Preliminary Analysis of Particulate Infiltration into Space System Volumes
Abstract
To understand the dynamics of airborne particulate intrusion into a simulated space telescope and other space system volumes, a simple model was developed to predict the extent to which ambient particles penetrate through vent holes and enter the volume interiors after the purge is off. This report describes the mathematical modeling analysis, experimental data from laboratory studies, and field measurements from launch processing. It was found that the characteristic time for infiltrating particulates to reach a saturation level inside the volume can be characterized by the air exchange rate and particle deposition rate. After the purge is turned off, the steady-state particulate concentrations inside the volume are governed by the ambient, air cleanliness level outside the telescope, air exchange rate, and particle deposition rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2007
- Accession Number
- ADA473752
Entities
People
- De-ling Liu
- Kenneth T. Luey
Organizations
- The Aerospace Corporation