Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Jinfeng Dang Ye Gao |
| Copyright Year | 2015 |
| Description | Author affiliation: Harbin Eng. Univ., Nantong, China (Jinfeng Dang; Ye Gao) |
| Abstract | Shock wave/boundary layer interactions (SWBLI) is an unavoidable problem in supersonic and hypersonic flow. The inherent defects caused by Reynolds-averaged method make the RANS (Reynolds-averaged Navier-Stokes) turbulent models unable to reveal the impact of small-scale recirculation zone on shock wave. Meanwhile, the LES (Large Eddy Simulation) turbulent model is still unaffordable for engineering since a huge amount of calculation. Therefore, the DES (Detached Eddy Simulation) turbulent model is a more economical choice which is a hybrid model combing the RANS in main flow and the LES in the boundary layer. In this paper, the study of Reynolds stress on SWBLI in isolator is conducted using four different commonly used RANS turbulent models (including Standard k - ε model, RNG k - ε model, standard k - ω model and SST model). The results could be used as a guide to choosing the RANS in core flow of the DES model. It was found that, in the boundary layer, the Reynolds Stress u"u" is usually under predicted and the Reynolds Stress u"v" is over predicted. The maximum difference was more than 50%. Averaged velocity ṽ was far more over predicted, and the maximum difference was about 500%. In main flow area, the SST model and the Standard k - ε model were more accurate, and its results could basically reflect the changes of averaged velocity and Reynolds stress. Analysis suggests that Reynolds stress difference in u"v" caused its difference in averaged velocity, especially velocity ṽ in the y direction. This is because the over prediction of u"v" enlarges the recirculation zone. Comparing the four turbulent models simulation results, it was suggested that, in main flow, the SST model had enough accuracy in Reynolds averaged velocity, Reynolds stress and the shock wave intermittent resolution. It is most suitable main flow area turbulent model in the DES model. |
| Starting Page | 1 |
| Ending Page | 7 |
| File Size | 2090455 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781479953790 |
| e-ISBN | 9781479953806 |
| DOI | 10.1109/AERO.2015.7119316 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-03-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Numerical models Data models Atmospheric modeling Biological system modeling Electric shock Radio access networks Mathematical model shock wave/boundary interactions turbulent models Reynolds stress isolator |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|