The impinging-type injector design of MMH/NTO liquid rocket engine

Tony Yuan, Cetera Chen, Berlin Huang, Marx Tang, Yu Ta Chen

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

1 Citation (Scopus)

Abstract

By the PLIF optical technique, this study focused on the development of the impinging type injector design of the 100-lbf level monomethylhydrazine/nitrogen tetroxide liquid rocket. The design of the multi-pair impinging injector plate is based on the cold flow and hot fire observations of unlike-doublet impinging jets of monomethylhydrazine/nitrogen tetroxide and their simulants. The mass distributions of the impinging jets from the cold flow observations are used to arrange the paired orifices of the impinging unit on the injector plate through a image projection method. For the most uniform distribution and the best overall estimated C* of the overall spray, the orifice size of the impinging element and the configuration of the paired orifices of an injector plate was determined for the prototype injector plate design. Static tests of the ground-test liquid rocket engine with the designed injector plate are performed. The measured sea-level thrust of the engine was 62.1 lb, and the characteristic exhaust velocity reached 1429.2 m/s at a total propellant mass flow rate of 153.4 g/s. The estimated vacuum thrust was 99.8 lb, and the vacuum Isp was 295.8 s as well. The combustor pressure of the liquid rocket engine was 153.2 psi and remained stable during operation. During the 17 seconds of the hot fire test, the highest wall temperature was measured at the nozzle throat, which was about 1000K.

Original languageEnglish
Title of host publication48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781600869358
DOIs
Publication statusPublished - 2012
Event48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012 - Atlanta, GA, United States
Duration: 2012 Jul 302012 Aug 1

Publication series

Name48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012

Other

Other48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
CountryUnited States
CityAtlanta, GA
Period12-07-3012-08-01

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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