Basics
Thermodynamic Processes of Perfect Gases
The process of heating or cooling of a gas is defined as a thermodynamic process. It has been observed that during a thermodynamic process, change takes place in various properties of the gas such as pressure, volume, temperature, specific energy, specific enthalpy etc. The following thermodynamic processes are important: 1. Constant volume process or isochoric process2. Constant…
Why compression ratio of petrol engine is kept low compared to diesel engine?
What is the need of high compression ratio? Today every machine is expected to give higher efficiency. When we talk about petrol engine and diesel engine whose thermal efficiency is directly related to ‘compression ratio’. That means if we want to achieve higher thermal performance in terms of efficiency, we should provide high compression ratio…
What Is Mechanical Engineering?
Technically, mechanical engineering is the application of the principles and problem-solving techniques of engineering from design to manufacturing to the marketplace for any object. Mechanical engineers analyze their work using the principles of motion, energy, and force — ensuring that designs function safely, efficiently, and reliably, all at a competitive cost. Mechanical engineers make a difference. That’s…
Super chargers
Super charger acts as an air compressor. It is used to increase the density and pressure of the air that is supplied to the internal combustion engine. In the engine, during the intake of the cycle it takes more oxygen and burn more fuel to accomplish the work. This is due the power increase. By…
Types of Loads
Different types of loads in engineering mechanics are compression, tension, torsion and bending. Compression: Compression loading is an effect in which the component reduces it size. During compression load there is reduction in volume and increase in density of a component. Tension: Tension is the act of stretching rod, bar, spring, wire, cable etc. that is being…
Theoretical or Minimum Air Required for Complete Combustion
The theoretical or minimum mass (or volume) of oxygen required for complete combustion of 1 kg of fuel may be calculated from the chemical analysis of the fuel. In order to obtain maximum amount of heat from a fuel, the adequate supply of oxygen is very essential for the complete combustion of a fuel. Now…
Types of Mechanical Forces
A force exerted on a body can cause a change in either the shape or the motion of the body. The unit of force in SI system is the newton (N) and CGS system is dyne. No solid body is perfectly rigid and when forces are applied to it, changes in dimensions occur. Such changes are not always…
Types of Fuel Cells
The different types of fuel cells include Alkaline Fuel Cell, Direct Methanol Fuel Cell, Proton Exchange Membrane Fuel Cell, Phosphoric Acid Fuel Cell, Solid Oxide Fuel Cell, and Molten Carbonate Fuel Cell. Type of Fuel Cell Operating Temperature (˚C) Fuel Electrolyte Alkaline Fuel Cell (AFC) 40 to 200 Hydrogen KOH Direct Methanol Fuel Cell (DMFC)…
What is Machine Design?
Mechanical Design or Machine Design is the branch of Engineering Design. Machine design can lead to the formation of the entirely new machine or it can lead to improvement of the existing machine. ● To understand what exactly machine design or mechanical design is let us consider the example of the gear box of the car….
Types of fluids
Fluids are divided into five types they are: Ideal fluids Real fluids Newtonian fluids Non-Newtonian fluids Ideal plastic fluids Ideal Fluids: An ideal fluid is defined as a fluid which is in-compressible and the one that does not have viscosity. Ideal fluids are imaginary fluids. This exist some viscosity. Real Fluids: A real fluid is…