An Analytical Model for a Two-Phase Vacuum Plume.
Abstract
A simple analytical model is proposed that specifies the gas and particle mass, momentum, and kinetic energy fluxes in a two-phase vacuum plume from a solid propellant rocket motor. The objective is to provide a description of the undisturbed plume structure for use in plume impingement assessments. Analytical expressions for the angular and radial dependence of the gas and particle flows are chosen based on a comparison with two-phase method-of-characteristics solutions and a spherical source flow model for plumes at large distances (more than 10 exit radii) from the nozzle exit. The model accurately predicts the gas mass flux but overpredicts the gas momentum flux. Both the particle mass and momentum flux are underpredicted by from 12 to 33 percent in the cases examined. A comparison with other approximate models for two-phase plumes suggests the model described herein offers improved accuracy and a more realistic specification of the spatial structure of both the gaseous and particle plumes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1975
- Accession Number
- ADA013738
Entities
People
- B. E. Pearce
Organizations
- The Aerospace Corporation