Numerical investigation of the vortex core precession in a model hydro turbine with the aid of hybrid methods for computation of turbulent flows

This paper provides an up-to-date survey of the use of zonal detached eddy simulations (ZDES) for unsteady civil aircraft applications as a reflection on the stakes and perspectives of the use of hybrid methods in the framework of industrial aerodynamics. The issue of zonal or non-zonal treatment of turbulent flows for engineering applications is discussed. The ZDES method used in this article and based on a fluid problem-dependent zonalization is briefly presented. Some recent landmark achievements for conditions all over the flight envelope are presented, including low-speed (aeroacoustics of high-lift devices and landing gear), cruising (engine–airframe interactions), propulsive jets and off-design (transonic buffet and dive manoeuvres) applications. The implications of such results and remaining challenges in a more global framework are further discussed.

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NUMERICAL INVESTIGATION OF SEPARATED TRANSONIC TURBULENT FLOWS WITH A MULTIPLE-TIME-SCALE TURBULENCE MODEL

Numerical Heat Transfer Part A Applications ◽

10.1080/10407789008944788 ◽

1990 ◽

Vol 18 (2) ◽

pp. 149-171 ◽

Cited By ~ 14

Author(s):

S.-W. Kim

Keyword(s):

Numerical Investigation ◽

Turbulent Flows ◽

Turbulence Model ◽

Time Scale ◽

Multiple Time ◽

Multiple Time Scale ◽

Scale Turbulence

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Reduction of the condensation/evaporation dynamics for atmospheric aerosols: Theoretical and numerical investigation of hybrid methods

Journal of Aerosol Science ◽

10.1016/j.jaerosci.2005.09.004 ◽

2006 ◽

Vol 37 (8) ◽

pp. 950-966 ◽

Cited By ~ 10

Author(s):

Edouard Debry ◽

Bruno Sportisse

Keyword(s):

Numerical Investigation ◽

Atmospheric Aerosols ◽

Hybrid Methods ◽

Evaporation Dynamics

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Влияние способа подачи воздуха на параметры прецессирующего вихревого жгута в гидродинамической вихревой камере

Письма в журнал технической физики ◽

10.21883/pjtf.2018.05.45711.16786 ◽

2018 ◽

Vol 44 (5) ◽

pp. 79

Author(s):

C.В. Алексеенко ◽

С.И. Шторк ◽

Р.Р. Юсупов

Keyword(s):

Gas Phase ◽

Vortex Core ◽

Vortex Chamber ◽

Gas Content ◽

Sudden Expansion ◽

Effective Control ◽

Optimum Conditions ◽

Precessing Vortex Core ◽

Vortex Core Precession ◽

Full Pressure

AbstractThe effect of the method of gas-phase injection into a swirled fluid flow on parameters of a precessing vortex core is studied experimentally. Conditions of the appearance of the vortex-core precession effect were modeled in a hydrodynamic sudden expansion vortex chamber. The dependences of the vortexcore precession frequency, flow-pulsation level, and full pressure differential in the vortex chamber on the consumption gas content in the flow have been obtained. The results of measurements permit one to determine optimum conditions for the most effective control of vortex-core precession.

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