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- W2047054583 abstract "Experiments on underexpanded cold jet flows from a convergent nozzle under simulated flight conditions have shown that a large periodic spinning motion of the jet can occur with greatly enhanced broadband noise production. Shadowgraph pictures indicate that this oscillatory jet motion accompanies the generation of random weak shock waves at the source. These waves appear to be generated at the point downstream of the nozzle exit where the shock cells in the jet begin to disappear. The weak shock waves propagate upstream and have been identified to be the cause of enhanced broadband jet noise production in flight. In addition, the results show that the boundary layer flow conditions over the outside of the primary nozzle (simulating engine cowl flow in flight) have a key role in the production of these random weak shock waves." @default.
- W2047054583 created "2016-06-24" @default.
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- W2047054583 date "1977-08-16" @default.
- W2047054583 modified "2023-10-01" @default.
- W2047054583 title "Effect of flight on jet noise from supersonic underexpanded flows" @default.
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- W2047054583 doi "https://doi.org/10.2514/6.1977-1328" @default.
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