/2829 November 2007 WDF-Presentation V Common Wind Tunnel Data Format

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Presentation Overview

/2829 November 2007 WDF-Presentation V  Replace present formats to abolish limitations and add new features  Make one standard 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 Main Objectives of the Project

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V Wind Tunnel Test Results

/2829 November 2007 WDF-Presentation V Wind Tunnel Test Results (cont’d)

/2829 November 2007 WDF-Presentation V  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 Network Common Data Form (netCDF)

/2829 November 2007 WDF-Presentation V 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, …) Use of netCDF

/2829 November 2007 WDF-Presentation V Disadvantages  Limited software support (Unidata, users group)  Operating system OVMS (Alpha’s) has a limited number of users and therefore limited support Use of netCDF (cont’d)

/2829 November 2007 WDF-Presentation V  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 Characteristics of Common Wind Tunnel Data Format

/2829 November 2007 WDF-Presentation V WDF File Layout

/2829 November 2007 WDF-Presentation V 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- = , , , , , , , , , , , , , , , , ; }

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V Organisation of the Medium Hierarchical directory organisation Contains all relevant data and access software Flexible organisation in three levels

/2829 November 2007 WDF-Presentation V Hierarchical File Structure

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V  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 Viewer

/2829 November 2007 WDF-Presentation V  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 Plotter

/2829 November 2007 WDF-Presentation V  Permits medium access “horizontally”  Ability to produce a INDEX.HTML file  Permit client to access medium as a web site Medium Index Creator

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V Project Planning

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V  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 Main Benefits for Customers

/2829 November 2007 WDF-Presentation V  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

/2829 November 2007 WDF-Presentation V 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 Closing Remarks

/2829 November 2007 WDF-Presentation V Closing Remarks (cont’d)  What is available today - Converters to WDF (from GFO, RESULTS, TOUT files) - Viewers, WDF Website (see ) - 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)

/2829 November 2007 WDF-Presentation V Miscellaneous  website  get infos (updates) To subscribe/unsubscribe to the mailing list: Mail to with the request in the  ask a question about WDF

/2829 November 2007 WDF-Presentation V  DNWD. Krack  ONERAB. Points of Contact