< Turns, S. R., An Introduction to Combustion,Concepts and Application, Mc Grant-Hill, 2000>

Chapter 8. Laminar Premixed Flames

8.1 (3), (4, 5), , (6, 7) , , : , , , 8.1 : cook top -

8.2 (flame) : .

(deflagration) :

(detonation):

8.2.1

8.2.2. VuSLStVbSbStSbSLa) b) 1

Vu . SL St . Sb St . S b St V b . Vu (b) 1 . (Laminar burning velocity) (flamespeed) SL= Vu sin .

1) SL 2) S b 3) - () () : 4) - 0.1~1mm5) , 6) < 7)

- : (8.1)

8.2.3

: Fig 8.3(a) ( ) Fig 8.3(b) - (8.2)

1 1) : Fig 8.4 2) : Fig 8.5(8.2)

8.6 x VU 1 . . - 0.4m/s .

8.1

) (8.2)

Fig 8.6

SL = 400mm/s

8.6 . : X-Z (dz/dx) z(x) x .

8.7

SL=400mm/s, A=800, B=20

8.6 z x . . ( 2 )

8.3 1) 2) : Spalding

8.3.1

1) 1, , 2) , , 3) , 4) Fourier Fick .

5) Lewis 1

. 6) . .7) 1 .8) .(8.3)

8.3.2

8.8 , , (7 )1)

2)

Fick ,(7.4a)(7.4b)(7. 9)

, , (7.8)

: (8.6a)

: (8.6b)

: (8.6c) (7.8)(8.5)

3) Shavb-Zeldovich : (7.47) (8.7a) (8.7b) (8.8)

8.3.3 1) ( )2) (8.7b) ( ) 1) (8.9a), (8.9b) 2) (8.9c), (8.9d)

- 8.9 TU Tb :

2 (8.7.b) 4 .

1) - (8.15)

2) - (8.17) (8.15)(8.17)

,

1) : (8.18)

2) : (8.19)

SL SL (8.20)

(8.21)

SL (8.21b)

8.4 8.4.1

T, (8.22) T, (8.23)

(8.24)

(8.25)

(8.24), (8.25) n=2, EA=1.67108J/kmol Tu=300K Tu=600K - SL 2.89 ( : table 5.1 30kcal/kmol=1.26108J/kmol ) -Table 8.1 .

-Andrews and Bradley

- 8.10 Tu=300K 600K - SL 3.3 ( 43.39cm 143.56cm 3.308) 2.89

8.4.2 (8.25) n=2 SL P (1) Andrews and Bradley

: P>5atm, CH4-air

(2) Rallis and Graforth( ) - CH4-air Group 1(8.27)

Group 2

(3) Law - 15 5atm

8.4.3 - 2.13 - 8.12 - 8.13

8.4.4 8.14 - , , ( - ) :

. 1. . 2. . 3. . 8.2 : Law

Meghalch Keck - , , =0.8~1.5, P=0.4~50 atm, T=298~700K

ref : 8.5 (8.28)

BM, B2, M : (Table 8.3)

: Ydil : - (EGR )

=0.8 - . i) : T=298K, P=1atm ii) : T=685K, P=18.38atm iii) 2 15%() ) Metghalch Keck (8.28) RMFD-303 . (indolene ) . i) 298K, 1atm

8.3 BM=27.58cm/s, B2=-78.34cm/s, M=1.13 8.3

ii) T=685K, P=18.38atm

= 2.18-0.8(0.8-1) = 2.34 = -0.16+0.22(0.8-1) = -0.204

iii) (1-2.1Ydil) .

: .12 . (pp. 423~454) . .