1 【標題】 水撃現象のパターン分類 - khk.gr.jp

1 1 Me-FL-NM051 ( ) ( ) 18 (WaterHammer) ( ) (UnsteadyState) (Transient Flow) (1) H (a/g) V H V a= g H ( ) ( ) L T 2L/a a 1200 /s L 800 2x800/1200 H (K 1) V2/2g(K ) H (a/g) V 10 1 /s 0 /s H 11x(12 02)/( ) H (1200 )x(1 0) ( ) 2 TS 89 1 TS TS 2 FE-06-IG-003 ( ) FE-06-IG-002 3 TS ( ) or ( 1) / (1)

2 / / ( ) 1 2 2 (2) / ( ) 4 U ( ) ( ) ( ) / 1 1 (a)(b) (1) (a) 2L/a (b) (c) , (c) (d) (2) (1) / T 2L/a Hu= (a/g) V Hd= (a/g) VJoukowsky T 2L/a Hu {K/2 (K K2/4) }Ho Hd {K/2 (K K2/4) }Ho H H Ho V Ve Vo K {LV /(gTHo)}2 V Vo Ve Hu ( ) Hd ( )H 1 ( ) Ho 1 ( )

3 Vo ( /s) Ve ( /s) T (s) L ( )( ) a ( /s) g ( /s2) H H H Ho H H 0 ( ) ( ) 5 T T ( ) ( 2) (1) (a) (b) (c) (a) ( ) 2 [ (2) ] (b)(c) (2) (3) ( ) [ ( ) ] [ ] ( ) ( ) ( ) ( ) 6 ( ) ( ) ( ) ( ) ( ) (3) (4) ( ) 100 3 99 ( )

4 2 1/3 Bv ( 10 ) 1 (4) ( )7 ( 3) ( (5) [ ] ( 4) (1) (6) 8 ( / ( ) ( ) 110 130 60 80 ( / ( ) ( ))))

5 ( 9 ( ) A1 A2 Ao,A1,A2 (7) ( ) (2) / / / 10 (a) ( dV /dt ) (b) / (8) (Slamming) Vmin Vmin ( ) (a) (b) ( ) ----- ( ) ----- ( dV /dt ) / / FE-06-IG-002 5 (9))

6 11 ( ) (10) ( ) H (a/g)Vo (a) (b) 1 (c) 12 ( ) ( ) (1) (Water Column Separation) /or ( ) ( ) / 6 7 13 , , / / 2 1 H H (a/ )(V1 V2)/2 ( ) a ( /s) V1,V2 ( /s) g ( /s2)

7 (2) 2 2 / / / ( ) (11) ( ) / (Condensation induced waterhammer) (12) ( ) 14 ( ) (13)(14)(1) 4 ( 2) 2 2 5 (2) ( ) 8 (a) ( ( ) ) (b) (c) (d) ( ( ) ) (a) / (b) (c) ( ) ( ) ( ) ( ) 15 9 (15)

8 [ ] ( ) / 16 Pmax. a{2 (Pe P) } Pmax. (Pa) a ( / 3) (-) Pe (Pa) P (Pa) [ ] (Pe P) 10 10 ( / / ) ( / ) ( / / ) / Pmax Pmax. a{2 Ps(L/Ls)} Pmax. (Pa) a ( / 3) Ps ( ) (Pa) L ( ) Ls ( ) ( 9) Pmax.

9 ( ) L Ls 17 (1) wave speed/propagation speed K [a (gK/ ) ] (1) a /[( /g){1/K (D/e)(c1/E)}] a ( /s) ( / 3) g ( /s2) K ( / 2) D ( ) e ( ) c1 (-) E ( f/ 2) 20 C a (gK / ) ( ) 1438 /s 150 / 6 (c1 1 ) a /[( ){1 ( )x( )}] 1/[ { 9 9}] 1306 / (2) ( / / ) / (a) (b) ( ) 18 (1) (2) ()