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A theoretical study of the performance of resistojet nozzles

Record type: Thesis (Doctoral)

The theoretical development of four computer models of resistojet nozzle performance is reported. Five main energy loss processes are accounted for; these are (i) frozen chemical rate processes, (ii) finite rate vibrational relaxation, (iii) incomplete expansion, (iv) viscous flow and (v) radial flow.

The nozzle flow is assumed to be composed of an inviscid core and a viscous boundary layer, where the boundary layer is represented by the patching together of similar solutions of the laminar boundary layer equations. General similar boundary layer equations have been developed which include the radial dependences accounting for transverse curvature. Four simplified classes of similar equations are identified, and extensive solutions have been obtained for the Falkner-Skan equation and a modified Falkner-Skan equation which includes the effects of transverse curvature, over the range of pressure gradient parameter, g, from 0. to 10. Vibrational relaxation is modelled by using an approximate sudden freezing criterion.

Performance predictions are presented for H2, CH4, CO2 and NH3 for plenum temperatures extending from 300 to 3000°K and plenum pressures from 200 to 10 kNm-2. A wide variety of nozzle geometries is also considered. The results are compared with the predictions of the slender channel model of Rae and with experimental measurements.

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Citation

Edwards, I. (1972) A theoretical study of the performance of resistojet nozzles University of Southampton, Faculty of Engineering and Applied Science, Doctoral Thesis , 293pp.

More information

Published date: September 1972
Organisations: University of Southampton

Identifiers

Local EPrints ID: 192565
URI: http://eprints.soton.ac.uk/id/eprint/192565
PURE UUID: b9ed1244-bdb0-4dbe-bd2e-e82cb6cf07be

Catalogue record

Date deposited: 11 Jul 2011 14:21
Last modified: 18 Jul 2017 11:31

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Contributors

Author: I. Edwards
Thesis advisor: R.E.W. Jansson

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