Question

What is being addressed as flamelets

Answer 1

Answer:

Flamelet approach is applied for combustion modelling. Global one-step mechanism of methane is adopted. The temperature and species are computed in the mixture fraction space [15]. And the density of the mixture p(Z) can be calculated using the ideal gas relationship

ρ(z)=

P

R0T(Z)∑

Yi(Z)

Wi

where Ro is the universal gas constant and P is the pressure.

To determine the mean density of the hot flow, A presumed probability density function (PDF)

˜

p

(Z,x,t) is adopted and a standard β-function has been chosen

(13)

˜

P

(Z,x,t)=

Za−1(1−Z)β−1

∫

1

0

Zα−1(1−Z)β−1dz

(14)α=

˜

Z

(

˜

Z

(1−

˜

Z

)

˜

z″2

−1);β=(1−

˜

Z

)(

˜

Z

(1−

˜

Z

)

˜

z″2

−1