| 释义 |
pressure tube
[f. pressure n. + tube n.]
1. A tube open at one or more points to a surrounding fluid whose velocity or pressure it is used to measure. Usu. attrib. in pressure tube anemometer.
1894Q. Jrnl. Meteorol. Soc. XX. 186 Lately he had spent a good many hours by the side of Mr. Dines's pressure tube anemometer, watching the action of the pen in squalls of wind. 1920G. Taylor Austral. Meteorol. viii. 77 The pressure and suction tubes..act together to move the float. 1970R. W. Longley Elements Meteorol. vii. 140 The record..came from a Dines pressure-tube anemometer which is able to measure rapid fluctuations in the wind.
2. A tube in which pressurized coolant or moderator is passed through the core in certain types of nuclear reactor.
1961J. K. Pickard et al. Power Reactor Technol. iv. 214 A graphite reflector can be used..which compensates for the loss of neutrons in the pressure tubes. 1968Moore & Holmes in Steam Generating & Other Heavy Water Reactors (Brit. Nuclear Energy Soc.) 3/2 One of the important features of a pressure tube reactor is that not only can different materials be used for the moderator and coolant, but the operating conditions of these media can be selected quite independently to suit their functions. |