Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2009.11a
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- Pages.469-473
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- 2009
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- 1975-342X(pISSN)
Numerical and experimental investigation of non-stationary processes in the supersonic gas ejector
- Tsipenko, Anton (Moscow Aviation Institute) ;
- Kartovitskiy, Lev (Moscow Aviation Institute) ;
- Lee, Ji-Hyung
- ;
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- 이지형 (충남대학교 산학협력단)
- Published : 2009.11.19
Abstract
The supersonic gas ejector, as gas dynamic appliance, has been applied for a long time because of simplicity and reliability. However, for the prediction of ejector performances with given parameters, that is, working gas pressure and the nozzle shape, it is necessary to raise accuracy of modelling for properties of ejector gas flow. The purpose of the represented work is to compare one-dimensional modelling and numerical results with experimental results. The ejector with a conic nozzle has been designed and tested (Mach number at the nozzle exit section was 3.31, the nozzle throat diameter - 6 mm). Working gas - nitrogen, was brought from system of gas bottles. Diameter of the mixture chamber at the nozzle exit section was limited by condensation temperature of nitrogen and equaled 20 mm. The one-dimensional theory predicted the minimal starting pressure equaled 8.18 bar (absolute) and 0.051 bar in the vacuum chamber. Accordingly the minimal starting pressure was 9.055 bar and 0.057 in the vacuum chamber bar have been fixed in experiment.