Investigation of injectant molecular weight effect on the transverse jet characteristics in supersonic crossflow

Zhang, Yujie; Liu, Weidong; Wang, Bo; Zhao, Yanhui; Zhang, Duo

doi:10.1016/j.actaastro.2015.05.008

Cited by 10 publications

(2 citation statements)

References 54 publications

(62 reference statements)

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“…On one hand, it could be used as the logic control system components to achieve a variety of logic functions. On the other hand, through a small energy control signals, it also could be served as an implementation part of the control system and offer much large energy or torque directly [4][5][6][7]. Nowadays the supersonic jet element is applied to the Multiple Launch Rocket System project as the implemental components of the control system.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of switching mechanism for the supersonic jet element

Zhang

2017

Acta Astronautica

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Based on the unsteady viscous flow simulation, the flow characteristics inside the supersonic jet element have been investigated numerically. The corresponding initial switching process has been overall divided into two major stages. The results have shown that the switching process for the supersonic jet flow is an extremely complex process, which can include the complex shock system evolution, the free shear layers together with the boundary layers evolution and multiple vortex region unsteady evolution etc. The presence of the switching oblique shock near the control port is not the necessary condition to make the jet deflect, but its formation is good for the early transverse extension of the stripping vortex zone. A new concept named minimum control mass flow rate has also been proposed and emphasized. The Viscosity and adverse pressure gradient have been found to be the key factors for the occurrence of flow separation to shorten the switching time. The vortex structures at different switching time together with the variations (thrust, static pressure as well as oblique shock waves etc.) inside the supersonic jet element have been obtained computationally and analyzed in details.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of switching mechanism for the supersonic jet element

Zhang

2017

Acta Astronautica

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“…In order to enhance the mixing process between the injectant and air, the influence of the injector configuration has been evaluated by many researchers [10] [11] [12] [13] [14], as well as the staged injection strategy [15] [16]. Lee and Mitani [17] proposed a method to promote the streamwise vorticity by modifying the injector geometry using a cavity to increase the mixing rate, as well as the fuel penetration property, but additional loss of stagnation pressure was induced.…”

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confidence: 98%