heat flux calibration task group 2011 march materials meeting savannah ga n.
Download
Skip this Video
Download Presentation
HEAT FLUX CALIBRATION TASK GROUP 2011 March Materials Meeting Savannah, GA

Loading in 2 Seconds...

play fullscreen
1 / 11

HEAT FLUX CALIBRATION TASK GROUP 2011 March Materials Meeting Savannah, GA - PowerPoint PPT Presentation


  • 114 Views
  • Uploaded on

HEAT FLUX CALIBRATION TASK GROUP 2011 March Materials Meeting Savannah, GA. Michael Burns, FAA Tech Center. March, 2011. AGENDA. History “Interim” Aviation Heat Flux Calibration Standard Proposed New Calibration Method (Draft) Radiant Panel Calibration Study

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'HEAT FLUX CALIBRATION TASK GROUP 2011 March Materials Meeting Savannah, GA' - michelle-grant


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
heat flux calibration task group 2011 march materials meeting savannah ga

HEAT FLUX CALIBRATION TASK GROUP2011 March Materials MeetingSavannah, GA

Michael Burns, FAA Tech Center

March, 2011

agenda
AGENDA
  • History
  • “Interim” Aviation Heat Flux Calibration Standard
  • Proposed New Calibration Method (Draft)
  • Radiant Panel Calibration Study
    • NSIT Calibrated Schmidt-Boelter HFG Data
  • Next Steps
brief history
BRIEF HISTORY

06/08 – Discovery of Heat Flux Gage Calibration Discrepancy

Visit to Manufacturers / NIST

06/09 – International Heat Flux Gage Calibration Study

Industry Submitted Gages To FAA Technical Center For Calibration Comparison

07/09 – Heat Flux Sensitivity Study Using Gages Installed In Test Apparatus (HRR, NBS Smoke Density & Radiant Panel tester)

10/09 – Sensitivity Study

Effect On Data By Varying Heat Flux Levels

10/10 – Development Of Interim Aviation Heat Flux Gage Calibration Standard

interim aviation heat flux calibration1
Interim Aviation Heat Flux Calibration

Calorimeter Specifications

  • Construction / Type - Gardon
  • Principle of Operation – Gardon Foil
  • Painted Surface Area – Partial vs. Full Face

Definitions

NIST Calibration

  • Single Point vs. Full Range (Based on 10 point Cal.)
  • FAA Flammability Heat Flux Requirements - Ranges

Calibration Interim

interim aviation heat flux calibration2
Interim Aviation Heat Flux Calibration

Calibration Method

  • Like gage with like gage – Manufacturer / Paint
  • Place Standardized HFG and Working HFG an equal distance from heat source (traditionally, opposite sides of a graphite plate)
  • Ramp up heat and record data on cool down
  • Calculate HFG Sensitivity

Calibration Procedure

Requirements – Repeatability / Reproducibility

Supplemental Section – General notes / Reporting

draft aviation heat flux calibration standard
Draft - Aviation Heat Flux Calibration Standard

Calorimeter Specifications

  • Construction / Type – Possibly including Schmidt-Boelter type gages
  • Principle of Operation – Possibly include Thermopile
  • Painted Surface Area – Changed so that only gages with entire front face painted will be used

Definitions – Minor Changes / Additions

NIST Calibration

  • FAA Flammability Heat Flux Requirements – Possibly change from nearest Range to exact heat flux point

Calibration Interim - Unchanged

draft aviation heat flux calibration standard1
Draft - Aviation Heat Flux Calibration Standard

Calibration Method

  • Like gage with like gage - Removed
  • Place Standardized HFG and Working HFG an equal distance from heat source (traditionally, opposite sides of a graphite plate) – Must be in exact same position
  • Ramp up heat and record data on cool down – Steady State
  • Calculate HFG Sensitivity – Possibly Add % STDEV

Calibration Procedure – Steady State, interchange positions

Requirements – Possibly Changed to Allowable % STDEV

Supplemental Section - Minor Changes / Additions

radiant panel validation study
Radiant Panel Validation Study

Gardon vs. Schmidt-Boelter

  • 2 Vatell (Full Paint), 1 Medtherm (Partial) & 1 Hukseflux (Partial) HFG Were Sent To NIST For Calibration
  • Radiant Panel Tester Set To 1.4 BTU/ft2*sec Using one of the Vatell Gages
  • Interchanged Vatell Gage with other 3 gages
slide10
NEXT
  • Continue to look at Schmidt-Boelter type gages
    • Install Gages Into OSU & NBS
  • Continue forward on “Interim” Aviation Heat Flux Calibration Method (Transition Target Date 06/01/11)
  • Continue Work On “Draft” Aviation Heat Flux Calibration Method via Task Group Participation
questions comments
Questions / Comments?

“The road to success is always under construction”

Unknown Author

ad