Fire Test

International Aircraft Systems Fire Protection Working Group Meeting

Liquid Burner Development for Powerplant Fire TestNexGen Burner, Gas Burner Comparison; Operating Orientation of NexGen Burner

Yi-Huan Kao, Samir Tambe, and San-Mou Jeng Fire Test Center University of Cincinnati May 23-24, 2012

Project Objective:

– Develop the operating settings for NexGen burner for powerplant fire tests

• • NexGen burner should simulate previously FAA approved oil burners NexGen burner should be robust and repeatable

Approach:

– Sensitivity of NexGen burner setup on burner temperature and heat flux calibration (International Aircraft Systems Fire Protection Working Group, May 2011) – Fire test results from NexGen burner operated at the same heat flux and temperatures (International Aircraft Systems Fire Protection Working Group, November 2011) – Comparison of fire test results between NexGen and Gas burner – Fire test results from NexGen burner operated at different orientations – Derive the NexGen burner settings (future work)

Conclusion of previous works (1)

For calibration purpose, NexGen burner is much more sensitive to a change in the fuel flow rate as opposed to a change on air flow rate.

 Even though the calibration of the NexGen burner was not sensitive to change in air flow rate, tests conducted on samples indicated that air flow had an impact on damage induced by the burner

8% less air baseline 8% more air

Conclusion of previous works (2)

Thermocouple size does affect the temperature calibration data, as well as the result of fire test.

Smaller thermocouples read the higher measured temperature. Test sample tested with flame calibrated by smaller thermocouple survived longer .

TCs used for calibration small TCs big TCs Test Conditions Fuel (GPH) 2.14 2.25 Air (SCFM) 60.4 62.2 Calibration Data Temp. (F) 1907.9 1919.6 Heat Flux (BTU/ft^2-s) 9.0 9.4

Result for calibration with big TCs

Result for calibration with small TCs...