| 释义 |
pressure jet
[f. pressure n. + jet n.3]
a. Used attrib. with reference to a type of oil burner in which the fuel is burned at a fine nozzle through which it is passed under pressure.
1911W. H. Booth Liquid Fuel xiii. 212 The pressure-jet system will recover from 70 per cent. to 75 per cent. of the theoretical calorific value of the oil fuel used in actual practice. 1920E. C. Bowden-Smith Oil Firing iv. 90 In the pressure-jet burner great care must be taken to maintain a high temperature, or the burner may fail entirely. 1968J. Slome Domestic Oil-Fired Central Heating iii. 61 Pressure jet burners can make quite a considerable amount of noise.
b. A small jet engine mounted at the tip of a helicopter rotor blade and supplied with compressed air through a duct in the blade. Freq. attrib.
1950Jrnl. Helicopter Assoc. Gt. Brit. III. 153 The pressure jet helicopter is..suitable for longer ranges. 1958Lambermont & Pirie Helicopters & Autogyros 201 The XV-1 has a reciprocating engine..which acts by feeding air through tubes to small pressure jets at the tips of the three-bladed rotor during vertical flight. |