| 释义 |
ramjet|ˈræmdʒɛt|
Also ram-jet, ram jet.
[f. ram v.1 + jet n.3; see also ram n.4 2.]
A simple form of jet engine in which the air used for combustion is compressed solely by the forward motion of the engine. Also attrib. and Comb.
1942in 29th Ann. Rep. U.S. Nat. Advisory Comm. Aeronaut. 1943 (1948) 407/2 An experimental investigation of an idealized ram-jet propulsion system was conducted in the..wind tunnel at the Langley Memorial Aeronautical Laboratory in March 1941. 1945Sci. News Let. 17 Nov. 317/3 A ramjet motor of new and unusual design. 1947Sun (Baltimore) 3 Sept. 20/7 He had been working on the development of the supersonic ram jet engine. 1948Times 2 Feb. 3/2 An aerial missile driven by a ‘ram-jet’ engine is reported, on its first flight over the desert at Inyokern, California, to have ‘far exceeded’ the speed of sound. 1955Sci. Amer. Jan. 38/2 Probably the simplest helicopter built so far is the Hiller Hornet. It is powered by ramjets, mounted in the tips of the rotor blades. 1957Jane's Fighting Ships 1957–58 439/3 The ramjet-propelled ‘Talos’ is capable of engaging both supersonic and subsonic targets. 1967M. Chandler Ceramics in Mod. World vi. 177 The ramjet engine..is little more than a plain tube with a very high-temperature fire inside it. 1974Encycl. Brit. Micropædia VIII. 407/2 Ramjets work best at speeds of Mach 2..and higher. 1977Times 5 Nov. 4/5 (caption) Five turbojet engines would power it from take-off until it reached 600 mph when five ramjet engines using liquid hydrogen fuel would take over. |