pierderi de sarcina la conturi
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Intr-un circuit hidraulic sunt montate inevitabil coturi care creeaza un obstacol i
Aceste organe poarta numele de rezistente locale.
La trecerea peste aceste obstacole, lichidul pierde o parte din energia hidraulica
in care: - este coeficientul de rezistenta locala;
v viteza medie a fluidului in aval de obstacol.
p - caderea de presiune pe rezistenta
D - diametrul interior al rezistentei
Q - debitul volumic
hloc - pierderea de sarcina
- greutate specifica
g - acceleratia gravitationala
Vascozitatea cinematica, : 0.00005 m/s
Densitatea, : 1000 kg/m
Diam. int. D 0.021 m
Volum
colectat
[m]
Timp
[s]
Cot 45
Cot 90 0 0
0 0
0 0
0 0
0 0
Cot lung 0 0
0 0
0 0
0 0
0 0
Cot scurt 0 0
0 0
0 0
0 0
0 0
2
2v
p 23.1
2
4
D
Qv
0
0.1
0.2
0.3
0.4
0.50.6
0.7
0.8
0.9
1
0 0 0 0 0
Cot 45
Cot 90
Cot lung
Cot scurt
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n calea fluidului, opunindu-se trecerii acestuia.
inmagazinata, numita si cadere de presiune.
Date de intrare
Date calculate
Presiune
la intrare
[mH2O]
Presiune
la iesire
[mH2O]
Variatia
presiuniiDebit [m/s]
Viteza
fluidului
[m/s]
Pierderea locala
de
energie[mH2O]
Numarul
Reynolds
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4
2
Q
gDp
ppph
ocl
21
D.vRe
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Coef. de pierdere
hidraulica
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