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Common Wind Tunnel Data Format

Common Wind Tunnel Data Format. Presentation Overview. Project Objectives WDF Format Medium Tools Project Planning Benefits for Customers Closing Remarks. Main Objectives of the Project. Replace present formats to abolish limitations and add new features

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Common Wind Tunnel Data Format

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  1. Common Wind Tunnel Data Format WDF-Presentation V1.6.1

  2. Presentation Overview • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  3. Main Objectives of the Project • Replace present formats to abolish limitations and add new features • Make onestandard software interface for data transfer to clients • Make data file platform independent • Provide customer with a coherent set of all wind tunnel test results • Provide customer with standard structure of output medium WDF-Presentation V1.6.1

  4. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  5. Wind Tunnel Test Results WDF-Presentation V1.6.1

  6. Wind Tunnel Test Results (cont’d) WDF-Presentation V1.6.1

  7. Network Common Data Form (netCDF) • Software interface developed at US universities in the framework of a National Science Foundation sponsored program to exchange atmospheric research data (1988) • Enables storage/retrieval of scientific data • Supports system independent data format (from PC to supercomputer) • Permit datasets to be transported between dissimilar computers transparently WDF-Presentation V1.6.1

  8. Use of netCDF • Advantages • Basic software available free-of-charge(sources/binaries library) • Many applications from users’ community freely available • Multiple software language support (FORTRAN, C, JAVA, Perl, …) WDF-Presentation V1.6.1

  9. Use of netCDF (cont’d) • Disadvantages • Limited software support (Unidata, users group) • Operating system OVMS (Alpha’s) has a limited number of users and therefore limited support WDF-Presentation V1.6.1

  10. Characteristics of Common Wind Tunnel Data Format • Compact binary format • Direct data access • Self-describing data • All kinds of variables (char, byte, short, int, float, double) • Accessible by standard products (e.g. MATLAB, AVS Express and Gsharp, PV-WAVE) • File will contain at least one polar and at most one test WDF-Presentation V1.6.1

  11. WDF File Layout WDF-Presentation V1.6.1

  12. Example of Contents of WDF File(converted/edited to ASCII) netcdf t0906s0713o005 { dimensions: recorddim = 8 ; ONE = 1 ; NrOfRec = 17 ; variables: float Machno-DATA-(NrOfRec) ; Machno-DATA-:long_name = "Machno " ; // global attributes: :Version = 105 ; :CreationDate = "Thu Jul 11 13:43:40 METDST 2002 " ; :Provider = "DNW" ; :Windtunnel = "ECF" ; data: Machno-DATA- = 0.179828, 0.180565, 0.180687, 0.180897, 0.180552, 0.18062, 0.180557, 0.180404, 0.180899, 0.180435, 0.181107, 0.180846, 0.179419, 0.181349, 0.180282, 0.181191, 0.181064 ; } WDF-Presentation V1.6.1

  13. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  14. Organisation of the Medium • Hierarchical directory organisation • Contains all relevant data and access software • Flexible organisation in three levels WDF-Presentation V1.6.1

  15. Hierarchical File Structure WDF-Presentation V1.6.1

  16. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  17. Viewer • Reads/displays WDF files • Allows filtering on SERIES, RUN, POLAR, DPN, Record, Variable • Saving and loading filters • Allow renaming of records and variables • Creation of a number of output formats (CSV, GMT, DNW, MATLAB, TECPLOT, WDF, xml for TARDIS) • Written in JAVA (platform independent) • Includes a test bench to verify correct working of WDF WDF-Presentation V1.6.1

  18. Plotter • Reads/plots WDF files • Selection criteria via GUI • Output to common image formats (CGM,PS, …) • Saving and loading layouts • Read multiple WDF files • Select x and y data • Multiple curves within same axes • Autoscaling or user defined • Based on Gsharp (AVS) graphical package • Comes with install scripts for various platforms WDF-Presentation V1.6.1

  19. Medium Index Creator • Permits medium access “horizontally” • Ability to produce a INDEX.HTML file • Permit client to access medium as a web site WDF-Presentation V1.6.1

  20. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  21. Project Planning 2002-2008 WDF-Presentation V1.6.1

  22. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  23. Main Benefits for Customers • Standard data format independent of wind tunnel • Standard structure of output medium • Removal limitations of present data formats, e.g. variable names, strings • Standard set of tools for data presentation is supplied (viewer, plotter, medium index creator, …) • Already defined standard formats remain unchanged (JPEG, TIFF, CSV, PDF, …) • Web page (public, free access) with latest versions of applications is maintained WDF-Presentation V1.6.1

  24. Overview Reminder • Project Objectives • WDF Format • Medium • Tools • Project Planning • Benefits for Customers • Closing Remarks WDF-Presentation V1.6.1

  25. Closing Remarks • Customer Actions • To view WDF files  install JRE for WDview • To plot WDF files  install Wdplot or ncBrowse • To convert WDF files  implement reader based on template WDread program WDF-Presentation V1.6.1

  26. Closing Remarks (cont’d) • What is available today • Converters to WDF (from GFO, RESULTS, TOUT files) • Viewers, WDF Website (see http://www.ata.aero ) • WDF Converters (to CSV, Matlab, Tecplot, GMT, TOUT, WDF) • WDF F90 and C library, JAVA classes • Medium Index Creator • Quality control tools • WDF converter to XML • Browser documentation • Demonstration to EWA partner • What is planed in the future • WdView (selection criteria mechanism on contents instead of variable names) WDF-Presentation V1.6.1

  27. Miscellaneous • http://www.ata.aero public website • Wdf-users-l@ata.aero to get infos (updates) To subscribe/unsubscribe to the mailing list: Mail to Info-wdf@ata.aero with the request in the text • Info-wdf@ata.aero to ask a question about WDF WDF-Presentation V1.6.1

  28. Points of Contact • DNW D. Krack detlef.krack@dnw.aero • ONERA B. Lallement bernard.lallement@onera.fr WDF-Presentation V1.6.1

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