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Volumetric Flow Rate,

`Q=25(m^(3))/(m)in`

; Working Fluid: Water at STP Impeller #I:

`\omega _(I)=3,000rpm;,`

Impeller #II:

`\omega _(II)=-3,000rpm`

Degree of Reaction: Impeller # I -

`R=0.50`

; Impeller # II:

`R=`

unknown GIVEN: Blade Tip Radius:

`95mm`

; Blade Hub Radius:

`37.5mm`

Assume flow is axial at BOTH Section 1 and at Section 4. Assume blade angles equal corresponding flow angles. Perform your calculations at the mean radius as defined in Peng (Pg. 45). FIND: Blade peripheral speed at mean radius for Impeller I,

`U_(I)`

. SECTION # 1 At Section #1, determine: Absolute Velocity,

`V_(1)`

, and Relative Velocity,

`W_(1)`

. Draw the Vector diagram of velocity vectors at Section #1, to scale. Determine the blade angle,

`\beta _(b1)`

on Impeller I. SECTION # 2 At Section #2, determine: Absolute Velocity,

`V_(2)`

, and Relative Velocity,

`W_(2)`

. Draw the Vector diagram of velocity vectors at Section #2, to scale. Determine the blade angle,

`\beta _(b2)`

on impeller #I. Determine the Power,

`P_(s1)`

, required for impeller #I. Determine the total Pressure rise from Sections 1 to 2. Sketch to scale (using drawing instruments) the blade on impeller # I. SECTION # 3 At Section #3, determine: Absolute Velocity,

`V_(3)`

, and Relative Velocity,

`W_(3)`

. Draw the Vector diagram of velocity vectors at Section #3, to scale. Determine the blade angle,

`\beta _(b3)`

on impeller # II. SECTION # 4 17.At Section #4, determine: Absolute Velocity,

`V_(4)`

, and Relative Velocity,

`W_(4)`

. Draw the Vector diagram of velocity vectors at Section #4, to scale. Determine the blade angle,

`\beta _(b4)`

on impeller # II. Sketch to scale (using protractor, etc.) the blade on Impeller # II. Determine the Power,

`P_(sII)`

, required for impeller # II. Determine the total Pressure rise from Sections 3 to 4. Determine the Degree of Reaction,

`R_(I)`

, of impeller # II. OVERALL: Determine the total Power,

`P_(s,TOTAL)`

in horsepower needed to operate the pump. Determine the total Pressure Rise,

`\Delta p|_(1-4)`

provided by the pump. Find the overall Degree of Reaction,

`R_(I+II)`

, accross both impellers. Sketch both blades side by side.