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)


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    Title :

    The Recirculation Flow Pattern of a VTOL Lifting Engine


    Contributors:

    Publication date :

    1973


    Size :

    201 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English