Word: phenomenan
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...most significant results pro- duced by the apparatus is that a much clearer understanding of the flow phenomenan called "surge" has been gained. When air is sucked into the compressor of a jet engine, there are certain air speeds at which the whole air mass pulsates. "Surge is a disaster when it occurs," according to Richard Kronanuer, instructor in Applied Science and a researcher on the project. "When the air in the jet engine begins to pulsate, the pilot has only one choice: he must land or have his engine put out of commission...
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