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Computation Of Flow Over A Drag Prediction Workshop Wing Body Transport Configuration Using Cfl3d
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721287796 Total Pages :40 pages Book Rating :4.2/5 (877 download)
Book Synopsis Computation of Flow Over a Drag Prediction Workshop Wing/Body Transport Configuration Using Cfl3d by : National Aeronautics and Space Administration (NASA)
Download or read book Computation of Flow Over a Drag Prediction Workshop Wing/Body Transport Configuration Using Cfl3d written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Drag Prediction Workshop was held in conjunction with the 19th AIAA Applied Aerodynamics Conference in June 2001. The purpose of the workshop was to assess the prediction of drag by computational methods for a wing/body configuration (DLR-F4) representative of subsonic transport aircraft. This report details computed results submitted to this workshop using the Reynolds-averaged Navier-Stokes code CFL3D. Two supplied grids were used: a point-matched 1-to-1 multi-block grid, and an overset multi-block grid. The 1-to-1 grid, generally of much poorer quality and with less streamwise resolution than the overset grid, is found to be too coarse to adequately resolve the surface pressures. However, the global forces and moments are nonetheless similar to those computed using the overset grid. The effect of three different turbulence models is assessed using the 1-to-1 grid. Surface pressures are very similar overall, and the drag variation due to turbulence model is 18 drag counts. Most of this drag variation is in the friction component, and is attributed in part to insufficient grid resolution of the 1-to-1 grid. The misnomer of 'fully turbulent' computations is discussed; comparisons are made using different transition locations and their effects on the global forces and moments are quantified. Finally, the effect of two different versions of a widely used one-equation turbulence model is explored. Rumsey, Christopher L. and Biedron, Robert T. Langley Research Center NASA/TM-2001-211262, NAS 1.15:211262, L-18132
Book Synopsis Computation of Flow Over a Drag Prediction Workshop Wing/Body Transport Configuration Using CFL3D by :
Download or read book Computation of Flow Over a Drag Prediction Workshop Wing/Body Transport Configuration Using CFL3D written by and published by . This book was released on 2001 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computation of Flow Over a Drag Prediction Workshop Wing by : United States. National Aeronautics and Space Administration
Download or read book Computation of Flow Over a Drag Prediction Workshop Wing written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Opportunities for Breakthroughs in Large-Scale Computational Simulation and Design by :
Download or read book Opportunities for Breakthroughs in Large-Scale Computational Simulation and Design written by and published by . This book was released on 2002 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Opportunities for breakthroughs in the large-scale computational simulation and design of aerospace vehicles are presented. Computational fluid dynamics tools to be used within multidisciplinary analysis and design methods are emphasized. The opportunities stem from speedups and robustness improvements in the underlying unit operations associated with simulation (geometry modeling, grid generation, physical modeling, analysis, etc.). Further, an improved programming environment can synergistically integrate these unit operations to leverage the gains. The speedups result from reducing the problem setup time through geometry modeling and grid generation operations, and reducing the solution time through the operation counts associated with solving the discretized equations to a sufficient accuracy. The opportunities are addressed only at a general level here, but an extensive list of references containing further details is included.
Book Synopsis Drag Prediction and Decomposition for Airfoils and Wings by : David Dai-Wei Chao
Download or read book Drag Prediction and Decomposition for Airfoils and Wings written by David Dai-Wei Chao and published by . This book was released on 2004 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CFD-based Aircraft Drag Prediction and Reduction by : H. Deconinck
Download or read book CFD-based Aircraft Drag Prediction and Reduction written by H. Deconinck and published by . This book was released on 2003 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA Langley Scientific and Technical Information Output-2001 by :
Download or read book NASA Langley Scientific and Technical Information Output-2001 written by and published by . This book was released on 2002 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transonic Drag Prediction Using an Unstructured Multigrid Solver by : Dimitri J. Mavriplis
Download or read book Transonic Drag Prediction Using an Unstructured Multigrid Solver written by Dimitri J. Mavriplis and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes the results obtained with the NSU3D unstructured multigrid solver for the AIAA Drag Prediction Workshop held in Anaheim, CA, June 2001. The test case for the workshop consists of a wing-body configuration at transonic flow conditions. Flow analyses for a complete test matrix of lift coefficient values and Mach numbers at a constant Reynolds number are performed, thus producing a set of drag polars and drag rise curves which are compared with experimental data. Results were obtained independently by both authors using an identical baseline grid, and different refined grids. Most cases were run in parallel on commodity cluster-type machines while the largest cases were run on an SGI Origin machine using 128 processors. The objective of this paper is to study the accuracy of the subject unstructured grid solver for predicting drag in the transonic cruise regime, to assess the efficiency of the method in terms of convergence, cpu time and memory, and to determine the effects of grid resolution on this predictive ability and its computational efficiency. A good predictive ability is demonstrated over a wide range of conditions, although accuracy was found to degrade for cases at higher Mach numbers and lift values where increasing amounts of flow separation occur. The ability to rapidly compute large numbers of cases at varying flow conditions using an unstructured solver on inexpensive clusters of commodity computers is also demonstrated.
Download or read book Lecture series written by and published by . This book was released on 2003 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Aircraft written by and published by . This book was released on 2009 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA Aerospace Sciences Meeting and Exhibit, 42nd by :
Download or read book AIAA Aerospace Sciences Meeting and Exhibit, 42nd written by and published by . This book was released on 2004 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Analysis and Drag Prediction for Transonic Transport Wing/body Configurations Using a Viscous-inviscid Interaction Type Method by : J. van Muijden
Download or read book Flow Analysis and Drag Prediction for Transonic Transport Wing/body Configurations Using a Viscous-inviscid Interaction Type Method written by J. van Muijden and published by . This book was released on 1995 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Power-Based Study of Boundary Layer Ingestion for Aircraft Application by : Peijian Lv
Download or read book Power-Based Study of Boundary Layer Ingestion for Aircraft Application written by Peijian Lv and published by Springer Nature. This book was released on 2022-09-14 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents research on Boundary Layer Ingestion (BLI). BLI is an aircraft-engine integration technique that aims at integrating the aircraft and the propulsion system such that the overall aircraft fuel consumption can be reduced. In this research, theoretical analysis suggests that the minimization of total power consumption should be used as a design criterion for aircraft utilizing BLI rather than focusing on the minimization of drag. Numerical simulations are performed, and the simulation results are processed using the PBM to support the theoretical analysis. Furthermore, an experimental study is carried out with a focus on the power conversion processes involved for a propulsor operating in the wake. Stereoscopic PIV is employed in order to visualize the flow and understand the physics. The so-called Power-based Method is used to quantify the power conversion mechanisms. The results prove that the dominant mechanism responsible for the efficiency enhancement is due to the utilization of body wake energy by the wake ingesting propeller. In short, the importance of wake energy flow rate in understanding the BLI phenomenon is highlighted. This book will be useful for researchers in the field of aircraft propulsion, aircraft aerodynamics, and airframe propulsion integration.
Book Synopsis Accurate Computation of Drag for a Wing/body Configuration Using Multi-block, Structured-grid CFD Technology by : O. J. Boelens
Download or read book Accurate Computation of Drag for a Wing/body Configuration Using Multi-block, Structured-grid CFD Technology written by O. J. Boelens and published by . This book was released on 2001 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 43rd AIAA Aerospace Sciences Meeting & Exhibit by :
Download or read book 43rd AIAA Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 2005 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inlet Flow Computation Using CFL3D by : Amol Limaye
Download or read book Inlet Flow Computation Using CFL3D written by Amol Limaye and published by . This book was released on 1999 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
