Altitude Testing of a Single ASM System

1
Altitude Testing of a Single ASM System

• International Aircraft Systems Fire Protection
  Working Group
• Atlantic City, NJ
• October 30 - 31, 2002

Steve Summer Project Engineer Federal Aviation
Administration Fire Safety Branch, AAR-422
2
Objectives

• Obtain static data of a single ASM systems
  output operating in both a HF/LP and LF/HP mode.
• Obtain dynamic data of a single ASM systems
  output throughout a given flight profile
  operating in a LF/HP mode during ascent and
  cruise and a HF/LP mode during descent.
• Compare data with predictive model output.

3
Controlled Parameters

• Inlet pressure
• Controlled via a manual pressure regulator
• Inlet air temperature and purity
• Controlled to 180 10 ºF via M750 and secondary
  air circulation heater
• Ambient pressure
• Controlled via environmental chamber and manual
  dive port
• Orifice Sizes
• Controlled via needle valves, set to desired sea
  level NEA concentrations

4
Measured Parameters

• NEA output flow
• Measured by an insertion mass flow meter
• NEA output purity
• Measured by O2 analyzer
• Pressure drop across the membrane
• Measured by DP meter
• Pressure drop across the orifice
• Calculated as DPor Pin - DPmem - Pamb

5
Test Plan

• Size the LF/HP orifice to give an output of 5 O2
  at SL conditions.
• Size the HF/LP orifice to give an output of 11
  O2 at SL conditions.
• Conduct tests operating under both flow
  conditions at incremental altitudes up to 42 kft.
• Simulate a representative flight profile,
  controlling ambient and ASM inlet pressure.

6
(No Transcript)
7
Static Data Results
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
Flight Simulation Results
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
Conclusions

• The system performed favorably at static points
  and throughout a given flight simulation.
• High flow conditions produced NEA flow and purity
  data consistent with predictive model output.
• Some corrections need to be made to the
  predictive model under low flow conditions.