Vacuum chamber with a supersonic flow aerodynamic window

Patent · Fri Jan 01 00:00:00 EST 1982

OSTI ID:864386

Hanson, Clark L ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4358249
• OSTI ID: 864386
• Country of Publication: United States
• Language: English

Related Subjects

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
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