Fluid Machines/ Hydraulics

Fluid Pumps: Definition and Basics

Fluid Pump or Hydraulic Pump is a machine which transfers the energy from its moving parts to the fluid passing through the machine. The energy transferred from the Pump to the fluid appears as the pressure and velocity of the fluid. Know more about Fluid or Hydraulic Pumps in this article series.

Published by naveenagrawal (3264 pts) on Mar 18, 2009 to
Mechanical Engineering Articles
Cavitation in Hydraulic Turbines: Causes and Effects

Cavitation is formation of vapor bubbles in the liquid flowing through any Hydraulic Turbine. Cavitation occurs when the static pressure of the liquid falls below its vapor pressure. Cavitation is most likely to occur near the fast moving blades of the turbines and in the exit region of the turbines

Published by naveenagrawal (3264 pts) on Feb 27, 2009 to
Mechanical Engineering Articles
Hydraulic Turbines: Kaplan Turbine

Kaplan Turbine is designed for low water head applications. Kaplan Turbine has propeller like blades but works just reverse. Instead of displacing the water axially using shaft power and creating axial thrust, the axial force of water acts on the blades of Kaplan Turbine and generating shaft power.

Published by naveenagrawal (3264 pts) on Feb 27, 2009 to
Mechanical Engineering Articles

Hydraulic Turbines: Francis Turbine

In Francis Turbine water flow is radial into the turbine and exits the Turbine axially. Water pressure decreases as it passes through the turbine imparting reaction on the turbine blades making the turbine rotate. Read more about design and working principle of Francis Turbine in this article.

Published by naveenagrawal (3264 pts) on Feb 27, 2009 to
Mechanical Engineering Articles
Multiobjective CFD based Optimization - Part 2

Solving a CFD based multi-objective optimization problem is a computational time and resource consuming task. Efficiency is main issue here.Efficiency can be achieved by carefully choosing the optimization method preferring small population operating method and good geometrical modelling technique.

Published by burniadi (306 pts) on Dec 7, 2008 to
Mechanical Engineering Articles
Lubricant Properties for a Gearbox – Part 2

This article deals with the properties in a lubricant needed for the satisfactory performance of a gearbox. The various characteristics of the lubricant are discussed in detail here.

Published by kkaarthic (3396 pts) on Nov 30, 2008 to
Mechanical Engineering Articles

What is Surface Tension of the Fluid?

Surface tension is one of the most important and interesting properties of the fluids and it is applicable to the liquids only. The physical and chemical properties of the fluids cannot be understood without considering the surface tension of the fluid.

Published by Haresh Khemani (23472 pts) on Oct 14, 2008 to
Mechanical Engineering Articles
General and Thermodynamic Properties of the Fluids

After seeing the general properties of the fluid, let us see some thermodynamic properties of the fluids. The fluids are liquids and gases. The liquids are considered to be incompressible, but the gases are compressible, hence thermodynamics properties play major role for the gases fluids.

Published by Haresh Khemani (23472 pts) on Oct 14, 2008 to
Mechanical Engineering Articles
Types of Fluids in Mechanical Engineering

Based on how the property of viscosity of the fluid changes in various fluids, they are classified into five types, these are: ideal fluid, real fluid, Newtonian fluid, non-Newtonian fluid, and ideal plastic fluid. These have been described in more details as below:

Published by Haresh Khemani (23472 pts) on Oct 13, 2008 to
Mechanical Engineering Articles
Effect of Temperature on the Viscosity of the Fluid

Understanding the effect of temperature on the viscosity of the fluid is very important. As the temperature of the liquid fluid increases its viscosity decreases. In gases its opposite, the viscosity of the gases fluids increases as the temperature of the gas increases.

Published by Haresh Khemani (23472 pts) on Oct 13, 2008 to
Mechanical Engineering Articles