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SEGUNDA PARTE:
DATOS :
• 𝑠 = 0,9
• 𝑃A = 500 kPa
• h = 4 𝑚
• 𝛾agua = 9,81 kN/m3
• 𝛾a𝑐𝑒𝑖𝑡𝑒 = (𝛾agua) 0,9
𝛾a𝑐𝑒𝑖𝑡𝑒 = 8,829 kN/m3
𝑃A man + (𝛾a𝑐𝑒𝑖𝑡𝑒) 4 m + (𝛾a𝑔𝑢𝑎) 4,5 m − (𝛾a𝑔𝑢𝑎) 4 m = 𝑃B man
500 kN/𝑚2 + (8,829 kN/m3) 4 m + (9,81 kN/m3) 4,5 m − (9,81 kN/m3) 4 m = 𝑃B man
540,221 kN/m3
= 𝑃B man
𝑃B man = 540,221 kPa
Pcamara ABS − 760 Torr = −60 Torr
Pcamara ABS = 700 Torr
101,3 kPa
760 Torr
= 93,3026 kPa
b.1)
• PAo man = PA ABS − P0 ABS
b.2)
PA ABS = PAo man + 101,3 kPa
PA ABS = 601,3 kPa
• PBo man = PB ABS − P0 ABS
PB ABS = 540,221kPa + 101,3 kPa
PB ABS = 641,521 kPa
 Presiones leídas por los manómetros
:
• PA man = PA ABS - Pcamara ABS
PA man = 507,997 kPa
• PB man = PB ABS - Pcamara ABS
PB man = 548,218 kPa
PA man = 601,3 kPa - 93,3026 kPa PB man = 641,521- 93,3026 kPa
PA ABS = 500 kPa + 101,3 kPa
PB ABS = PBo man + 101,3 kPa
𝐹𝑖𝑚𝑝𝑢𝑙𝑠𝑜 =
𝐼
𝑑𝜔
dt
𝑟
=
(𝐾2𝑚)
𝑑𝜔
dt
𝑟
.
𝑔
𝑔
=
(𝐾2𝑾)
𝑑𝜔
dt
𝑔.𝑟
 Ley de viscosidad de Newton:
𝜏 =
F
𝐴
= 𝜇
𝑉0
𝑒
F = 𝜇(2𝜋. 𝑟. 𝐿)
𝑉0
𝑒
F = 𝜇(2𝜋. 𝑟. 𝐿)
(𝜔𝑟)
𝑒
(𝐾2
𝑾)
𝑑𝜔
dt
𝑔. 𝑟
= 𝜇(2𝜋. 𝑟. 𝐿)
(𝜔𝑟)
𝑒
𝜇 =
𝑒. (𝐾2
𝑾)
𝑑𝜔
dt
2𝜋. 𝑟2. 𝐿. 𝜔 𝑔. 𝑟
𝜇 =
(0,05mm). (0,3m)2
(500 N) 1 RPM/s
2π. 0,01m 2(5cm)(600 RPM)(9,81 m/𝑠2). (0,01m)
𝜇 = 1.21678
N s
𝑚2 = 12.1678 𝑝𝑜𝑖𝑠𝑒
 𝐷𝑒 𝐼 𝑦 (𝐼𝐼):
….. (II)
….. (I)
 Viscosidad cinemática =
12.1678
g
cm.s
.
0,86
g
𝑐𝑚3
=14,149
𝑐𝑚2
𝑆
μ = 14,149 St=1414,9 cSt
I ∶ mometo de inercia
K: radio de giro
 Para un c𝑖𝑙𝑖𝑛𝑑𝑟𝑜 𝑑𝑒 𝑝𝑎𝑟𝑒𝑑 𝑑𝑒𝑙𝑔𝑎𝑑𝑎:
• F1 = 0,9 m 1,2 m 1000x(4,5 − 0,45) − 0,15x104 kg/m2
 Cálculo de las fuerzas que actúan sobre la
compuerta AB:
 D.C.L. de la compuerta 𝐀𝐁:
𝑦𝑃1 =
1,2(0,93)
12
2754
𝑥1000 =0,0265 m
F1 = 2754 kgf
F1
F2
F3
𝑅𝐵
• F2 = 0,9 m 1,2 m 1000x 4,5 − 0,15x104 + 1030x(0,45) kg/m2
𝑦𝑃2 =
1,2(0,93)
12
3740,58
𝑥1030 =0,02 m
F2 = 3740,58 kgf
• F3 = 1,8 m 1,2 m 3000x 1,5 + 750x(0,9) kg/m2
𝑦𝑃3 =
1,2(1,83)
12
11178
𝑥750 =0,0391 m
F3 = 11178 kgf
 Segunda condición de equilibrio: 𝑀𝐴 = 0
0,45 + 0,0265 2754 + 0,9 + 0,45 + 0,02 3740,58 − 0,9 + 0,0391 11178 + 1,8 𝑅𝐵 = 0
RB = 2255,769 kgf
9,81N
1 kgf
1 kN
1000 N
RB = 22,129 kN
Re =
𝜌.𝑣.𝐷
𝜇
=
𝜌.
4𝑄
𝜋𝐷2 𝐷
𝜇
=
4.𝜌.𝑄
𝜇.𝜋.𝐷
 Reemplazando valores:
Re =
4.(0,74)(1,205 kg/m3)(980 gal/min)
8x10−5 lb.s
pie2 .g.π.8"
Re =
4.(0,74)(1,205 kg/m3)(0.06182m3/s)
8x10−5 lb.s
pie2
1 kg
2,205 lb
1 pie
0,3048 m
2
.g.π.(0,2032 m)
Re = 90,166 (Flujo laminar)
Re =
4.(0,74)(1,205 kg/m3)(0.06182m3/s)
3,905x10−4 kg.s
m2 .(9,81m/𝑠2)π.(0,2032 m)

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Solución PC.pptx

  • 1. SEGUNDA PARTE: DATOS : • 𝑠 = 0,9 • 𝑃A = 500 kPa • h = 4 𝑚 • 𝛾agua = 9,81 kN/m3 • 𝛾a𝑐𝑒𝑖𝑡𝑒 = (𝛾agua) 0,9 𝛾a𝑐𝑒𝑖𝑡𝑒 = 8,829 kN/m3 𝑃A man + (𝛾a𝑐𝑒𝑖𝑡𝑒) 4 m + (𝛾a𝑔𝑢𝑎) 4,5 m − (𝛾a𝑔𝑢𝑎) 4 m = 𝑃B man 500 kN/𝑚2 + (8,829 kN/m3) 4 m + (9,81 kN/m3) 4,5 m − (9,81 kN/m3) 4 m = 𝑃B man 540,221 kN/m3 = 𝑃B man 𝑃B man = 540,221 kPa
  • 2. Pcamara ABS − 760 Torr = −60 Torr Pcamara ABS = 700 Torr 101,3 kPa 760 Torr = 93,3026 kPa b.1)
  • 3. • PAo man = PA ABS − P0 ABS b.2) PA ABS = PAo man + 101,3 kPa PA ABS = 601,3 kPa • PBo man = PB ABS − P0 ABS PB ABS = 540,221kPa + 101,3 kPa PB ABS = 641,521 kPa  Presiones leídas por los manómetros : • PA man = PA ABS - Pcamara ABS PA man = 507,997 kPa • PB man = PB ABS - Pcamara ABS PB man = 548,218 kPa PA man = 601,3 kPa - 93,3026 kPa PB man = 641,521- 93,3026 kPa PA ABS = 500 kPa + 101,3 kPa PB ABS = PBo man + 101,3 kPa
  • 4. 𝐹𝑖𝑚𝑝𝑢𝑙𝑠𝑜 = 𝐼 𝑑𝜔 dt 𝑟 = (𝐾2𝑚) 𝑑𝜔 dt 𝑟 . 𝑔 𝑔 = (𝐾2𝑾) 𝑑𝜔 dt 𝑔.𝑟  Ley de viscosidad de Newton: 𝜏 = F 𝐴 = 𝜇 𝑉0 𝑒 F = 𝜇(2𝜋. 𝑟. 𝐿) 𝑉0 𝑒 F = 𝜇(2𝜋. 𝑟. 𝐿) (𝜔𝑟) 𝑒 (𝐾2 𝑾) 𝑑𝜔 dt 𝑔. 𝑟 = 𝜇(2𝜋. 𝑟. 𝐿) (𝜔𝑟) 𝑒 𝜇 = 𝑒. (𝐾2 𝑾) 𝑑𝜔 dt 2𝜋. 𝑟2. 𝐿. 𝜔 𝑔. 𝑟 𝜇 = (0,05mm). (0,3m)2 (500 N) 1 RPM/s 2π. 0,01m 2(5cm)(600 RPM)(9,81 m/𝑠2). (0,01m) 𝜇 = 1.21678 N s 𝑚2 = 12.1678 𝑝𝑜𝑖𝑠𝑒  𝐷𝑒 𝐼 𝑦 (𝐼𝐼): ….. (II) ….. (I)  Viscosidad cinemática = 12.1678 g cm.s . 0,86 g 𝑐𝑚3 =14,149 𝑐𝑚2 𝑆 μ = 14,149 St=1414,9 cSt I ∶ mometo de inercia K: radio de giro  Para un c𝑖𝑙𝑖𝑛𝑑𝑟𝑜 𝑑𝑒 𝑝𝑎𝑟𝑒𝑑 𝑑𝑒𝑙𝑔𝑎𝑑𝑎:
  • 5. • F1 = 0,9 m 1,2 m 1000x(4,5 − 0,45) − 0,15x104 kg/m2  Cálculo de las fuerzas que actúan sobre la compuerta AB:  D.C.L. de la compuerta 𝐀𝐁: 𝑦𝑃1 = 1,2(0,93) 12 2754 𝑥1000 =0,0265 m F1 = 2754 kgf F1 F2 F3 𝑅𝐵
  • 6. • F2 = 0,9 m 1,2 m 1000x 4,5 − 0,15x104 + 1030x(0,45) kg/m2 𝑦𝑃2 = 1,2(0,93) 12 3740,58 𝑥1030 =0,02 m F2 = 3740,58 kgf • F3 = 1,8 m 1,2 m 3000x 1,5 + 750x(0,9) kg/m2 𝑦𝑃3 = 1,2(1,83) 12 11178 𝑥750 =0,0391 m F3 = 11178 kgf  Segunda condición de equilibrio: 𝑀𝐴 = 0 0,45 + 0,0265 2754 + 0,9 + 0,45 + 0,02 3740,58 − 0,9 + 0,0391 11178 + 1,8 𝑅𝐵 = 0 RB = 2255,769 kgf 9,81N 1 kgf 1 kN 1000 N RB = 22,129 kN
  • 7. Re = 𝜌.𝑣.𝐷 𝜇 = 𝜌. 4𝑄 𝜋𝐷2 𝐷 𝜇 = 4.𝜌.𝑄 𝜇.𝜋.𝐷  Reemplazando valores: Re = 4.(0,74)(1,205 kg/m3)(980 gal/min) 8x10−5 lb.s pie2 .g.π.8" Re = 4.(0,74)(1,205 kg/m3)(0.06182m3/s) 8x10−5 lb.s pie2 1 kg 2,205 lb 1 pie 0,3048 m 2 .g.π.(0,2032 m) Re = 90,166 (Flujo laminar) Re = 4.(0,74)(1,205 kg/m3)(0.06182m3/s) 3,905x10−4 kg.s m2 .(9,81m/𝑠2)π.(0,2032 m)