CFD codes and applications at boeing

Tinoco, Edward N.

doi:10.1007/bf02812178

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…Besides delivering satisfactory zero-lift drag values, the viscous coupled calculation shall also be able to handle shock-boundary layer interaction. Tinoco affirms that the full potential equation offers a quick alternative for analyzing transonic flow with a good degree of accuracy [41]. Eqs.…”

Section: Considerations About Flow Modelingmentioning

confidence: 81%

Model-based and Signal-Based Inverse Methods

2022

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The engineering sector drives and enables the development of a country. The formation of an engineer allows a technical capacity to evaluate, plan, design, suggest and apply all possible techniques in search of the best construction of a technological equipment. Currently, the engineer must be more and more prepared to solve existing problems in various sectors of society. It is through it that societies grow in search of progress. The recognition of engineering and the training of new professionals increases every year in Brazil. In the 2000s, the University of Brasília (UnB) went through an expansion process, resulting in the implementation of the new UnB Engineering Campus in the city of Gama (UnB-Gama, FGA). Five new undergraduate courses were created: Aerospace Engineering, Automotive Engineering, Electronic Engineering, Energy Engineering and Software Engineering. The UnB Gama Campus project converges to increase the education level of the Brazilian population, especially in the five areas of engineering activity, all in line with current national public policies, aimed at expanding the population's access to quality higher education in the country. Following the high quality teaching line, the UnB-Gama campus has the Graduate Program in Integrity of Engineering Materials (PPG-Integridade). The program has the following lines of research: Dynamics and Vibrations, Fatigue, Structural Materials, Biomaterials, Structure Fluid Interaction and Numerical Simulation of the Mechanical Behavior of Materials. This book series is an initiative of PPG-Integridade -UnB, organized as a collaborative work involving researchers, engineers, scholars, from several institutions, universities, industry, recognized both nationally and internationally.Beside the high technical quality and relevance of the topics covered in the books, this series will enable an essential internationalization of the research currently developed within the University of Brasília. Several authors from different countries also contributed to these books, enabling greater interaction between national and international research groups. This internationalization raises the level of academic education for new professionals in the field of engineering, in addition to more advanced scientific research and technological development. Additionally, this book series features a strong contribution from the industrial sector. Several professionals from different companies collaborated with the writing of some chapters in the three volumes that make up this series. These initiatives are of great strategic importance, as they allow the grouping of different technical capabilities. On the part of companies in the sector, with knowledge of market demands, and on the part of universities, by adding the technical-scientific knowledge of their team of researchers to the improvement of innovative products and services. This book should be appreciated by anyone in need of knowledge of Materials Integrity. The completeness of Discrete Modeling and Inverse Methods theory c...

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Section: Considerations About Flow Modelingmentioning

confidence: 81%

Model-based and Signal-Based Inverse Methods

2022

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“…In previous work on hybrid FV/FE schemes for the Navier-Stokes equations [28][29][30][31], all simulations have been performed with a classical sequential implementation, allowing the use of only one CPU core for a simulation, even on modern multi-core workstations. In order to reduce the computational cost and perform large simulations with complex geometries and fine meshes needed in CFD for aircraft and vehicles, see (e.g., [54][55][56][57][58]) and references therein for an overview, it is essential to use a parallel implementation. In this paper, the hybrid FV/FE scheme has been parallelized by using the Message-Passing Interface (MPI) standard.…”

Section: Introductionmentioning

confidence: 99%

A Massively Parallel Hybrid Finite Volume/Finite Element Scheme for Computational Fluid Dynamics

2021

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In this paper, we propose a novel family of semi-implicit hybrid finite volume/finite element schemes for computational fluid dynamics (CFD), in particular for the approximate solution of the incompressible and compressible Navier-Stokes equations, as well as for the shallow water equations on staggered unstructured meshes in two and three space dimensions. The key features of the method are the use of an edge-based/face-based staggered dual mesh for the discretization of the nonlinear convective terms at the aid of explicit high resolution Godunov-type finite volume schemes, while pressure terms are discretized implicitly using classical continuous Lagrange finite elements on the primal simplex mesh. The resulting pressure system is symmetric positive definite and can thus be very efficiently solved at the aid of classical Krylov subspace methods, such as a matrix-free conjugate gradient method. For the compressible Navier-Stokes equations, the schemes are by construction asymptotic preserving in the low Mach number limit of the equations, hence a consistent hybrid FV/FE method for the incompressible equations is retrieved. All parts of the algorithm can be efficiently parallelized, i.e., the explicit finite volume step as well as the matrix-vector product in the implicit pressure solver. Concerning parallel implementation, we employ the Message-Passing Interface (MPI) standard in combination with spatial domain decomposition based on the free software package METIS. To show the versatility of the proposed schemes, we present a wide range of applications, starting from environmental and geophysical flows, such as dambreak problems and natural convection, over direct numerical simulations of turbulent incompressible flows to high Mach number compressible flows with shock waves. An excellent agreement with exact analytical, numerical or experimental reference solutions is achieved in all cases. Most of the simulations are run with millions of degrees of freedom on thousands of CPU cores. We show strong scaling results for the hybrid FV/FE scheme applied to the 3D incompressible Navier-Stokes equations, using millions of degrees of freedom and up to 4096 CPU cores. The largest simulation shown in this paper is the well-known 3D Taylor-Green vortex benchmark run on 671 million tetrahedral elements on 32,768 CPU cores, showing clearly the suitability of the presented algorithm for the solution of large CFD problems on modern massively parallel distributed memory supercomputers.

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“…Since the modern tactical aircraft has geometrical complexities and is expected to perform complex maneuvers, computational fluid dynamics (CFD) can be used as a decent alternative to experimentation for conceptual design analysis. As evident by its versatile use in Boeing (Tinoco 1991), CFD offers the capacity to solve a range of complicated flow problems where the empirical approach is inadequate, such as vortex dominated flows at high AoA. In the past, CFD faced several challenges in the conceptual design stage.…”

Section: Introductionmentioning

confidence: 99%

Computational Aerodynamics Study of Competing Conceptual Designs for Advanced Tactical Fighter Aircraft

Siddiqui

Naseer

Zahid

et al. 2021

J. Aerosp. Technol. Manag.

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Advanced tactical fighter (ATF) configurations are bound to perform high angle of attack (AoA) maneuvers. However, existing conceptual design tools available in aerospace industry are based on empirical or potential flows that cannot predict aerodynamic data in nonlinear regimes. High-fidelity computational fluid dynamics algorithms have to be incorporated during conceptual design phase for better assessment between competing configurations. In this research, steady state aerodynamic analysis is conducted to compare four conceptual designs of advanced tactical fighters through Reynolds-averaged Navier-Stokes (RANS) simulations. Prior to the study, two validation test cases were conducted based on ONERA M6 Wing and benchmark unmanned combat air vehicle (UCAV) design to assess the computational setup for the problem. Pressure based solver is used to model the flow field in subsonic, transonic and supersonic regimes at sea level for all four competing designs. The quantitative results include the aerodynamic forces and the longitudinal stability coefficient comparisons among the models and its components. The qualitative analyses include pressure distribution, eddy shedding and behavior of vortices at varying flow angle. Additionally, the empirical estimation for interpolation and post-stall extrapolation are carried out for further flight performance studies.

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CFD codes and applications at boeing

Cited by 3 publications

References 36 publications

Model-based and Signal-Based Inverse Methods

Model-based and Signal-Based Inverse Methods

A Massively Parallel Hybrid Finite Volume/Finite Element Scheme for Computational Fluid Dynamics

Computational Aerodynamics Study of Competing Conceptual Designs for Advanced Tactical Fighter Aircraft

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