| 摘要 |
A gas turbine power plant includes an outer casing having an upstream end and a downstream end, a main air intake adjacent the upstream end and a gas outlet at the downstream end of said outer casing, first obturating means movable between an inoperative position wherein it is fully retracted so as not to interfere with a flow of air through said main air intake and an operative position wherein it extends partially to obturate the said main air intake, an auxiliary air intake defined in said outer casing, second obturating means movable between an operative and an inoperative position respectively to permit and to prevent ingress of air into said auxiliary air intake, and powered means for moving said first and second obturating means so that they are both in their respective operative positions substantially at the same time and in their respective inoperative positions substantially at the same time, and when in their operative positions increase the average velocity of the ingested air but to below Mach 1 under standard take-off and landing engine speeds.
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