Digital Computer Analysis of Condensation in Highly Expanded Flows

Item

Title
Digital Computer Analysis of Condensation in Highly Expanded Flows
Date
1963
Index Abstract
Not Available
Photo Quality
Not Needed
Report Number
ARL 63-206
Creator
Griffin, James L.
Corporate Author
University of Michigan
Laboratory
Aerospace Research Laboratories
Extent
97
Identifier
AD0428303
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(657)-8867
DoD Project
7116
DoD Task
711601
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Abstract
The application of the IBM 7090 digital computer to the theoretical prediction of condensation in highly expanded flows is presented. The equations of the spontaneous nucleation theory of Frenkel are combined with the steady one-dimensional diabatic flow equations for a solution of the expansion of a pure vapor. A digital computer program for the solution of these equations is compiled and presented. The theoretical prediction of the condensation of nitrogen is compared to experimental results and variations in specific heat, latent heat of vaporization, surface tension, and rate of expansion are investigated. The theoretical calculation is applied to metal vapors and the results for copper and zinc vapors are presented. The results indicate that the theoretical solution gives a reasonable prediction of the condensation in highly expanded flows. The degree of supersaturation increases with an increased rate of expansion and for a proper set of initial conditions, condensation-free flow is obtainable. The rate of expansion and the surface tension are the most critical parameters in the equations for condensing flow. Variations of specific heat and latent heat of vaporization show only minor effects on the end result.
Report Availability
Full text available by request
Date Issued
1963-11
Provenance
IIT
Type
report
Format
97 pages ; 28 cm.