Numerical simulation of the lateral aerodynamics of an orbital stage at stage separation flow conditions

Cvrlje, T.; Breitsamter, Christian; Laschka, Boris

doi:10.1016/s1270-9638(00)00132-2

Cited by 23 publications

(2 citation statements)

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“…The discretization of viscous fluxes employ advection upstream splitting method (AUSM), which was proved to be very stable for the hypersonic applications. 29 And the discretization of inviscous fluxes adopted second-order upwind method. The solution for the present steady-state calculations was based on an implicit time solver.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Comparison research of two different improved methods in the 2D hypersonic inlet’s design

Yang

Luo

Huang

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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The article mainly employed the numerical simulation method to conduct the 2D hypersonic inlet performance research. In this study, the numerical simulation method that includes a two-equation turbulence model was validated through the test case firstly. For the purpose of oppressing unstart phenomena, extending operating range and improving comprehensive performance of the inlet, the bleeding system and isentropic expansion arc surface were applied to the inlet, respectively. Different kinds of configurations were designed through changing the length of the bleeding or changing the radius of the arc surface. The influence of the bleeding and isentropic expansion arc surface on the 2D hypersonic inlet was analyzed systematically based on different objective parameters. The calculative results show that the bleeding system with appropriate value of the length can improve comprehensive performance of hypersonic inlet remarkably either on the design point or the off-design points, though it has a very small negative impact on the inlet in terms of the mass flow ratio coefficient. As for isentropic expansion arc surface, it can improve the inlet's performance at the design point on the conditions that the radius of isentropic expansion arc surface has an appropriate value. But it has much more disadvantages over the basic configuration reversely when it comes to the off-design conditions or the large size of the radius of isentropic expansion arc surface.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

Comparison research of two different improved methods in the 2D hypersonic inlet’s design

Yang

Luo

Huang

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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show abstract

“…A modern and efficient aerodynamic method is applied to compute the forces and moments with high numerical precision. For this purpose, the FLM-Eu Code, a computer program developed at the Institute of Fluid Mechanics of the Technische Universita¨t Mu¨nchen, was used (Cvrlje et al 2000;Jiang et al 2003). The FLM-Eu Code is a program for modelling fluid flow around complex geometries and obtaining results of high numerical precision.…”

Section: Yawing Moment Characteristics Of Wingsmentioning

confidence: 99%

Yaw stability in gliding birds

Sachs

2005

J Ornithol

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A new concept for describing the yaw stability in gliding birds is presented. This concept introduces dynamic stiffness in yaw as an appropriate indication of stability. Other than the conventional metric of static yaw stability given by the gradient of the aerodynamic yawing moment with respect to the sideslip angle, the dynamic stiffness does not only provide a qualitative indication of stability but also a precise quantitative measure of the restoring action in the yaw axis. With the use of scaling relations, it is shown that the dynamic stiffness of birds is sufficiently high though their static yaw stability may be very small. The underlying mechanism is that the yaw moment of inertia is more reduced with a decrease in size than the restoring aerodynamic moment. Reference is made to the yaw stability in aircraft and related flying qualities requirements. Thus, numerical values are derived which can be used as a standard of comparison providing a rating basis for the dynamic yaw stiffness in small flying objects, like birds. Furthermore, it is shown that the wings of birds produce yawing moments due to sideslip so large that a sufficiently high level of dynamic yaw stiffness can be achieved. From the results derived in this paper, it may be concluded that birds-unlike aircraft-need no vertical tail for yaw stability.

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Unsteady interaction and dynamic stability analysis of a two-stage-to-orbit vehicle during transverse stage separation

Wang,

Wang

2024

Acta Astronautica

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Numerical simulation of the lateral aerodynamics of an orbital stage at stage separation flow conditions

Cited by 23 publications

References 0 publications

Comparison research of two different improved methods in the 2D hypersonic inlet’s design

Comparison research of two different improved methods in the 2D hypersonic inlet’s design

Yaw stability in gliding birds

Unsteady interaction and dynamic stability analysis of a two-stage-to-orbit vehicle during transverse stage separation

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