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An inward flow reaction turbine has an external diameter of 1 m and its breadth at inlet is 250 mm. If the velocity of flow at inlet is 2 m/s and 10% of the area of flow is blocked by blade thickness, the weight of water passing through the turbine will be nearly (a) 10 kN/s (b) 14 kN/s (c) 18 kN/s (d) 22 kN/s |
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Answer» (b) 14 kN/s d1 = 1 m b1 = 0.25 m VF1 = 2 m/s k = 0.9 = coefficient of blade thickness Q = k⋅πd1b1VF1 Q = 0.9 × π × 1 × 0.25 × 2 = 1.413 m3/sec Weight of water passing through turbine = ρgQ = 1000 × 9.81 × 1.413 = 14 kN/s |
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