HIAPER Modular Inlets (HIMIL) HIAPER Modular Inlets (HIMIL) & Instrument Exhaust System& Instrument Exhaust System

- Dave Rogers -- Dave Rogers -

OutlineOutline

HIMIL descriptionHIMIL description

contamination testingcontamination testing

re-install HIMIL to different locationsre-install HIMIL to different locations

particle passing efficienciesparticle passing efficiencies

instrument & exhaust pressuresinstrument & exhaust pressures

June 2006June 2006

HIMILHIMILaerosol + trace gas samplingaerosol + trace gas sampling

modular constructionmodular construction

contamination potentialcontamination potential

contamination contamination testingtesting

some data takensome data takenanalysis in progressanalysis in progress

configurations configurations for ProgScifor ProgSci

had to install long had to install long runs of tubingruns of tubing

routing of tubing from HIMIL to racksrouting of tubing from HIMIL to racks

estimated tubing lengthsestimated tubing lengths

effects of tubing lengtheffects of tubing length

Paul Baron’s spreadsheetPaul Baron’s spreadsheet

Estimating particle passing efficiencyEstimating particle passing efficiency

FLUENT modelingFLUENT modeling flow fieldflow field aspiration efficiencyaspiration efficiency

flow modeling – in progressflow modeling – in progress20,000 ft altitude, air speed 164 m s20,000 ft altitude, air speed 164 m s-1-1

velocity at the inlet face ~230 m velocity at the inlet face ~230 m -1-1

instrument & exhaust pressuresinstrument & exhaust pressures

nextnext??

derive size-dependent corrections of aerosol derive size-dependent corrections of aerosol particle concentration based on pressure & particle concentration based on pressure & tubing lengthtubing length

analyze for contamination evidenceanalyze for contamination evidence

add tube inside HIMIL & run FLUENT for add tube inside HIMIL & run FLUENT for range of flight conditionsrange of flight conditions

use FLUENT to estimate passing efficienciesuse FLUENT to estimate passing efficiencies