Accession Number : AD0738641

Title :   Molecular Beam Extraction from Equilibrium Gas Flows,

Corporate Author : AERODYNAMISCHE VERSUCHSANSTALT GOETTINGEN (WEST GERMANY) ABTEILUNG RAUMFAHRTAERODYNAMIK

Personal Author(s) : Bossel,Ulf

Report Date : 08 JUN 1971

Pagination or Media Count : 4

Abstract : The report presents a model for the formation of shock beams. Re-expansion downstream of the compression region may be present, but the dominating phenomenon appears to be effusion from a beam source region which itself is moving at the subsonic velocity U2. Also, the proposed shock beam model does not conflict with the results of electron beam studies by McMichael and French since bow shock formation is restricted to denser flows than studied. As far as the use of nozzle beams for diagnostic purposed is concerned, the regions behind or within normal shocks appear to be no longer off-limits for molecular beam sampling, if the observations are related to analyses which incorporate the shock beam model in its proposed or in a modified form. (Author)

Descriptors :   (*GAS FLOW, *MOLECULAR BEAMS), MATHEMATICAL MODELS, SHOCK WAVES, SEPARATION, LABORATORY EQUIPMENT, SAMPLING, SOURCES, WEST GERMANY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE