# Presentation: 724067

## Tim Marker

- Discussion of Burner Heat Flux Mapping for
- Proposed Insulation Burnthrough Test Standard

- FAA Technical Center

## Heat Flux Mapping of Burner Flame

- Purpose: To produce a burner flame profile to determine if the high
- heat flux area(s) are in the same location as the current location used
- during calibration.

- Methodology: Use existing heat flux transducer (calorimeter) to
- measure the heat flux at a variety of pre-set locations.
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- The flame profile is a useful tool in making lab-to-lab comparisons.

## Pre-Set heat flux measuring locations

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## Conclusions of Mapping (2nd time)

- Standardization of intake system likely reduced lab-to-lab differences

- Full analysis of progress very difficult:

- Standardized mapping procedure not fully adhered to (2 of 5 mapped differently)

- Small data set (only 5 of 9 labs reporting)

- Elimination of “highly irregular” flame profiles

## Future Considerations

- Standardization of calorimeter mounting block size/type

- Standardization of initial temperature of calorimeter block

- Use the 6- by 12-inch marinite block specified in proposed Rule,

- Use another agreed-to size/type of mounting block

- Thermocouple imbedded into mounting block surface provides accurate
- initial temperature

- Heat soak the calorimeter prior to start of mapping

- Revised data collection procedure

- Continuous collection of all 21 data points without shutting burner off

## Heat Flux Transducer Sample Holder

- Used for Continuous Data Collection

## Heat Flux Transducer Sample Holder

- Used for Continuous Data Collection

## Heat Flux Transducer Sample Holder

- Used for Continuous Data Collection

## Heat Flux Transducer Sample Holder

- Used for Continuous Data Collection

- Insufficient board material between holes

- Crack!

## Revised Pre-Set Heat Flux Measuring Locations

## Initial Result Using Marinite Board

- Marinite-inorganic calcium silicate board

## Second Result Using Zircal-95 Board

- Zircal 95-high density calcium silicate hydrate mix

## Second Result Using Zircal-95 Board

## Conclusions

- Continuous mapping of burner flame using pre-drilled
- sample board/heat flux transducer _very_ difficult.

- Future of HF mapping

- Original mapping method, with sufficient cooling time between locations.

- Imbedded thermocouple placed in mapping block to ensure appropriate start time.

- Continuous mapping using thicker/stronger board material, with sufficient
- protection for operator.

- Alternative approach using IR camera.

## Tim Marker

- FAA Technical Center

- Burnthrough Task Group Report

## Slide 21

## Revised Burner Mapping Procedure

- 2 minute warm-up + 1 minute soak, 10 second data collection

- Position 1

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 2

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 3

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 4

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 5

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 6

## Revised Burner Mapping Procedure

- Move entire board 1 inch, 10 second data collection

- Position 7

## Revised Burner Mapping Procedure

- Move entire board back to 1st position, 10 second data collection

- Position 1

## Revised Burner Mapping Procedure

- Position 8

- Drop entire board down 1 inch, repeat process

## Revised Burner Mapping Procedure

- Position 9

## Revised Burner Mapping Procedure

- Position 10

## Revised Burner Mapping Procedure

- Position 11

## Summary of New Mapping Process

- FAATC will draft up detailed drawings of new mapping board, including details such
- as material type, thickness, density, etc.

- Individual labs will be responsible for constructing their own mapping board.

- International Aero will continue its development of the IR mapping device, and a
- comparison of the 2 methods can be made prior to the next meeting.

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