Closedform model for threedimensional vacuum plumes from a scarfed nozzle
Abstract
A simple closedform model for a threedimensional vacuum plume is based upon satisfying mass and momentum conservation, while assuming a maximum density along the skewed thrust vector. Expansion at the nozzle lip is based on the local flow conditions around the nozzle periphery. The model can use either analytical or testdetermined thrust vector coefficients. The present method was used to calculate the flowfield constants for a 10deg halfangle conical nozzle and to calculate the plume flowfield for a typical ACS engine. For zero angles, the model collapses to an axisymmetric form, applicable up to the inviscid plume boundary angle.
 Publication:

AIAA Journal
 Pub Date:
 May 1984
 DOI:
 10.2514/3.48497
 Bibcode:
 1984AIAAJ..22..719R
 Keywords:

 Attitude Control;
 Exhaust Flow Simulation;
 Flow Distribution;
 Rocket Exhaust;
 Conical Nozzles;
 Exhaust Nozzles;
 Mathematical Models;
 Scarfing;
 Spacecraft Control;
 Thrust Vector Control;
 Fluid Mechanics and Heat Transfer