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Title: Vacuum chamber with a supersonic-flow aerodynamic window

Abstract

A supersonic flow aerodynamic window is disclosed 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:
Issue Date:
OSTI Identifier:
5587390
Patent Number(s):
196998
Assignee:
Dept. of Energy TIC; ERA-07-025673; EDB-82-058501
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ORIFICES; FLOW BLOCKAGE; STEAM JET EJECTORS; DESIGN; OPERATION; VACUUM SYSTEMS; STEAM; SUPERHEATING; SUPERSONIC FLOW; FLUID FLOW; HEATING; OPENINGS; VAPOR JET EJECTORS; 420700* - Engineering- Vacuum Engineering- (-1987); 420400 - Engineering- Heat Transfer & Fluid Flow

Citation Formats

Hanson, C.L. Vacuum chamber with a supersonic-flow aerodynamic window. United States: N. p., 1980. Web.
Hanson, C.L. Vacuum chamber with a supersonic-flow aerodynamic window. United States.
Hanson, C.L. Tue . "Vacuum chamber with a supersonic-flow aerodynamic window". United States.
@article{osti_5587390,
title = {Vacuum chamber with a supersonic-flow aerodynamic window},
author = {Hanson, C.L.},
abstractNote = {A supersonic flow aerodynamic window is disclosed 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 = {1980},
month = {10}
}