Effects of sidewall configurations on rectangular plug nozzle performance

Hidemasa Miyamoto, Akiko Matsuo, Takayuki Kojima

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

9 Citations (Scopus)


Effects of side wall geometry on performance of rectangular plug nozzle are studied for pre-cooled turbojet engine. Numerical simulation is used to analyze flowfield structures of plug nozzle with various side wall lengths and edge angles for optimal, over-expanding, and under-expanding conditions. For each, thrust efficiency is obtained and compared with full length side wall nozzle in search of the most costly efficient design configuration. When the sidewalls were contracted to half of their original length, the maximum thrust efficiency decrease was 1.8%, and when the walls were removed, 6-10% decrease occurred. On the other hand, difference in sidewall edge angle barely had effect on the flowfield and thrust performance. Effects of external flow on plug nozzle performance was also studied, and the drag at the boat tail region and the sidewall edges caused 7.2% thrust efficiency decrease at optimal expansion compared to the case without external flow.

Original languageEnglish
Title of host publicationCollection of Technical Papers - AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference
Number of pages10
Publication statusPublished - 2006 Dec 1
EventAIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference - Sacramento, CA, United States
Duration: 2006 Jul 92006 Jul 12

Publication series

NameCollection of Technical Papers - AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference


OtherAIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference
Country/TerritoryUnited States
CitySacramento, CA

ASJC Scopus subject areas

  • Space and Planetary Science
  • Energy(all)
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering


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