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    Progress and challenges in large eddy simulation of gas turbine flows.

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    Authors
    Yang, Zhiyin cc
    Affiliation
    University of Derby
    Issue Date
    2018
    
    Metadata
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    Other Titles
    燃气轮机流动大涡模拟的进展与挑战(英文)
    Abstract
    Gas turbine flows are complex and very difficult to be predicted accurately not only due to that they are inherently unsteady but also because the presence of many complex flow phenomena such as transition, separation, substantial secondary flow, combustion and so on. Those complex flow phenomena cannot be captured accurately by the traditional Reynolds-Averaged Navier-Stokes (RANS) and Unsteady RANS (URANS) methods although they have been the main numerical tools for computing gas turbine flows in the past decades due to their computational efficiency and reasonable accuracy. Therefore, the desire for greater accuracy has led to the development and application of high fidelity numerical simulation tools for gas turbine flows. Two such tools available are Direct Numerical Simulation (DNS) which captures directly all details of turbulent flow in space and time, and Large Eddy Simulation (LES) which computes large scale motions of turbulent flow directly in space and time while the small scale motions are modelled. DNS is computationally very expensive and even with the available most powerful supercomputers today or in the foreseeable future it is still prohibitive to apply DNS for gas turbine flows. LES is the most promising simulation tool which has already reasonably widely used for gas turbine flows. This paper will very briefly review first the applications of LES in turbomachinery flows and then focus on two gas turbine combustor related flow cases, summarizing the current status of LES applications in gas turbines and pointing out the challenges that we are facing.
    Citation
    Yang, Z. (2018) 'Progress and challenges in large eddy simulation of gas turbine flows.', Chinese Journal of Turbomachinery (风机技术), Issue 2. pp.11-24
    Publisher
    Shenyang Blower Research Institute ( 沈阳鼓风机研究所)
    Journal
    Chinese Journal of Turbomachinery (风机技术)
    URI
    http://hdl.handle.net/10545/622960
    Additional Links
    http://oversea.cnki.net/kcms/detail/detail.aspx?filename=FENG201802002&DBName=cjfqtotal&dbcode=cjfq
    http://oversea.cnki.net/kns55/oldNavi/n_CNKIPub.aspx?naviid=110&YearID=FENG201802&BaseID=FENG&Field=%E6%8B%BC%E9%9F%B3%E5%88%8A%E5%90%8D*%E5%B9%B4*%E6%9C%9F&Value=FENG*2018*02&NaviLink=%E9%A3%8E%E6%9C%BA%E6%8A%80%E6%9C%AF-%2fKns55%2foldnavi%2fn_item.aspx%3fNaviID%3d100%26BaseID%3dFENG
    Type
    Article
    Language
    en
    ISSN
    10068155
    Collections
    Department of Mechanical Engineering & the Built Environment

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