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 are 90 degrees apart, but can be designed to work…
CAM Introduction
Cam - A mechanical device used to transmit motion to a follower by direct contact. Where Cam – driver member Follower - driven member. The cam and the follower have…
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 have come into engagement. It is desirable to have as…
Types of Welded Joints
There are five different types of welded joints for bringing two parts together for joining. Five types of welded joints are butt joint, corner joint, lap joint, tee-joint and edge joint. Tee…
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 uses of eddy current testing is for defect detection when…
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 moving blades. In Reaction Turbine, Fixed blades act as nozzles.…
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, as discussed below: Let d1 = Diameter of the driver, d2 =…
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 are made by mass production but in the very beginning…
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 chambers with account for the processes of heating and evaporation of droplets in those regimes typical of combustion chambers in which there is a substantial interphase exchange. It is clear that when a "cold" fuel is supplied into a "hot" air flow, the droplets are heated and the air surrounding them is cooled. It is evident that at small flow rates of the fuel this cooling can be neglected. The aim of this work is to answer two questions: how much the air flow is cooled by fuel in the range of parameters typical of real combustion chambers, and how far the region of flow cooling extends. Moreover, the dependence of the flow…
