liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Advanced Flow Simulation Methods in Aircraft Design
Linköping University, Department of Mechanical Engineering.
2002 (English)In: Aircraft Engineering and Aerospace Technology, ISSN 0002-2667, Vol. 74, no 2, 138-146 p.Article in journal (Refereed) Published
Abstract [en]

The compressible Navier-Stokes equations are solved numerically for turbulent transonic aerospace applications on parallel computers. An Explicit Algebraic Reynolds Stress Model (EARSM) models the turbulence. Expressing the EARSM as an extension of an eddy-viscosity model makes the implementation straightforward in a flow solver with existing two-equation eddy-viscosity models. The k-? transport equations are used as a platform for the model. The EARSM approach significantly improves the shock position for transonic flow over wings without substantial increase in computational cost. Industrial use of advanced flow modelling requires a short turn-around time of computations. This is enabled through the use of parallel computers. To achieve good parallel performance the computational load has to be evenly distributed between the processors of the parallel computer. A heuristic algorithm is described for distributing and splitting the blocks of a structured multiblock grid for a good static load balance. Speed-up results are presented for turbulent flow around a wing on a number of parallel platforms.

Place, publisher, year, edition, pages
2002. Vol. 74, no 2, 138-146 p.
Keyword [en]
Aerodynamics, Aircraft, Computational fluid dynamics, Turbulence
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-13838DOI: 10.1108/00022660210420843OAI: diva2:21803
Available from: 2006-05-05 Created: 2006-05-05
In thesis
1. Application of Parallel Computers to Enhance the Flow Modelling Capability in Aircraft Design
Open this publication in new window or tab >>Application of Parallel Computers to Enhance the Flow Modelling Capability in Aircraft Design
2006 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The development process for new aircraft configurations needs to be more efficient in terms of performance, cost and time to market. The potential to influence these factors is highest in early design phases. Thus, high confidence must be established in the product earlier than today. To accomplish this, the concept of virtual product development needs to be established. This implies having a mathematical representation of the product and its associated properties and functions, often obtained through numerical simulations. Building confidence in the product early in the development process through simulations postpones expensive testing and verification to later development stages when the design is more mature.

To use this in aerodynamic design will mean introducing more advanced physical modelling of the flow as well as significantly reducing the turn around time for flow solutions.

This work describes the benefit of using parallel computers for flow simulations in the aircraft design process. Reduced turn around time for flow simulations is a prerequisite for non-linear flow modelling in early design stages and a condition for introducing high-end turbulence models and unsteady simulations in later stages of the aircraft design process. The outcome also demonstrates the importance of bridging the gap between the research community and industrial applications.

The computer platforms are very important to reduce the turn around time for flow simulations. With the recent popularity of Linux–clusters it is now possible to design cost efficient systems for a specific application. Two flow solvers are investigated for parallel

performance on various clusters. Hardware and software factors influencing the efficiency are analyzed and recommendations are made for cost efficiency and peak performance.

Place, publisher, year, edition, pages
Institutionen för konstruktions- och produktionsteknik, 2006. 39 p.
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1246
flow modelling, parallel computer, parallel efficiency, turbulence modelling, aircraft design, CFD
National Category
Fluid Mechanics and Acoustics
urn:nbn:se:liu:diva-6398 (URN)91-85523-82-8 (ISBN)
2006-06-15, Maskinkonstruktions seminarierum (MASS), Ingång 17, Hus A, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Report code: LiU-TEK-LIC-2006:27.Available from: 2006-05-05 Created: 2006-05-05 Last updated: 2009-06-04

Open Access in DiVA

No full text

Other links

Publisher's full textLink to Licentiate Thesis

Search in DiVA

By author/editor
Sillén, Mattias
By organisation
Department of Mechanical Engineering
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 31 hits
ReferencesLink to record
Permanent link

Direct link