Pressure recovery in mixing ducts of ejector-ramjets

Eijiro Kitamura, Tohru Mitani, Shenghong Huang, Goro Masuya

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

5 Citations (Scopus)

Abstract

Pressure recovery performances of circular and rectangular mixing ducts were investigated. Cold flow experiments were conducted using supersonic-subsonic ejectors. Afterburning in the second combustor was simulated by inserting plugs into exits of the mixing ducts. Maximum pressures in the mixing ducts and the pressure recovery lengths, namely, the distance from the rocket nozzle exit to the maximum pressure points, were measured when the mass flow rates of the breathed airflow and rocket exhaust were changed. The maximum pressures in the rectangular mixing ducts were about 5% lower than those of the circular ducts. However, the pressure recovery lengths of the rectangular ducts were 50% longer than those of the circular ducts. This may be due to the asymmetric flow in the rectangular ducts caused by the separations and the corner effects. Recovery performances of the short ducts, which were ten times longer than hydraulic diameters of each mixing duct, were investigated. More than 20% differences of the recovery performances were observed in the short ducts.

Original languageEnglish
Title of host publicationA Collection of Technical Papers - 13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
Pages1923-1930
Number of pages8
Publication statusPublished - 2005 Dec 21
Event13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference - Capua, Italy
Duration: 2005 May 162005 May 20

Publication series

NameA Collection of Technical Papers - 13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
Volume3

Conference

Conference13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
CountryItaly
CityCapua
Period05/5/1605/5/20

ASJC Scopus subject areas

  • Engineering(all)

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