Numerical Simulation of the Flow Field Around Supersonic Air-Intakes
| Autor: | O. Penanhoat, G. Freskos |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Engineering
Shock (fluid dynamics) Computer science business.industry Turbulence Mechanical Engineering Energy Engineering and Power Technology Aerospace Engineering Mechanical engineering Upwind scheme Aerodynamics Mechanics Computational fluid dynamics Euler equations Physics::Fluid Dynamics Boundary layer symbols.namesake Fuel Technology Nuclear Energy and Engineering Flow (mathematics) symbols Supersonic speed business |
| Zdroj: | Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery. |
| Popis: | The demand for efficiency in today’s and in future civil aircraft is such that experimental studies alone do not suffice to optimize aircraft aerodynamics. In this context, much effort has been spent in the past decade to develop numerical methods capable of reproducing the phenomena that occur in the engine flow field. This paper presents some studies in Computational Fluid Dynamics related to supersonic inlets. Two approaches are considered. First, there is a need for code capable of calculating in a cost-efficient way the entire flow field around a 2D or 3D inlet, e.g. to perform parametric studies. To this effect, a computing method based on grid construction by mesh generator dedicated to inlet shapes and on the discretization of the unsteady Euler equations with an explicit upwind scheme was developed. The treatment of complex geometries led us to adopt a multiblock grid approach. Therefore particular attention was paid to the treatment of the boundary conditions between the different domains. Secondly, there is a need for code that can capture local phenomena in order to get a better understanding of inlet behaviour (shock/shock, shock/boundary layer interactions, etc.). To this effect a 2D turbulent Navier-Stokes code is used. The 2 equations k-ε turbulence model included in the program seems to be one of the most successful models for calculating flow realistically. Correction of the near-wall influence extends its capability to complex flow configurations, e.g. those with separated zones. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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