Swirl Injection Effects on Hybrid Rocket Motors

In the last decades, hybrid rocket engines have been increasingly studied and used in space vehicles. However, the low regression rates and specific impulses still represent major drawbacks to this technology. The objective of this study was to quantify the relative improvement of regression rate va...

Full description

Saved in:
Bibliographic Details
Published in:Journal of aerospace technology and management 2015-10, Vol.7 (4), p.418-424
Main Authors: Gomes, Susane Ribeiro, Rocco Junior, Leopoldo, Rocco, José Atílio Fritz Fidel
Format: Article
Language:English
Subjects:
ENGINEERING, AEROSPACE
Hybrid rocket motor
Solid fuel regression rates
Swirl injector
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the last decades, hybrid rocket engines have been increasingly studied and used in space vehicles. However, the low regression rates and specific impulses still represent major drawbacks to this technology. The objective of this study was to quantify the relative improvement of regression rate values with the use of a swirling flow injector in comparison to an axial injector. Seven tests were conducted with axial injection and seven with swirl injection. Regression rate results were compared, and it was found that swirl injection improved regression rates in 50% for mass fluxes higher than 45 kg·s-1·m-2. It was possible to see radiation, kinetic and diffusion theory on the logarithmic plot of regression rate per oxidizer flux yielded by both injectors. A strong agreement with experimental findings of regression rates in the literature parameters is reported.
ISSN:2175-9146
2175-9146
DOI:10.5028/jatm.v7i4.368