在對(duì)過(guò)濾器選型時(shí)，阻力損失是必須要確定的的數(shù)據(jù)，下面我教大家如何計(jì)算Y型過(guò)濾器、T型過(guò)濾器、籃式過(guò)濾器阻力損失(注：T型過(guò)濾器參照Y型等管件類過(guò)濾器，籃式過(guò)濾器參照筒殼類過(guò)濾器計(jì)算)。

Filter resistance loss

ΔP－阻力損失，Pa

ΔP－Resistance loss，Pa

λ－摩擦系數(shù)，無(wú)因次

λ－Friction coefficient,Dimensionless

Re－雷諾數(shù)，Re=(ω·dn)/u，無(wú)因次

Re－Reynolds number,Re=(ω·dn)/u,Dimensionless

ω－流體速度，m/s

ω－Fluid velocity,m/s

ρ－流體密度，kg/m3

ρ－Fluid density,kg/m3

μ－動(dòng)力粘度，kg/m·s

μ－Dynamic viscosity,kg/m·s

u－運(yùn)動(dòng)粘度u=μ/ρ，m2/s

u－movement viscosity u=μ/ρ,m2/s

L－當(dāng)量直管段長(zhǎng)度，m，類管件過(guò)濾器查閱下表“類管件過(guò)濾器公稱直徑與當(dāng)量直管段長(zhǎng)度關(guān)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－類管件過(guò)濾器內(nèi)徑，m

D－type filter tube diameter,m

dn－當(dāng)量直徑m，類管件過(guò)濾器取管件內(nèi)徑"D"，筒殼式過(guò)濾器取“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－液體流通面積，m2

S－Liquid flow area,m2

C－液體濕周（濕潤(rùn)周長(zhǎng)），

C＝2X（筒體內(nèi)徑＋筒體高度）m C＝2X（筒體內(nèi)徑＋筒體高度）m

C－Liquid wetted perimeter(Moist perimeter)

C＝2X（cylinder diameter + cylinder height）m

ξ -入口阻力系數(shù)，取1.1

ξ - Entrance friction coefficient, Taking1.1

ξ -出口阻力系數(shù)，取0.5

ξ -Export friction coefficient, Taking0.5

類管件過(guò)濾器公稱直徑與當(dāng)量直管段長(zhǎng)度關(guān)系

Category filter tube nominal diameter and length of straight pipe equivalent relations

a.對(duì)于“Y型”等管件類過(guò)濾器，按下式計(jì)算

a.for the "Y-type" , such as tube-type filter, determined using the following equation:

b.對(duì)于“筒殼”類過(guò)濾器，按下式計(jì)算

b.for the "drum shell" type filters, determined using the following equation: