Experimental Investigation of NexGen and Gas Burner for FAA Fire Test

The NexGen (sonic) burner is a new burner designed by the Federal Aviation Administration (FAA) Tech Center for the required FAA fire certification tests on Powerplant. The objective of this study is to understand the performance of this burner and provide the benchmark to adapt the burner setting for future FAA fire tests. The NexGen burner was found to satisfy the temperature and heat flux requirements under FAA fire test guidelines. This NexGen burner was modified by adding four tabs to turbulator in the current study and was found to result in wider and more uniform flames which increase the burner robustness for the fire test. Calibrations of heat flux and thermocouple temperature from NexGen burner were much more sensitive to a change in the fuel flow rate as opposed to a change in air flow rate. However, the fire test results on the samples were also sensitive to air flow rate. It is recommended that both fuel and air flow rate of NexGen burner should be regulated in future FAA fire tests. The influence of thermocouple size on flame calibrations and fire test results was studied. The burner calibrated with smaller thermocouple size will produce less damage on the test sample. It is recommended that FAA should have a narrower tolerance on the thermocouple size used in the temperature calibrations. The performance of ISO gas burner was also studied. Heat flux produced by ISO gas burner was found much lower than that by NexGen burner, and the damage induced by gas burner in a horizontal orientation is significantly less than that by the NexGen burner. Fire tests were conducted on two different sample sizes. Smaller sample could survive longer under the same burner operating conditions. It is recommended that the sample size should be specified in future FAA fire tests.

Name thesis:degree_name

MS

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Engineering and Applied Science: Aerospace Engineering

Grantor dc:publisher

University of Cincinnati

Year dc:date

2012

Author dc:creator

• Kao, Yi-Huan

Contributors dc:contributor

• Jeng, San-Mou

• Engineering
• fire test
• NexGen burner
• gas burner

Statement dc:rights

• unrestricted
• This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.

Language dc:language

English

Repository record dc:identifier

http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424

OAI identifier oai:identifier

oai:etd.ohiolink.edu:ucin1353156424