Investigation of an asymmetric "penshape" exit having circular projections and discharging into quiescent air
An symmetric "penshape" exit was designed by the method of characteristics for a nozzle pressure of 15. This configuration was experimentally evaluated in quiescent-air tests over a range of pressure ratios from 4 to 16. In an attempt to achieve throat-area modulation, a scheme was also investigated wherein a teardrop-shape ramp moved out of the concave expansion surface to restrict the flow.
"An symmetric "penshape" exit was designed by the method of characteristics for a nozzle pressure of 15. This configuration was experimentally evaluated in quiescent-air tests over a range of pressure ratios from 4 to 16. In an attempt to achieve throat-area modulation, a scheme was also investigated wherein a teardrop-shape ramp moved out of the concave expansion surface to restrict the flow."
"An symmetric "penshape" exit was designed by the method of characteristics for a nozzle pressure of 15. This configuration was experimentally evaluated in quiescent-air tests over a range of pressure ratios from 4 to 16. In an attempt to achieve throat-area modulation, a scheme was also investigated wherein a teardrop-shape ramp moved out of the concave expansion surface to restrict the flow."@en
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United States. National Adviosry Committee for Aeronautics.
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United States. National Advisory Committee for Aeronautics.
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