Fluid Coupling & Torque Converter

Distinguish between a fluid coupling and a torque converter. With neat sketch describe the working of a torque converter.

A Pelton wheel develops $6500 \text{ kW}$ at $200 \text{ rpm}$ under a head of $220 \text{ m}$ with an overall efficiency of $85$. Determine the unit speed, unit discharge and unit power, and the speed, discharge and power when the turbine is working under a head of $140 \text{ m}$.

Show from first principle that worked saved against friction in the delivery pipe of a double-acting reciprocating pump, by fitting air vessel is $39.2$.

A single acting reciprocating pump, running at $50\text{ rpm}$ delivers $0.01\text{ m}^3\text{/s}$ of water. The diameter of the piston is $200\text{ mm}$ and stroke length $400\text{ mm}$. Determine:

The theoretical discharge of the pump.

Co-efficient of discharge.

Slip and percentage slip of the pump.

What is the difference between a hydraulic coupling and a hydraulic torque converter?

Describe the working principle an axial flow multistage drum type compressor with neat sketch.

Write short notes on hydraulic torque converter with neat sketch.

What is surge in open channel flow? Describe the working principle of surge tank in hydro-electric power plant with neat sketch.