4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III最新文献_第2页

Aeroservoelasticity in Compressible Flow and Aeroelastic Scaling Considerations 可压缩流动中的气动伺服弹性和气动弹性标度考虑

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0162

E. Presente, P. Friedmann

引用次数: 2

Reduced Order Aerodynamic Modeling of How to Make CFD Useful to an Aeroelastician 如何使CFD对气动弹性学家有用的降阶气动建模

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0166

E. Dowell, K. Hall, Michael C. Romanowski

{"title":"Reduced Order Aerodynamic Modeling of How to Make CFD Useful to an Aeroelastician","authors":"E. Dowell, K. Hall, Michael C. Romanowski","doi":"10.1115/imece1997-0166","DOIUrl":"https://doi.org/10.1115/imece1997-0166","url":null,"abstract":"\u0000 In this article, we review the status of reduced order modeling of unsteady aerodynamic systems. Reduced order modeling is a conceptually novel and computationally efficient technique for computing unsteady flow about isolated airfoils, wings, and turbomachinery cascades. Starting with either a time domain or frequency domain computational fluid dynamics (CFD) analysis of unsteady aerodynamic or aeroacoustic flows, a large, sparse eigenvalue problem is solved using the Lanczos algorithm. Then, using just a few of the resulting eigenmodes, a Reduced Order Model of the unsteady flow is constructed. With this model, one can rapidly and accurately predict the unsteady aerodynamic response of the system over a wide range of reduced frequencies. Moreover, the eigenmode information provides important insights into the physics of unsteady flows. Finally, the method is particularly well suited for use in the active control of aeroelastic and aeroacoustic phenomena as well as in standard aeroelastic analysis for flutter or gust response. Numerical results presented include: 1) comparison of the reduced order model to classical unsteady incompressible aerodynamic theory, 2) reduced order calculations of compressible unsteady aerodynamics based on the full potential equation, 3) reduced order calculations of unsteady flow about an isolated airfoil based on the Euler equations, and 4) reduced order calculations of unsteady viscous flows associated with cascade stall flutter, 5) flutter analysis using the Reduced Order Model. The presentation will include our most recent results including the use of A-one Orthogonal Decomposition as an alternative or complement to eigenmodes.","PeriodicalId":166345,"journal":{"name":"4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127272403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Aeroelastic Analysis of a Trimmed Generic Hypersonic Vehicle 整流型高超声速飞行器气动弹性分析

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-11-16 DOI: 10.2514/6.1998-1807

I. Nydick, P. Friedmann

引用次数: 12

Systems Analysis of Launch Vehicle Aeroelastic Coupling 运载火箭气动弹性耦合系统分析

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0155

K. W. Dotson, R. Baker, R. Bywater

引用次数: 0

Activities in Aeroelasticity at NASA Langley Research Center 美国宇航局兰利研究中心的气动弹性研究活动

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-10-01 DOI: 10.1115/imece1997-0160

Boyd Perry, T. Noll

引用次数: 14

Time-Discontinuous Stabilized Space-Time Finite Elements for Aeroelasticity 气动弹性的时间不连续稳定时空有限元

4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III Pub Date : 1997-01-21 DOI: 10.1115/imece1997-0156

Boris A Grohmann, Rolf Dornberger, D. Dinkler

{"title":"Time-Discontinuous Stabilized Space-Time Finite Elements for Aeroelasticity","authors":"Boris A Grohmann, Rolf Dornberger, D. Dinkler","doi":"10.1115/imece1997-0156","DOIUrl":"https://doi.org/10.1115/imece1997-0156","url":null,"abstract":"\u0000 A method for computational aeroelasticity in the time domain has been developed. Time-discontinuous Galerkin space-time finite elements have been employed for both the transonic fluid flow and the elastic aircraft wing structure. The resulting implicit time marching scheme is robust and higher order accurate.\u0000 In order to stabilize the convective term of the fluid flow and the elastic wave propagation phenomena in the structure a Galerkin least-squares term is added. For handling discontinuities, a consistent high order nonlinear shock-capturing viscosity is applied. The aerodynamics are modeled using the compressible Euler equations. Nonlinear Timoshenko beam elements are employed for the structure. The time dependent deformation of the fluid domain is modeled using space-time mappings for the FE geometry.\u0000 Based on the discretization of equal type for the fluid and the structure, an overall iterative solver strategy for the fully coupled problem is proposed. In each time step, a common loop combines the linearization of the fluid, structure and their coupling conditions. The iterative solution of the resulting linear subproblems is partly done by multigrid methods.","PeriodicalId":166345,"journal":{"name":"4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125062089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6