D B4D353 Pages: 2

Reg. No. Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, JUNE 2017

Course Code: CE206
Course Name: FLUID MECHANICS II (CE)

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any 2 questions. Each question carries 15 marks.

1. A Kaplan turbine working under a head of 20 m develops 11772 kW shaft power. The
outer diameter of the runner is 3.5 m and hub diameter 1.75 m. The guide blade angle at
the inlet at the extreme edge of the runner is 35°. The hydraulic and the overall efficiencies
of the turbines are 88% and 84% respectively. If the velocity of whirl is zero at the outlet,
determine:

a) Runner vane angles at the inlet and outlet at the extreme edge of the runner.

b) Speed of the turbine.

2. a. Show that the force exerted by a fluid jet in its direction of flow on a semicircular vane
is twice that exerted on a flat vertical plate, both plates being fixed in position. (9) b. What

are the different types of draft tubes? (6)

3. A centrifugal pump having outer diameter equal to two times the inner diameter and
running at 1000 rpm works against a total head of 35 m. The velocity of flow through the
impeller is constant and equal to 2.4 m/s. The vanes are set back at an angle of 40° at

outlet. If the outer diameter of the impeller is 500 mm and width at outlet is 50 mm,

determine:
i) Vane angle at inlet ii) Work done by impeller on
water per second, and iii) | Manometric efficiency.
PART ए
Answer any 2 questions. Each question carries 15 marks.
4. a. Derive Chezy’s equation for uniform flow in a channel section. (8)

b. For a constant specific energy of 2.4 N.m/N, calculate the maximum discharge that may

occur in a rectangular channel of 4.0 m wide. (7)

5. a. Explain the velocity distribution in an open channel. (5)

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