Objective - Develop a test method that is: Representative of Actual Conditions Repeatable and Consistent Obtainable by All Labs in All Parts of the World.

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Presentation transcript:

Objective - Develop a test method that is: Representative of Actual Conditions Repeatable and Consistent Obtainable by All Labs in All Parts of the World

Test Method Co-Developed With NPRM...Test Method Perfection...Release NPRM Delay Implementation Process

Discrepancies in Calibration and Requirements Cold-Side Heat Flux: 1.5 or 2.0 Btu/ft 2 sec? Air Inlet Velocity: 2000, 2100, or 2200 ft/min?? Burner Heat Flux: /-0.5, /- 0.8, or /- 0.8??? Requirements have changed as more is learned about the equipment Chance for industry to participate in the development of the requirements

Objective of Testing, Research, & Round Robin: Establish Similar Calibration Procedure Produce Similar Exposure From Burner Achieve Similar Test Results

Factors That Can Influence Calibration Air Intake Velocity Air Intake Temperature Fuel Flowrate Fuel Temperature Instrumentation (type/size of thermocouple, calorimeter type) Other Adjustments (position of igniters, static disc, tabs) Fuel Type (Jet A, Diesel, Fuel Oil) Environmental Conditions (relative humidity, barometric pressure)

Latest Calibration Procedure Temperature: (1850 +/- 100 o F) Adjust Fuel Flowrate to 6.0 +/- 0.2 gal/hr Adjust Burner Intake Air Velocity to /- 100 ft/min Heat Flux: (16.0 +/- 0.8 Btu/ft 2 sec) After 2-minute warm-up, swing burner into position, allow 1 minute stabilization, take reading for 30 seconds (once per second) and average, swing burner away from flame After 2-minute warm-up, swing burner into position, allow 1 minute stabilization, take reading for 30 seconds (once per second) and average, swing burner away from flame

Air Velocity/Airflow Measurement Reasons for measuring airflow at intake location: Allows for continuous monitoring Prevents removal/disruption of tabs Eliminates need to remove burner cone Intake velocity = Outlet velocity/

Intake Airbox Holding Air Velocity Meter

Intake Airbox

Data Collection Procedure is Critical Date: 11/24/99

Data Collection Procedure is Critical

Temperature Profile Bias

Location of Flame Enhancement Tab

Static Disc Mounted to Igniter Assembly

Material 1 Material 2 Material 3 Material 4 Round Robin Test Results (Initial)

Material 5 Material 6 Material 7 Material 8 Round Robin Test Results (Initial)