Investigation on the pressure matching performance of the constant area supersonic-supersonic ejector

Chen, Jian; Wang, Zhenguo; Wu, Jianfei; Xu, Wanwu

doi:10.2298/tsci120405114c

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…At present, in the practice of rocketry, the development of cruise missiles with hypersonic flight speeds is intensively developing [1][2][3][4][5][6][7][8]. Using of ramjet engines on solid propellants is one of the most promising directions for solving the problem of increasing the speed of flight of flying apparatus in the atmosphere [2,3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of working processes in a flowing channel of ramjet engine

et al. 2019

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The technique and results of experimental-theoretical study of gas-dynamics, heat transfer and the structure of gas-flow in the flowing channel of a ramjet engine in Mach number range M = (5-7) are presented. The temperature distribution along the flowing channel of a ramjet engine was experimentally obtained. The temperature along the wall of the flowing channel of the axisymmetric model was measured using the developed thermo-probe. Distributions of Mach number and temperature along the symmetry axis of the flowing channel of the model are obtained numerically. Comparison of the numerical and experimentally obtained values of the Mach number showed their qualitative agreement.

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Section: Introductionmentioning

confidence: 99%

Investigation of working processes in a flowing channel of ramjet engine

et al. 2019

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“…For optimization efforts on the mixing chamber geometry, it could be pointed to the research published by Palacz et al [12]. Some scholars paid attention to changing the pressure and temperature operating conditions of ejectors with axial-radial [14] or axial-axial [15] flows. Composition of the inlet streams, e.g.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Operating Conditions on the Performance of a Steam Jet-Ejector

Sabzpoushan¹,

Darbandi²,

Schneider³

2018

Proceedings of the 5th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'18)

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-In this paper, the focus is on an existing steam jet-ejector, in which the primary flow is high pressure superheated steam and the suction flow is a mixture of saturated steam and air. The main goal of this work is to improve the ejector performance via proper setting of its working conditions such as setting motive, suction and discharge pressures and even primary and secondary streams composition, albeit if it is possible. From the computational perspective, the modelling and simulation of fluid flow are very complicated in an ejector because of facing with simultaneous subsonic and supersonic regimes, very high and very low pressure regions close to each other inside the ejector, complex turbulent mixing, and imperative heat transfer conditions. This study aims to improve the entrainment ratio of the existing steam jet-ejector by investigating its performance under different operating conditions and reduce the consumption of motive steam, which is a critical issue in the current human society because of facing with major global warming and water crisis conditions. The results show that by lowering the motive pressure, the achieved entrainment ratio increases up to 51% percent, while the ejector critical back pressure decreases. Obeying the current strategy, the annual water consumption of the vacuum system can be reduced about 3000 m 3 in the current combined power cycle unit.

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