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slurry transportation°ü·Ã Áú¹®ÀÔ´Ï´Ù.
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akaH
°íÀ¯ID
: bluerer
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: 07-11-13 10:24
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ȸ»ç ÀÚ·á½Ç¿¡ ¸»¾¸ÇϽŠNayyar's piping handbookÀÌ ÀÖ±ä Çѵ¥, ÇöÀç ´ëÃâÁßÀ̳׿ä.
¾ð±ÞÇϽŠ½½·¯¸®¿¡¼ÀÇ ¸¶Âû°è¼ö¸¦ °è»êÇÏ´Â ½ÄÀ» ¾Ë·ÁÁÖ½Ã¸é ´õ¿í µµ¿ò µÉ°Í°°½À´Ï´Ù.
µ¡±ÛÀº º¸±â ½±Áö ¾ÊÀ»°Í °°¾Æ ÀÌ·¸°Ô ¿Ã¸³´Ï´Ù.
½ºÅ×Æijë
Stefano
07-11-13 16:44
(1) Viscosity of Slurry
(¥ì)slurry = (¥ì)liquid * {1+ 2.5 Cv + 10.05 Cv^2 + 0.00273 exp(16.6Cv) }........(1)
Cv=Volume Fraction of Solids in slurry = (Solid Volume)/(Liquid Volume+Solid Volume)
= (Ws/¥ñs)/{(Ws/¥ñs)+(Wl/¥ñl)} ....................................................................(2)
Ws, Wl = Solid, Liquid ¹«°Ô; ¥ñs, ¥ñl =Solid, LiquidÀÇ ¹Ðµµ
À§ÀÇ ¼ö½ÄÀ» ÀÌ¿ëÇؼ ½½·¯¸®ÀÇ Æò±ÕÁ¡µµ¸¦ °è»êÇÏ°í ½ÇÃøÄ¡¿Í ¸Â´ÂÁö Á¡°ËÇØ º¸´Â °ÍÀÌ ¹«¾ùº¸´Ù Áß¿äÇÕ´Ï´Ù.
½ÇÃøÄ¡°¡ ¸ÂÁö ¾Ê´Â °æ¿ì ´Ù¸¥ ¸ðµ¨ ¼ö½ÄÀ» ÀÌ¿ëÇØ¾ß ÇÕ´Ï´Ù.
(2) Friction Factor
Friction Factor¸¦ ±¸ÇÏ·Á¸é Reynolds No.¸¦ ¾Ë¾Æ¾ß ÇÕ´Ï´Ù.
Re = (Æò±Õ¹Ðµµ)*(°ü³»°æ)*(°ü³» À¯¼Ó)/(Æò±ÕÁ¡µµ).........................(3)
(Fanning's) Friction Factor´Â Laminar FlowÀÎ °æ¿ì¿Í Turbulene FlowÀÎ °æ¿ì·Î ³ª´©¾î °è»êÇؾßÇÕ´Ï´Ù.
¸¸ÀÏ À¯Ã¼°¡ Newtonian Fluid(Áï Shear Stress°¡ Shear Rate(Velocity Gradient) ¿¡ ºñ·ÊÇÏ´Â À¯Ã¼)°¡ ¾Æ´Ñ °æ¿ì
Headstrom No¶ó´Â ÁöÇ¥¸¦ °è»êÇؼ º¸Á¤ÇØ ÁÖ¾î¾ß ÇÕ´Ï´Ù. (À̺κÐÀº Âü°í¼ÀûÀ» ã¾Æº¸¼¼¿ä) ±×·¸Áö ¾ÊÀº °æ¿ì
È¥ÇÕ¹°ÀÇ ¹Ðµµ¿Í Á¡µµ¸¦ Àû¿ëÇؼ ÀÏ¹Ý À¯Ã¼¿Í °°Àº ¹æ¹ýÀ¸·Î °è»êÇÏ¸é µË´Ï´Ù .
Laminar FlowÀÎ °æ¿ì f =16/Re----------------------------------------------------(4)
Turbulent FlowÀÎ °æ¿ì f = function of (Re)...>µµÇ¥ÀÌ¿ë Çϰųª ´ÙÀ½ÀÇ Colebrook EquationÀ» ÀÌ¿ëÇؼ ±¸ÇÔ
1/(f^1/2) = 4 log(D/2e) +3.48 -4 log [ 1 + 9.35D/{2e Re(f^1/2)}]....(5)
ÀÌ ¼ö½ÄÀ» ¼ÕÀ¸·Î Ç®±â´Â ¾î·Æ½À´Ï´Ù. ÀÌ °Ô½ÃÆÇ¿¡¼ "friction factor"¶ó´Â Å°¿öµå·Î ãÀ¸¸é ÀÚ¼¼ÇÑ ¼³¸íÀ» º¼ ¼ö ÀÖ½À´Ï´Ù.
Bingham Plastic, Pseudo Plastic FluidÀÎ °æ¿ì¿¡´Â º¸´Ù º¹ÀâÇÑ ¼ö½ÄÀ» »ç¿ëµÇ¾î¾ß ÇÕ´Ï´Ù. (ÀÌ·± °æ¿ì Ãßõ ¼ÀûÀ» Âü°íÇϼ¼¿ä)
(3) ¹è°ü ¾Ð·Â ¼Õ½Ç
Press Loss of Slurry Piping = 4 f (Equivalent Length/Pipe ID) * (Density) * (V^2/2)....(6)
SI Unit¸¦ »ç¿ëÇϸé Pascal ´ÜÀ§ÀÇ ¾Ð·Â¼Õ½ÇÀÌ ¾ò¾îÁý´Ï´Ù .
(1) Viscosity of Slurry (¥ì)slurry = (¥ì)liquid * {1+ 2.5 Cv + 10.05 Cv^2 + 0.00273 exp(16.6Cv) }........(1) Cv=Volume Fraction of Solids in slurry = (Solid Volume)/(Liquid Volume+Solid Volume) = (Ws/¥ñs)/{(Ws/¥ñs)+(Wl/¥ñl)} ....................................................................(2) Ws, Wl = Solid, Liquid ¹«°Ô; ¥ñs, ¥ñl =Solid, LiquidÀÇ ¹Ðµµ À§ÀÇ ¼ö½ÄÀ» ÀÌ¿ëÇؼ ½½·¯¸®ÀÇ Æò±ÕÁ¡µµ¸¦ °è»êÇÏ°í ½ÇÃøÄ¡¿Í ¸Â´ÂÁö Á¡°ËÇØ º¸´Â °ÍÀÌ ¹«¾ùº¸´Ù Áß¿äÇÕ´Ï´Ù. ½ÇÃøÄ¡°¡ ¸ÂÁö ¾Ê´Â °æ¿ì ´Ù¸¥ ¸ðµ¨ ¼ö½ÄÀ» ÀÌ¿ëÇØ¾ß ÇÕ´Ï´Ù. (2) Friction Factor Friction Factor¸¦ ±¸ÇÏ·Á¸é Reynolds No.¸¦ ¾Ë¾Æ¾ß ÇÕ´Ï´Ù. Re = (Æò±Õ¹Ðµµ)*(°ü³»°æ)*(°ü³» À¯¼Ó)/(Æò±ÕÁ¡µµ).........................(3) (Fanning's) Friction Factor´Â Laminar FlowÀÎ °æ¿ì¿Í Turbulene FlowÀÎ °æ¿ì·Î ³ª´©¾î °è»êÇؾßÇÕ´Ï´Ù. ¸¸ÀÏ À¯Ã¼°¡ Newtonian Fluid(Áï Shear Stress°¡ Shear Rate(Velocity Gradient) ¿¡ ºñ·ÊÇÏ´Â À¯Ã¼)°¡ ¾Æ´Ñ °æ¿ì Headstrom No¶ó´Â ÁöÇ¥¸¦ °è»êÇؼ º¸Á¤ÇØ ÁÖ¾î¾ß ÇÕ´Ï´Ù. (À̺κÐÀº Âü°í¼ÀûÀ» ã¾Æº¸¼¼¿ä) ±×·¸Áö ¾ÊÀº °æ¿ì È¥ÇÕ¹°ÀÇ ¹Ðµµ¿Í Á¡µµ¸¦ Àû¿ëÇؼ ÀÏ¹Ý À¯Ã¼¿Í °°Àº ¹æ¹ýÀ¸·Î °è»êÇÏ¸é µË´Ï´Ù . Laminar FlowÀÎ °æ¿ì f =16/Re----------------------------------------------------(4) Turbulent FlowÀÎ °æ¿ì f = function of (Re)...>µµÇ¥ÀÌ¿ë Çϰųª ´ÙÀ½ÀÇ Colebrook EquationÀ» ÀÌ¿ëÇؼ ±¸ÇÔ 1/(f^1/2) = 4 log(D/2e) +3.48 -4 log [ 1 + 9.35D/{2e Re(f^1/2)}]....(5) ÀÌ ¼ö½ÄÀ» ¼ÕÀ¸·Î Ç®±â´Â ¾î·Æ½À´Ï´Ù. ÀÌ °Ô½ÃÆÇ¿¡¼ "friction factor"¶ó´Â Å°¿öµå·Î ãÀ¸¸é ÀÚ¼¼ÇÑ ¼³¸íÀ» º¼ ¼ö ÀÖ½À´Ï´Ù. Bingham Plastic, Pseudo Plastic FluidÀÎ °æ¿ì¿¡´Â º¸´Ù º¹ÀâÇÑ ¼ö½ÄÀ» »ç¿ëµÇ¾î¾ß ÇÕ´Ï´Ù. (ÀÌ·± °æ¿ì Ãßõ ¼ÀûÀ» Âü°íÇϼ¼¿ä) (3) ¹è°ü ¾Ð·Â ¼Õ½Ç Press Loss of Slurry Piping = 4 f (Equivalent Length/Pipe ID) * (Density) * (V^2/2)....(6) SI Unit¸¦ »ç¿ëÇϸé Pascal ´ÜÀ§ÀÇ ¾Ð·Â¼Õ½ÇÀÌ ¾ò¾îÁý´Ï´Ù .
akaH
bluerer
07-11-19 14:56
Friction Factor¿¡ ´ëÇÑ ¼³¸íÀº ´ÙÇàÈ÷ Á¦°¡ ÀÌ¹Ì ´Ù ¾Ë°í ÀÖ´Â ºÎºÐÀ̾ú½À´Ï´Ù.
SlurryÀÇ °æ¿ì Friction Factor¸¦ °è»êÇÏ´Â ´Ù¸¥ ¼ö½ÄÀÌ ÀÖ´ÂÁÙ ¾Ë°í ¿©ÂåºÃ½À´Ï´Ù^-^;;
Àü¹ÝÀûÀ¸·Î ¸¹Àº°ÍÀ» »õ·Ó°Ô ¾Ë°Ô µÇ¾ú°í, ½ºÅ×Æijë´ÔÀÇ µµ¿ò¿¡µµ °¨»çµå¸³´Ï´Ù.
Friction Factor¿¡ ´ëÇÑ ¼³¸íÀº ´ÙÇàÈ÷ Á¦°¡ ÀÌ¹Ì ´Ù ¾Ë°í ÀÖ´Â ºÎºÐÀ̾ú½À´Ï´Ù. SlurryÀÇ °æ¿ì Friction Factor¸¦ °è»êÇÏ´Â ´Ù¸¥ ¼ö½ÄÀÌ ÀÖ´ÂÁÙ ¾Ë°í ¿©ÂåºÃ½À´Ï´Ù^-^;; Àü¹ÝÀûÀ¸·Î ¸¹Àº°ÍÀ» »õ·Ó°Ô ¾Ë°Ô µÇ¾ú°í, ½ºÅ×Æijë´ÔÀÇ µµ¿ò¿¡µµ °¨»çµå¸³´Ï´Ù.
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