Burnthrough Task Group Report
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Burnthrough Task Group Report. Tim Marker. FAA Technical Center. Review of Heat Flux Mapping. Not all flame profiles identical, despite near-identical set-up, and intake air velocities (2150 ft/min). Highest area of heat flux is not always in the area where the heat

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Tim marker

Burnthrough Task Group Report

Tim Marker

FAA Technical Center


Tim marker

Review of Heat Flux Mapping

Not all flame profiles identical, despite near-identical set-up, and

intake air velocities (2150 ft/min).

Highest area of heat flux is notalways in the area where the heat

flux is currently measured.

Use of 6 by 12-inch calibration block to measure profile very

tedious and time-consuming.

Continuous method of measurement was preferred, to simplify

the process, and reduce the amount of time involved.


Tim marker

Review of Heat Flux Mapping

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

Revised Burner Mapping Procedure

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

Position 1


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 2


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 3


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 4


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 5


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 6


Tim marker

Revised Burner Mapping Procedure

Move entire board 1 inch, 10 second data collection

Position 7


Tim marker

Revised Burner Mapping Procedure

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

Position 1


Tim marker

Revised Burner Mapping Procedure

Drop entire board down 1 inch, repeat process

Position 8


Tim marker

Revised Burner Mapping Procedure

Position 9


Tim marker

Revised Burner Mapping Procedure

Position 10


Tim marker

Revised Burner Mapping Procedure

Position 11


Tim marker

Etc., Etc., Etc….


Tim marker

Details of Revised Mapping Device

Board Material: ceramic fiber reinforced structural alumina composite refractory sheet

Supplied by ZIRCAR Refractory Composites, Inc.

P.O. Box 489

Florida, New York 10921

Tel: 845-651-2200, Fax: 845-651-1515

http://208.228.96.228/index.htm

Type: RS-100, Dimensions: ¾ by 24 by 48 inches


Tim marker

Revised 3-Hole Mapping Device


Tim marker

Revised 3-Hole Mapping Device


Tim marker

Revised 3-Hole Mapping Device


Tim marker

Conclusions

Original mapping method too tedious and time consuming, and too susceptible to

minor deviations (cool down period, board size, etc.).

Continuous mapping using stronger board material (with sufficient protection for

operator) resulted in board failure.

Continuous mapping using revised, 3-hole design also resulted in board failure.

Limited data collected during continuous mapping produced results similar to

original mapping tests using 6 by 12-inch calibration block.

Recommend concluding the mapping exercise, and proceed with the next material

round robin.

Possibly continue the development of the IR mapping device, and compare these

results to those obtained previously using the manual mapping methods.


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