Vacuum chamber with a supersonic flow aerodynamic window
Abstract
A supersonic flow aerodynamic window, whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 864386
- Patent Number(s):
- 4358249
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04F - PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- vacuum; chamber; supersonic; flow; aerodynamic; window; whereby; steam; ejector; situated; primary; exhausts; superheated; orifice; region; pressure; creating; barrier; gas; attempts; enter; mixing; outside; fluid; communication; combined; mixture; enters; impact; incoming; created; attempting; coupled; suitable; pumping; means; cooling; serves; negative; vacuum pumping; pumping means; superheated steam; cooling means; vacuum chamber; fluid communication; mixing chamber; vacuum pump; primary chamber; steam ejector; aerodynamic window; negative pressure; supersonic flow; heated steam; incoming gas; flow aerodynamic; vacuum exhaust; /417/
Citation Formats
Hanson, Clark L. Vacuum chamber with a supersonic flow aerodynamic window. United States: N. p., 1982.
Web.
Hanson, Clark L. Vacuum chamber with a supersonic flow aerodynamic window. United States.
Hanson, Clark L. Fri .
"Vacuum chamber with a supersonic flow aerodynamic window". United States. https://www.osti.gov/servlets/purl/864386.
@article{osti_864386,
title = {Vacuum chamber with a supersonic flow aerodynamic window},
author = {Hanson, Clark L},
abstractNote = {A supersonic flow aerodynamic window, whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}