6.2 single pipes ariable Type I Tyi peⅡ ype Fluid Given Given Given pe Given Given Determine Flow Given DetermineGiven Pressure DetermineGiven Given
6.2 single pipes Variable Type Ⅰ Type Ⅱ Type Ⅲ Fluid Given Given Given Pipe Given Given Determine Flow Given Determine Given Pressure Determine Given Given
6.3 Hydraulic and energy g rade lines The concepts of hydraulic and energy grade lines are useful in analyzing more complex flow problems Head of pressure 2 Head of elevation Head of velocity Head of piezometric z++ 2 r 2g Head of energy
6.3 Hydraulic and energy grade lines • The concepts of hydraulic and energy grade lines are useful in analyzing more complex flow problems. 2 2 2 2 p z v g p z p v z g + + + --- Head of pressure --- Head of elevation --- Head of velocity --- Head of piezometric --- Head of energy
/Loss due to bends and friction in vertical section Energy grade line Negative pressure head because hydraulic grade 目 Hydraulic line is below pipe grade line Loss due to bends and fric: on in vertical section Energy grade Hydraulic and ne energy grade line 目2g 2g Re-entrant loss Ener 套写 grade line hydraulic H grade line Hydraulic grade line Hydraulic and energy grade lines for a system with pump and siphon
6.4 The siphon a closed conduit which lifts the liquid to an elevation higher than its free surface and the discharges it at a lower elevation is a siphon It has certain limitations in its performance due to the low pressure that occur near the summit
6.4 The siphon A closed conduit which lifts the liquid to an elevation higher than its free surface and the discharges it at a lower elevation is a siphon. It has certain limitations in its performance due to the low pressure that occur near the summit