Assessment of three numerical methods for the computation of a low-density plume flowResults from three numerical methods including one based on the Navier-Stokes equations, one based on kinetic theory using the DSMC method, and one based on the Boltzmann equation with a Krook-type collision term are compared to each other and to experimental data for a model problem of heated nitrogen flow in a conical nozzle expanding into a vacuum. The problem simulates flow in a resistojet, a low-thrust, electrothermal rocket. The continuum method is applied to both the internal flow and near-field plume. The DSMC and Boltzmann methods are applied primarily to the plume. Experimental measurements of Pitot pressure and flow angle, taken with an apparatus that duplicates the model nozzle flow, are used in the comparisons.
Document ID
19930066259
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Penko, Paul F. (NASA Lewis Research Center Cleveland, OH, United States)
Riley, Ben R. (Evansville Univ. IN, United States)
Boyd, Iain D. (Cornell Univ. Ithaca, NY, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA PAPER 93-2528
Meeting Information
Meeting: AIAA, SAE, ASME, and ASEE, Joint Propulsion Conference and Exhibit