Viscous flowfields induced by three-dimensional lift jets in ground effect
Abstract
The turbulent flowfields associated with single and multiple jets impinging on a ground plane are relevant to the aerodynamics of VTOL aircraft in ground effect. These flowfields are computed using the Reynolds equations and a two-equation turbulence model to describe an isolated jet and two interacting jets with fountain formation. Coordinate transformations are employed to apply the boundary conditions for the governing equations in the far field, and a third-order-accurate upwind-difference scheme is used to discretize the resulting system. Flowfield properties calculated for these impinging-jet configurations are presented and compared with experimental data.
- Publication:
-
Final Technical Report
- Pub Date:
- January 1982
- Bibcode:
- 1982mcdd.rept.....B
- Keywords:
-
- Flow Distribution;
- Ground Effect (Aerodynamics);
- Jet Flow;
- Lift;
- Short Takeoff Aircraft;
- Turbulence;
- Vertical Takeoff Aircraft;
- Aerodynamics;
- Comparison;
- Computation;
- Coordinate Transformations;
- Finite Difference Theory;
- Mathematical Models;
- Turbulence Models;
- Viscosity;
- Fluid Mechanics and Heat Transfer