A method is developed to predict theoretically the increase of temperature due to wind recirculation in the inlet of a VTOL aircraft lift engine exhausting normally to the ground. A method for calculating the velocities in the recirculation flow is presented. The laws of spread of buoyant plumes is used to calculate the temperatures within the recirculated flow. The three regions of the propulsion jet are identified as: (1) the free jet, (2) the wall jet, and (3) the zone of separation of the wall jet from the ground due to wind effects and buoyancy forces. (Author)
The Recirculation Flow Pattern of a VTOL Lifting Engine
1973
201 pages
Report
No indication
English
The Recirculation Flow Pattern of a VTOL Lift Engine
NTIS | 1972
|Scaling of VTOL recirculation effects
TIBKAT | 1970
|Scaling of VTOL recirculation effects
NTRS | 1970
|VTOL recirculation and impingement model testing
AIAA | 1973
|