1. Tim Marker Discussion of Burner Heat Flux Mapping for Proposed Insulation Burnthrough Test Standard FAA Technical Center

2. 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. ____________________ The flame profile is a useful tool in making lab-to-lab comparisons.

3. Pre-Set heat flux measuring locations

11. Conclusions of Initial 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 flux is currently measured. Future testing could investigate the impact of intake air velocity on the heat flux/flame profile. Size of heat flux transducer mounting plate could impact results.

12. IN = OUT

13. Burnthrough Task Group Assignments Standardize stator position using tool manufactured by Boeing Standardize intake hose type and length Standardize reducer fitting from hose to airbox Standardize heat flux mapping procedure Standardize intake air velocity measuring technique

14. Standardized Air Intake/Velocity Measuring System

15. Standardized Air Intake System

16. Standardized Intake Airbox

18. Standardized Reducer Fitting

20. Heat Flux Mapping Rig

21. Heat Flux Mapping, Second Series…

28. Intake Velocity vs Heat Flux Profile

31. Conclusions of Mapping (2 nd 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 SSDD

32. 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