{"title":"涡轮机械长期尺度解析模拟中协同处理过程周期收敛分析的数学公式","authors":"J. M. F. Oro","doi":"10.1504/PCFD.2021.10036934","DOIUrl":null,"url":null,"abstract":": Scale-resolving simulations, like LES modelling, are recent CFD techniques to analyse numerically unsteady flows and turbulence in turbomachinery. Despite their high computational costs, they provide an unsteady, time-resolved solution of the flow with embedded turbulent scales that requires an additional statistical description. This paper provides the mathematical formulation required to compute and assure its periodic convergence, updating the phase-averaged values and the residual on the run, so the amount of data to be stored is extremely reduced. The formulation, applied over a numerical database of a wall-modelled LES simulation of the rotor-stator interaction in a low-speed axial fan using a 3D linear cascade model, reveals that primary flow variables converge faster than turbulent structures due to inherent instabilities of the coherent flow vortices. This work forms part of the concept of co-processing, where some post-processing routines are resolved during the iterative process of CFD simulations to save computational costs. University of Oviedo with the thesis dissertation entitled ‘Unsteady rotor-stator interaction in a low-speed axial flow fan’ (2005). His current research activities are mainly focused on: 1) the analysis and description of turbulence and unsteady flows in turbomachinery; 2) the development and application of measurement and visualisation techniques in experimental fluid mechanics; 3) CFD modelling and numerical simulation of fluid machinery.","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":"1 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mathematical formulation for the analysis of the periodic convergence during co-processing routines in long-run, scale-resolving simulations of turbomachinery\",\"authors\":\"J. M. F. Oro\",\"doi\":\"10.1504/PCFD.2021.10036934\",\"DOIUrl\":null,\"url\":null,\"abstract\":\": Scale-resolving simulations, like LES modelling, are recent CFD techniques to analyse numerically unsteady flows and turbulence in turbomachinery. Despite their high computational costs, they provide an unsteady, time-resolved solution of the flow with embedded turbulent scales that requires an additional statistical description. This paper provides the mathematical formulation required to compute and assure its periodic convergence, updating the phase-averaged values and the residual on the run, so the amount of data to be stored is extremely reduced. The formulation, applied over a numerical database of a wall-modelled LES simulation of the rotor-stator interaction in a low-speed axial fan using a 3D linear cascade model, reveals that primary flow variables converge faster than turbulent structures due to inherent instabilities of the coherent flow vortices. This work forms part of the concept of co-processing, where some post-processing routines are resolved during the iterative process of CFD simulations to save computational costs. University of Oviedo with the thesis dissertation entitled ‘Unsteady rotor-stator interaction in a low-speed axial flow fan’ (2005). His current research activities are mainly focused on: 1) the analysis and description of turbulence and unsteady flows in turbomachinery; 2) the development and application of measurement and visualisation techniques in experimental fluid mechanics; 3) CFD modelling and numerical simulation of fluid machinery.\",\"PeriodicalId\":54552,\"journal\":{\"name\":\"Progress in Computational Fluid Dynamics\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2021-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Progress in Computational Fluid Dynamics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1504/PCFD.2021.10036934\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Computational Fluid Dynamics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1504/PCFD.2021.10036934","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}
Mathematical formulation for the analysis of the periodic convergence during co-processing routines in long-run, scale-resolving simulations of turbomachinery
: Scale-resolving simulations, like LES modelling, are recent CFD techniques to analyse numerically unsteady flows and turbulence in turbomachinery. Despite their high computational costs, they provide an unsteady, time-resolved solution of the flow with embedded turbulent scales that requires an additional statistical description. This paper provides the mathematical formulation required to compute and assure its periodic convergence, updating the phase-averaged values and the residual on the run, so the amount of data to be stored is extremely reduced. The formulation, applied over a numerical database of a wall-modelled LES simulation of the rotor-stator interaction in a low-speed axial fan using a 3D linear cascade model, reveals that primary flow variables converge faster than turbulent structures due to inherent instabilities of the coherent flow vortices. This work forms part of the concept of co-processing, where some post-processing routines are resolved during the iterative process of CFD simulations to save computational costs. University of Oviedo with the thesis dissertation entitled ‘Unsteady rotor-stator interaction in a low-speed axial flow fan’ (2005). His current research activities are mainly focused on: 1) the analysis and description of turbulence and unsteady flows in turbomachinery; 2) the development and application of measurement and visualisation techniques in experimental fluid mechanics; 3) CFD modelling and numerical simulation of fluid machinery.
期刊介绍:
CFD is now considered an indispensable analysis/design tool in an ever-increasing range of industrial applications. Practical flow problems are often so complex that a high level of ingenuity is required. Thus, besides the development work in CFD, innovative CFD applications are also encouraged. PCFD''s ultimate goal is to provide a common platform for model/software developers and users by balanced international/interdisciplinary contributions, disseminating information relating to development/refinement of mathematical and numerical models, software tools and their innovative applications in CFD.
Topics covered include:
-Turbulence-
Two-phase flows-
Heat transfer-
Chemical reactions and combustion-
Acoustics-
Unsteady flows-
Free-surfaces-
Fluid-solid interaction-
Navier-Stokes solution techniques for incompressible and compressible flows-
Discretisation methods and schemes-
Convergence acceleration procedures-
Grid generation and adaptation techniques-
Mesh-free methods-
Distributed computing-
Other relevant topics