Gasdynamics of Very Small Laval Nozzles
Abstract
An investigation of diverging supersonic nozzles with throat diameters in the range of 0.025 to 0.25 mm has been carried out using gasdynamic measurements for a variety of gases and mixtures with sulfur hexafluoride. Due to the small nozzle size, boundary layers, although thin, may constitute a major fraction of the flow or, indeed at low pressures, may be fully developed. Nevertheless these nozzles have been shown to be very efficient for production of clusters condensed from the expanding gas. They produce orders of magnitude increases in molecular beam intensities, relative to the conventional, isentropic free jet sources. The effects of gas properties and nozzle design on performance have been analyzed and compared to theoretical solutions to the governing equations of motion including cluster nucleation and growth.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1981
- Accession Number
- ADA098874
Entities
People
- Barry G. Deboer
- Gilbert D. Stein
- Jack H. Binn
- Oommen Abraham
Organizations
- Northwestern University