HIAPER Modular Inlets (HIMIL)

1
HIAPER Modular Inlets (HIMIL) Instrument
Exhaust System- Dave Rogers -

• Outline
• HIMIL description
• contamination testing
• re-install HIMIL to different locations
• particle passing efficiencies
• instrument exhaust pressures

June 2006
2
HIMILaerosol trace gas samplingmodular
construction
3
contamination potential
4
contamination testingsome data takenanalysis
in progress
5
configurations for ProgScihad to install long
runs of tubing
6
routing of tubing from HIMIL to racks
7
estimated tubing lengths
8
effects of tubing length
9
Paul Barons spreadsheet
10
Estimating particle passing efficiency

• FLUENT modeling
• flow field
• aspiration efficiency

11
flow modeling in progress20,000 ft altitude,
air speed 164 m s-1velocity at the inlet face
230 m -1
12
instrument exhaust pressures
13
next ?

• derive size-dependent corrections of aerosol
  particle concentration based on pressure tubing
  length
• analyze for contamination evidence
• add tube inside HIMIL run FLUENT for range of
  flight conditions
• use FLUENT to estimate passing efficiencies