1、 3 ISO 5167-3:2003Measurement of fluid flow by means of pressure differential devices inserted incircular cross-section conduits running full Part 3: Nozzles and Venturi nozzles(MOD) , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC)8.586.32005( 5167-3:2003)32006/33, - 1.09
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3、ozzles and Venturi nozzles) -, . - 1.52001 ( 3.6)5 31 2006 . 237- 8.586.32005 ( 5167-3:2003) . - . 3. . - 1 2007 .6 ( ) - . , -. - , 2007 -, II 8.586.320051 12 13 , , .24 .24.1 24.2 .25 .25.1 1932 25.2 75.3 .96 126.1 126.2 .136.3 196.4 196.5 .206.6 .20 () .21 27III 8.586.32005 8.586.1-2005 8.586.5-2
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5、tity bymeans of orifice instruments. Part 3. Nozzles and Venturi nozzles. Technical requirements 200701011 1932, , . 1932, . 8.568.1. 1932, , - 0,05 0,63 , - 10000.2 : 8.586.12005 ( 5167-1:2003) -. . 1. ( 5167-1:2003 , . 1. , D) 8.586.52005 . . 5. - 173782001 ( 3419:1981) - . . ( 3919:1981 , , D) 24
6、85681( 6552:1980) . - ( 6552:1980 . -, D) - - , 1 - , , . (), - () . , , , , .1 8.586.32005( 5167-3:2003) 3 , , , , - 8.586.1.4 4.1 4.1.1 , , 1932, , , - . -, . () , , , .4.1.2 qm=(c112d2/4) c101 (2c114c68p)0,5. (4.1) (4.1) 8.586.1 ( ). 3 , . . .4.1.3 , - , , qm= qvc114 = qcc114c. (4.2)4.2 (4.1) , ,
7、 . , - , Re, , . - . 8.586.1 ( ) 8.586.5 ( 8). - , , 8.586.5 ( 5).5 5.1 19325.1.1 1 1932 , . 1932, 1, - . , , . - .5.1.2 5.1.2.1 (. 1) :- , ;- , , B C;- E;- F, G -.5.1.2.2 1,5d D. d =2D/3 . d 2D/3 D. , D 1,5d, , , D (. 5.1.2.7 1).2 8.586.320055.1.2.3 d c163 2D/3. R1 (0,2 c177 0,02)d c98 0,65. c98c1001 :-1c163 ( c1001) c163 10 ;-1c163 c163 10 , ;-4c163c1001c163 10 , -. c1001 .
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