Add to ORKGQuantitative evidence of gas flows in the far upstream region of small nozzles with large boundary layer flow are discussed. Gas mass fluxes were measured using quartz crystal microbalances. Both nitrogen and carbon dioxide gases were used as test gases. Gas deposition rates on the order of 100 monolayers per minute were detected 13 inches upstream of the nozzle exit plane. It is significant to note that the crystals detected gases considerably beyond the Prandtl-Meyer turning angle. The data from these tests will be essential in the formulation of scaling laws and analytical prediction methods for viscous plume behavior
The self-induced molecular contamination around the space station could have adverse effects on spac...
The ASTM E-1559 apparatus has been used for years at NASA/Goddard Space Flight Center (GSFC) to dete...
In October 1987, NSF, NASA, and NOAA jointly sponsored a workshop at Columbia University to assess t...
A series of tests were conducted to measure the mass flux in the far field of a nozzle plume in a hi...
Molecular sink facility and 25-foot space simulator have been used to distinguish nature of exhaust ...
As a part of the electrothermal propulsion plume research program at the NASA Lewis Research Center,...
Measurements of mass flux and flow angle were taken throughout the forward flow region of the exhaus...
Instrumentation for the measurement of plume exhaust specie deposition rates were developed and demo...
Pitot pressures and flow angles are measured in the plume of a nozzle flowing nitrogen and exhaustin...
The removal of gas material through a capillary opening in a surface is analyzed. The gas, from whic...
The Quartz Crystal Microbalance was calibrated and its response to particle size and mass concentrat...
Electron beam measurements of gas densities and rotational temperatures in viscous nozzle flo
The potential spacecraft contaminants in the exhaust plume of a 0.89N monopropellant hydrazine thrus...
The components resulting from the deposition of inorganic salts (e.g., Na2S04) and oxides present in...
Measurements of the pulsed plasma thruster (PPT) plume upstream mass flux were made in the Molecular...
The self-induced molecular contamination around the space station could have adverse effects on spac...
The ASTM E-1559 apparatus has been used for years at NASA/Goddard Space Flight Center (GSFC) to dete...
In October 1987, NSF, NASA, and NOAA jointly sponsored a workshop at Columbia University to assess t...
A series of tests were conducted to measure the mass flux in the far field of a nozzle plume in a hi...
Molecular sink facility and 25-foot space simulator have been used to distinguish nature of exhaust ...
As a part of the electrothermal propulsion plume research program at the NASA Lewis Research Center,...
Measurements of mass flux and flow angle were taken throughout the forward flow region of the exhaus...
Instrumentation for the measurement of plume exhaust specie deposition rates were developed and demo...
Pitot pressures and flow angles are measured in the plume of a nozzle flowing nitrogen and exhaustin...
The removal of gas material through a capillary opening in a surface is analyzed. The gas, from whic...
The Quartz Crystal Microbalance was calibrated and its response to particle size and mass concentrat...
Electron beam measurements of gas densities and rotational temperatures in viscous nozzle flo
The potential spacecraft contaminants in the exhaust plume of a 0.89N monopropellant hydrazine thrus...
The components resulting from the deposition of inorganic salts (e.g., Na2S04) and oxides present in...
Measurements of the pulsed plasma thruster (PPT) plume upstream mass flux were made in the Molecular...
The self-induced molecular contamination around the space station could have adverse effects on spac...
The ASTM E-1559 apparatus has been used for years at NASA/Goddard Space Flight Center (GSFC) to dete...
In October 1987, NSF, NASA, and NOAA jointly sponsored a workshop at Columbia University to assess t...