煤量甏圆家重点实验宝 7) Attenuation of v S <067,Vm=Vo S >0.67,=f v (3-3) 2. Turbulent properties 1) In core region,y个↑,x个,vt↑ 2)in basic region, Vtmax >3 vt 3)vx>> Vaz,VX≈vy≈vz National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cn
NL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn 7) Attenuation of vm 0.67, ( ) 0.67, 0 0 0 0 0 r as f v v r as v v r as x m = = (3-3) 2. Turbulent properties 1) in core region, y↑, x↑, nt↑ 2) in basic region, ntmax > 3 nto 3) vx >> vy ≈vz , v’x ≈ v’y ≈ v’z
煤烧圆家重点实验宝 In core region f(2) 3-4 f2 b 4)mixing length l/b=0.11 /b=0.10 National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cn
NL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn In core region, ( ) ' ' ( ) ' ' 2 1 b y f v v b y f v v ym y xm x = = (3-4) 4) mixing length l tx/b = 0.11 l ty/b = 0.10 (3-5)
煤量甏圆家重点实验宝 3. Outer boundary and iso-velocity line In basic region b <0.y.∞ 2 ∝C1 db dy National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cn
NL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn 3. Outer boundary and iso-velocity line In basic region dy dv l dt db dy dv v l v v v v dy dv v dt db x t x x t y x y x x y ' 0, ' ' ( ' ' ) ' 2 2
煤量甏圆家重点实验宝 From the similarity of velocity const db Also dt COnSt of Coal Combustion. HUST COST Wuhan 430074 P.R. CHINA E-mail:pcbnlcc@hust.edu.cn
NL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn From the similarity of velocity m t t x m v dt db const b l b l b v dy dv = = = ... 1 2 Also, b const x const dx db dx db v dt db v dt dx dt dx dx db dt db m m = = = = = (3-6)
煤量甏圆家重点实验宝 For const b (3-7) const = const (3-8) const National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cn
NL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn For . . const v v const b y m x = = (3-7) i. e. . . const v v const x y m x = = (3-8)