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PROPOSED BURNTHROUGH TEST METHOD CALIBRATION GUIDELINES. Objective of Testing:. Establish Similar Calibration Procedure. Produce Similar Exposure From Burner. Achieve Similar Test Results. Factors That Can Influence Calibration. Air Intake Velocity. Air Intake Temperature.

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PROPOSED BURNTHROUGH TEST METHOD CALIBRATION GUIDELINES


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objective of testing
Objective of Testing:
  • Establish Similar Calibration Procedure
  • Produce Similar Exposure From Burner
  • Achieve Similar Test Results
factors that can influence calibration
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)
  • Environmental Conditions (relative humidity, barometric pressure)
  • Fuel Type (Jet A, Diesel, Fuel Oil)
slide22

Effect of Tab Positioning on Temperature

Air Velocity = 2000 ft/min

Igniters @ 6:00

Average Temp = 1912oF

Result: Low on ends, too hot in middle

Air Velocity = 2000 ft/min

Igniters @ 6:00

Average Temp = 1927oF

Result: Too hot in middle

Air Velocity = 2000 ft/min

Igniters @ 6:00

Average Temp = 1890oF

Result: Low on ends, too hot in middle

slide23

Effect of Tab Positioning on Temperature

Air Velocity = 2000 ft/min

Igniters @ 6:00

Average Temp = 1957oF

Result: Low on ends, too hot in middle

Air Velocity = 1900 ft/min

Igniters @ 6:00

Average Temp = 1951oF

Result: Low on ends, too hot in middle

Air Velocity = 2000 ft/min

Igniters @ 9:00

Average Temp = 1860oF

Result: All temperatures in range

slide25

Day 1 Temperature Calibration @ Various Air Velocity Settings

Air Velocity = 1900 ft/min

Igniters @ 9:00

Average Temp = 1846oF

Result: All temperatures in range

Air Velocity = 2000 ft/min

Igniters @ 9:00

Average Temp = 1860oF

Result: All temperatures in range

Air Velocity = 2100 ft/min

Igniters @ 9:00

Average Temp = 1882oF

Result: All temperatures in range

Air Velocity = 2200 ft/min

Igniters @ 9:00

Average Temp = 1896oF

Result: All temperatures in range

slide26

Day 2 Temperature Calibration @ Various Air Velocity Settings

Air Velocity = 2000 ft/min

Igniters @ 9:00

Average Temp = 1826oF

Result: All temperatures in range

Air Velocity = 2100 ft/min

Igniters @ 9:00

Average Temp = 1832oF

Result: All temperatures in range

Air Velocity = 2200 ft/min

Igniters @ 9:00

Average Temp = 1864oF

Result: All temperatures in range

slide27

Day 3 Temperature Calibration @ Various Air Velocity Settings

Air Velocity = 1900 ft/min

Igniters @ 9:00

Average Temp = 1863oF

Result: All temperatures in range

Air Velocity = 2000 ft/min

Igniters @ 9:00

Average Temp = 1887oF

Result: All temperatures in range

Air Velocity = 2100 ft/min

Igniters @ 9:00

Average Temp = 1913oF

Result: Middle temperatures slightly high

slide35

Latest Calibration Procedure

Adjust Fuel Flowrate to 6.0 gal/hr

Adjust Burner Intake Air Velocity to 2200 ft/min

Temperature: (1850oF +/- 100oF)

  • 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

Heat Flux: (15.2 Btu/ft2 sec +/- 0.8 Btu/ft2 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
round robin burnthrough testing material selection
Round Robin Burnthrough TestingMaterial Selection
  • Quick-Failing Material (< 1 minute)
  • Long Duration Passing Material (> 5 minutes)
  • 1-2 Minute Material Combination
  • 2-3 Minute Material Combination
slide38

Round Robin Burnthrough Testing

Purpose

To identify problems encountered during calibration of test equipment to ensure similarity between labs

To prove similarity of test equipment through testing of identical samples

Cataloguing Method for Identifying Materials

Ins Thickness (in) - Ins Density (lb/ft3) - Ins Type - Add Barrier - Film - Weight Class (Thickness)

FG=Fiberglass

OPF=Oxidized Polyacrylonitrile Fiber

PAN=Polyacrylonitrile Fiber

RPI=Rigid Polyimide Foam

NEX=Nextel Ceramic Paper

FOP=Felted OPF

NQZ=Needled Quartz

CFS=Carbon Fiber Skrim

60=0.60

42=0.42

34=0.34

PET1=class 1 polyethylene terepthalate

PVF2=class 2 polyvinyl fluoride

PI=polyimide

FC=fluoropolymer composite

Example: 2-42-FG-NEX-PET-1

burnthrough test method round robin task group test facilities material suppliers
FAATC - Tim Marker

CEAT - Anne Mansuet

Darchem Flare - Darren Dodd

CTA - Anna Villate

Boeing - Hank Lutz

Daimler Chrysler - Bernd Menken

Johns Manville - Becky Wulliman

3M - Tom Tompkins

Mexmil - Dave Indyke

Accufleet - Jim Davis

Akro Fireguard - George Danker

International Aero - John Brooks

No Fire - Sam Gottfried

Orcon - Sherm Smith

3M - Tom Tompkins

Johns Manville - Becky Wulliman

Mexmil - Dave Indyke

Osaka Gas - Yo Ishikawa

Inspec Foams - Dan Trahan

Schneller - Dale Onderak

Facile - Paul Harencak

Lamart - Dave Shields

Jeheir - Jacques Maillard

Burnthrough Test Method Round Robin Task GroupTest Facilities Material Suppliers