# characteristics curves of a Pelton

Jun 16th, 2015
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To study the characteristics curves of a Pelton turbine operating at different flow rates with High Head & Low Head.Learning Outcome:Upon completion of experiment ,student should be to know understand the characteristics of Torque, Power output and Efficiency of Turbines at Different rotational speed of turbines at High Head & Low Head.

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Displacement - Time GraphIn a Displacement-Time Graph, the gradient of the graph is equal to the velocity of motion.Analysing Displacement - Time GraphGradient = 0Hence, velocity = 0Gradient is constant,hence, velocity is UniformGradient is negative and constant, hence velocity is uniform and in opposite directionGradient is increasing, hence velocity is increasing.Gradient is decreasing, hence velocity is decreasing.Velocity - Time GraphThe gradient of the velocity-time gradient gives a value of the changing rate in velocity, which is the acceleration of the object.The area below the velocity-time graph gives a value of the object's displacement.Analysing Velocity-Time GraphUniform velocityUniform accelerationIncreasing accelerationUniform decelerationDecreasing accelerationConverting a Velocity-Time graph to Acceleration-Time graphIn order to convert a velocity-time graph to acceleration time graph, we need to find the gradient of the velocity time graph and plot it in the acceleration-time graph.Force1. A force is push or pull exerted on an object.2. Force is a vector quantity that has magnitude and direction.3. The unit of force is Newton ( or kgms-2).Unbalanced Force/ Resultant Force When the forces acting on an object are not balanced, there must be a net force acting on it. The net force is known as the unbalanced force or the resultant force.When a force acts on an object, the effect can change the1. size,2. sh

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