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Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, 2010 1 The Impact of High Performance Computing On.

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Presentation on theme: "Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, 2010 1 The Impact of High Performance Computing On."— Presentation transcript:

1 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, The Impact of High Performance Computing On the Development Of Boeing Commercial Airplanes Douglas N. Ball Chief Engineer Aerodynamic Characteristics and Flight Performance

2 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, Pre-1960 Environment No real computing effort Airplanes designed entirely through wind tunnel and flight testing

3 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, DC-8 Installed Nacelle Drag Unexpected drag rise

4 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, ’s – early Supercomputing Early supercomputer – Control Data CDC 6600 Early linear potential flow –No viscosity –No rotationality –No shocks

5 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, /200/200Adv 8% miss on drag level

6 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, / cruise Mach number miss

7 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, Late 70’s – Progress CDC 6600 First Cray 1 Linear potential with coupled boundary layer –Include viscosity Early full potential and Euler codes with coupled boundary layer –Viscosity –Weak shocks –Rotational flows

8 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, and 767 Leading Edge Loads Higher Than Predicted Fuel mileage better than predicted

9 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, Late 80’s / early 90’s – Progress First Cray Y-MP Routine: Full potential and Euler with coupled boundary layer –Viscosity and rotationality Early full Navier Stoke codes

10 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, Issues - minor Cruise Mach number Airfoil aft loading Stab and elevator effectiveness Lateral control effectiveness

11 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, /700/800/900 (NG) Flaps up stall characteristics and thrust reverser flow

12 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, Late 90’s / early 2000’s – Progress Cray X1 Enter the PC Clusters Automated: Full potential and Euler with coupled boundary layer –Viscosity and rotationality Full Navier Stoke codes –Overset and unstructured grids High lift –More complex geometry and flow physics

13 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, The and 747-8

14 Copyright © 2010 Boeing. All rights reserved D. N. Ball HPC User Forum – Beijing, China October 30, NG stateoftheartModernclosecoupled nacelleinstallation, 0.02Machfasterthan %thickerfaster wingthan757, 767technology Highlyconstrained wingdesign Fasterwingthan Successful multipointopti- mizationdesign CFDfor Loadsand Stabilityand Control 11 Fasterand moreefficient thanprevious aircraft Wind Tunnel vs. CFD Boeing Products CFD Tools Increased computational capability & accuracy Less testing, lower cost, better products base 4x 60x CFD runs Boeing Tools A502A488TRANAIR Optimization TLNS3D-MB ZEUS CFL3D/ZEUS CFD++ Unstructured adaptive grid 3D-NS Cartesian Grid Tech Wings Tested COPYRIGHT © 2005 THE BOEING COMPANY CFD Has Significantly Improved the Wing Development Process Copyright © 2010 Boeing. All rights reserved

15 D. N. Ball HPC User Forum – Beijing, China October 30, Conclusions Prior to 1980 errors often occurred in the cruise portion of the flight envelope. These were often expensive and time-consuming to fix, and they directly affected the value of the airplane to the airline. Since 1980 we’ve been pretty good with attached flow performance prediction. Focus is now on expanding the use of CFD throughout the flight envelope (loads, stability and control, high lift) The advances in both computational hardware and software have enabled better airplanes to be designed, in less time and cost and with fewer surprises in flight test


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