Verification firings of end-burning type hybrid rockets

Harunori Nagata, Hayato Teraki, Yuji Saito, Ryuichiro Kanai, Hiroyuki Yasukochi, Masashi Wakita, Tsuyoshi Totani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

The authors have proposed end burning type hybrid rockets. A key point of this idea is that a motor uses cylindrical fuel having many ports in axial direction, in which oxidizer gas flows. Because of difficult requirements to make an end burning type solid fuel grain, i.e., high volumetric filling rate above 0.95 and small port intervals, the end burning hybrid rocket was yet to be achieved. This paper reports results of verification firing tests of an end burning type hybrid rocket being realized for the first time. Recent progress of 3D printers made the production of the fuel grain possible. The results clearly show the initial transient and the steady periods of the end burning mode. It also proves a virtue of no oxidizer to fuel ratio shift during firing. Since the initial transient is a period for the exit end face to attain a steady state shape, an initial end face shape being close to the steady state shape can shorten this period. A firing test with a fuel having tapered ports showed that it attains a steady state in less than 1 second, which is much shorter than a non-tapered case of about 6 seconds.

Original languageEnglish
Title of host publication51st AIAA/SAE/ASEE Joint Propulsion Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103216
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015 - Orlando, United States
Duration: 2015 Jul 272015 Jul 29

Publication series

Name51st AIAA/SAE/ASEE Joint Propulsion Conference

Other

Other51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015
CountryUnited States
CityOrlando
Period15/7/2715/7/29

ASJC Scopus subject areas

  • Engineering(all)

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