigation of Density Effect on Turbulent Round Jet in Wave Environment (I)

基本資料

Description