Publication Detail

Vacuum Pumpdown Model for Long Outgassing Tubes

Michael J. Ernst, Harold Hemond
10 pp.
MITSG 95-11J
$3.50 (5.50 for overseas requests). DOM

A model is described that was created to help develop a vapor sampling probe for identifying volatile environmental contaminants "in situ". To model the total pressure behavior of a vacuum system during pumpdown, researchers developed a two-component (water vapor and air) model for vacuum flow with outgassing in a long tube. The model is generally applicable to any vacuum system composed of cylindrical elements and may be used to predict the behavior of vacuum systems through the entire range of flow when outgassing parameters are known.

type: Technical reports

Parent Project

Project No.: 1995-RO-41
Title: Membrane Inlet Mass Spectrometry for Chemical Measurement in-situ and from Autonomous Underwater Vehicles