Y型过滤器、T型过滤器、篮式过滤器阻力损失计算
在对过滤器选型时，阻力损失是必须要确定的的数据，下面我教大家如何计算Y型过滤器、T型过滤器、篮式过滤器阻力损失(注：T型过滤器参照Y型等管件类过滤器，篮式过滤器参照筒壳类过滤器计算)。
Filter resistance loss
ΔP－阻力损失，Pa
ΔP－Resistance loss，Pa
λ－摩擦系数，无因次
λ－Friction coefficient,Dimensionless
Re－雷诺数，Re=(ω·dn)/u，无因次
Re－Reynolds number,Re=(ω·dn)/u,Dimensionless
ω－流体速度，m/s
ω－Fluid velocity,m/s
ρ－流体密度，kg/m³
ρ－Fluid density,kg/m³
μ－动力粘度，kg/m·s
μ－Dynamic viscosity,kg/m·s
u－运动粘度u=μ/ρ，m²/s
u－movement viscosity u=μ/ρ,m²/s
L－当量直管段长度，m，类管件过滤器查阅下表“类管件过滤器公称直径与当量直管段长度关系”
L－Equivalent ascending pipe segment size,m, Kind of fitting filter consult next table "Kind of fitting filter nominal diameter and equivalent ascending pipe segment size relations"
D－类管件过滤器内径，m
D－type filter tube diameter,m
dn－当量直径m，类管件过滤器取管件内径"D"，筒壳式过滤器取“4s/c”
dn－Equivalent diameter m ,The kind of fitting filter take the fitting inside diameter "D",The tube shell type filter take"4s/c"
S－液体流通面积，m²
S－Liquid flow area,m²
C－液体湿周（湿润周长），
C＝2X（筒体内径＋筒体高度）m C＝2X（筒体内径＋筒体高度）m
C－Liquid wetted perimeter(Moist perimeter)
C＝2X（cylinder diameter + cylinder height）m
ξ -入口阻力系数，取1.1
ξ - Entrance friction coefficient, Taking1.1
ξ -出口阻力系数，取0.5
ξ -Export friction coefficient, Taking0.5
类管件过滤器公称直径与当量直管段长度关系
| 公称直径DN(mm) Nominal diameter DN(mm) | 50 | 80 | 100 | 150 | 200 |
| 当量直管段长度L(×10³mm) Equivalent ascending pipe segment size L(×10³mm) | 25～30 | 18～23 | 15～20 | 22～38 | 32～40 |
| 公称直径DN(mm) Nominal diameter DN(mm) | 250 | 300 | 350 | 400 | 450 |
| 当量直管段长度L(×10³mm) Equivalent ascending pipe segment size L(×10³mm) | 27～43 | 58～65 | 48～85 | 60～95 | 62～98 |
Category filter tube nominal diameter and length of straight pipe equivalent relations
a.对于“Y型”等管件类过滤器，按下式计算
a.for the "Y-type" , such as tube-type filter, determined using the following equation:
b.对于“筒壳”类过滤器，按下式计算
b.for the "drum shell" type filters, determined using the following equation:
