| 释义 |
diffuser|dɪˈfjuːzə(r)|
[f. diffuse v. + -er1.]
1. One who or that which diffuses or spreads abroad.
a1679T. Goodwin Wks. V. i. 19 (R.) The Holy Ghost..being the author and diffuser of them into our hearts. 1681Manningham Disc. conc. Truth 32 (T.) Diffusers of secular learning. 1797W. Taylor in Monthly Rev XXII. 545 The diffusers, not the inventors, of their unprincipled principles. 1807Southey Espriella's Lett. III. 96 Women..become the most useful diffusers of their own faith. 1893Arena (Boston) Nov. 707 Promoter of purity, diffuser of sweetness and light.
2. a. spec. A contrivance for diffusing air, light, heat, etc.
1884Health Exhib. Catal. 114/1 Patent Inlets and Air Diffusers for Buildings. 1891Truth 10 Dec. 1242/1 The burners were shaded with the new bead ray diffusers. 1894Harper's Mag. July 216/2 Patents have been granted for ‘diffusers’, whereby the lightning is to be distributed over a larger area than, presumably, it could find unassisted.
b. Engin. A duct in a centrifugal pump, compressor, wind tunnel, etc., so shaped that it reduces the velocity of a fluid by increasing the cross-sectional area of flow.
1926W. J. Kearton Turbo-Blowers & Compressors vii. 186 The diffusers are of the ‘free vortex’ type, no guide vanes being fitted. 1946J. G. Keenan Gas Turbines & Jet Propulsion iv. 68 The diffuser is the name given to a ring of fixed guide vanes..surrounding the impeller. Ibid. 70 One object of the diffuser is to provide a smooth canalization of the flow from the impeller. 1959D. D. Wyatt in High-Speed Aerodyn. & Jet Propul. XII. E. §33. 350 The jet diffuser..consists of a divergent shroud attached to the outlet end of the jet nozzle. |