HVAC 6 min read
Heat Exchanger Designs
Calculations for heat exchanger designs use heat transfer parameters such as convection heat transfer coefficients, overall heat transfer coefficients, and…
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Material Science 2 min read
Non-Destructive testing (NDT)
NDT is the method of detection and measurement of properties or condition of materials, structures, machines without damaging or destroying their operational capabilities. Examples ofNDT are: magnetic dust method, penetrating liquid method, ultrasonic test and radiography. All NDTs are used to detect various types of flaws on the surface of material or internal inclusions of impurities and these techniques are also very useful during preventive maintenance and repair. There are few techniques which do not require any special apparatus and are quite simple to handle and only a moderate skill being required. Some of the applications of NDTs are detecting: (i) surface cracks (ii) material composition (iii) internal inclusions (iv) internal voids and discontinuities and (v) condition of internal stresses.
Theory of Machines 2 min read
Gears for connecting intersecting shafts
Bevel gears are useful when the direction ofa shaft’s rotation needs to be changed. They are usually mounted on shafts that…
Theory of Machines 2 min read
CAM Introduction
Cam – A mechanical device used to transmit motion to a follower by direct contact. Where Cam – driver member…
Theory of Machines 2 min read
Contact Ratio (or) Number of Pairs of Teeth in Contact
To assure continuous smooth tooth action, as one pair of teeth ceases action a succeeding pair of teeth must already…
Welding Processes 4 min read
Types of Welded Joints
There are five different types of welded joints for bringing two parts together for joining. Five types of welded joints…
Non Destructive Testing 3 min read
Present State of Eddy Current Inspection
Eddy current inspection is used in a variety of industries to find defects and make measurements. One of the primary…
Powerplant Engineering 2 min read
Comparison between Impulse and Reaction Steam Turbines
In Impulse Turbine, steam completely expands in the nozzle itself. Hence its pressure remains constant on both ends of the…
Theory of Machines 1 min read
Velocity Ratio of Belt Drive
It is the ratio between the velocities of the driver and the follower or driven. It may be expressed, mathematically,…
Vehicle Design Data Characteristics 10 min read
vehicle chassis and frame design
Automotive industry is one of the biggest and most innovative in total industry area. Almost all manufactured cars and vehicle…
Fuel Injection 11 min read
Introduction to The investigation of the mixture formation upon fuel injection into high-temperature gas flows
Combustion of a fuel in the combustion chambers of a gas-turbine engine and a gas-turbine plant is closely connected with the processes of mixing (Lefebvre, 1985). Investigations of these processes carried out by both experimental and computational methods have recently become especially crucial because of the necessity of solving ecological problems. One of the most pressing problems at present is account for the influence of droplets on an air flow. In some of the regimes of chamber operation this may lead to a substantial, almost twofold, change in the long range of a fuel spray and, consequently, to corresponding changes in the distributions of the concentrations of fuel phases. In this chapter physical models of the processes of interphase heat and mass transfer and computational techniques based on them are suggested. The present work is a continuation of research by Maiorova & Tretyakov, 2008. We set out to calculate the fields of air velocity and temperature as well as of the distribution of a liquid fuel in module combustion…