What is characteristic curves of turbine?
What is characteristic curves of turbine?
Characteristic curves of a hydraulic turbine are the curves, with the help of which the exact behavior and performance of the turbine under different working conditions, can be known. These curves are plotted from the results of the tests performed on the turbine under different working conditions.
What are the characteristic curves of hydraulic turbines?
The hydraulic turbine characteristic curve is used to express the energy conversion, cavitation and other aspects of the hydraulic performance, force properties and other properties at the different operating conditions, these properties is the external characteristic of the internal flow of turbine, known as the …
What are the characteristics of turbine?
Turbine Characteristics
- Rotor. The turbine rotor shaft is manufactured in one piece, forged in Cr-Mo steel.
- Housing. The case of the turbine is merged in steel alloy.
- Regulating Valves.
- Emergency Shut Down Valve (ESV)
- Servo Motor.
- Safety and Control System.
- Journal Bearing.
- Sealing.
What is the significance of characteristic curves?
A curve plotted on a graph from two axes, exposure and density, used to describe the characteristics and performance of sensitive emulsions. A characteristic curve is a graph of the relationship between the amount of exposure given a film and it’s corresponding density after processing.
Which among the following are characteristics curves for centrifugal pump?
The characteristic curves of centrifugal pumps plot the course of the following parameters against flow rate (Q): head (H) (see H/Q curve), power input (P), pump efficiency (η) and NPSHr, i.e. the NPSH required by the pump.
What are the types of characteristic curves?
Pump characteristics curves can be classified into four groups: (i) Main characteristic curves, (ii) Operating characteristic curves, (iii) Constant efficiency curves, and (iv) Constant head and constant discharge curves.
What does characteristic shape mean?
n. 1 a distinguishing quality, attribute, or trait. 2 (Maths)
What are the characteristic curves?
A characteristic curve is a graph of the relationship between the amount of exposure given a film and it’s corresponding density after processing. The shape of the curve represents the tonal response of the film to a wide range of exposures and to one particular processing condition.
What are turbine curves?
Introduction 1 These are curves which are characteristic of a particular turbine which helps in studying the performance of the turbine under various conditions. 2 These curves pertaining to any turbine are supplied by its manufacturers based on actual tests. 3 The data that must be obtained obtained in testing a turbine are the following:
What are constant speed characteristics of a turbine?
Constant speed characteristics: In order to obtain these curves the tests are performed on the turbine by operating them at constant speed. These curves show the efficiency of the turbine for all conditions of running and hence these are also known as universal characteristic curves.
What are the different types of characteristic curves in physics?
3. • The characteristic curves obtained are the following: • a) Constant head curves or main characteristic curves • b) Constant speed curves or operating characteristic curves • c) Constant efficiency curves or Muschel curves 4.
What are the characteristics of Francis turbine?
Introduction Francis Turbine Kaplan Turbine Normal range of head:30-550m Normal range of head:1.5-80m Number of vanes:15-25 Number of vanes:3-8 Specific speed:50-250 60-400 Specific speed:300-1000 Cavitation susceptibility Greater cavitation susceptibility