JET ENGINE:

                            Jet Engineconsist of an air inlet, an air compressor, a combustion chamber, a gas turbine (that drives the air compressor) and a nozzle. The air is compressed into the chamber, heated and expanded by the fuel combustion and then allowed to expand out through the turbine into the nozzle where it is accelerated to high speed to provide propulsion.Turbojets are quite inefficient if flown below about Mach 2and very noisy. Most modern aircraft use turbofans instead for economic reasons. Turbojets are still very common in medium range cruise missiles, due to their high exhaust speed, low frontal area and relative simplicity.

 Propulsion

Fig  showing balloon with no escape path for the air inside.

 

Propulsion is the net force that results from unequal pressures.  Gas (air) under pressure in a sealed container exerts equal pressure on all surfaces of the container; therefore, all the forces are balanced and there are no forces to make the container move.

 

If there is a hole in the container, gas cannot push against that hole and thus the gas escapes.  While the air is escaping and there is still pressure inside the container, the side of the container opposite the hole has pressure against it.  Therefore, the net pressures are not balanced and there is a net force available to move the container.  This force is called thrust.

               The simplest example of the propulsion principle is an inflated balloon (container) where the stem is not closed off.  The pressure of the air inside the balloon exerts forces everywhere inside the balloon.  For every force, there is an opposite force, on the other side of the balloon, except on the surface of the balloon opposite the stem.  This surface has no opposing force since air is escaping out the stem.  This results in a net force that propels the balloon away from the stem.  The balloon is propelled by the air pushing on the front of the balloon.

JET ENGINE:

 

DEFINATION:

An engine that burns fuel and uses the expanding exhaust gases to turn a turbine and/or produce thrust.

 

TYPES OF JET ENGINE:

a.Turbojet

          b.Turbofan

          c.Turboshaft

          d. Ramjet

            e. Scramjet

 

ELECTROMAGANETIC CLUCH SYSTEM

                                 Electromagnet is one of the worlds most technologically sophisticated

 industries & is often viewed as a research test bed to stimulate innovation in orears of interest to the manufacturing / automotive industry.

Electromagnet Clutch system is the fore front of modern technology & required a substantial investment of knowledge.

                         Now a days , there is lot of competition in the market. So there is need of developing a new method or process for effective manufacturing .That process or methods should fulfill the requirement about accuracy productivity etc.

                                 It is necessary to reduce the total machine time & reduces its weight .There are various ways by which the total machining time can be effectively minimized .There are various time consuming steps or sab process .which can be minimize by various methods .

In mass production & at machine or at working time there is time criteria is very important within small time limit a single unit job has to be completed for minimizing the job time & complicated circuit or assembly the hunting of the job should minimum. So that energy will be consumed & labour time considerably saved .

Electromagnetic Clutch system i.c. it is partially or wholly divided in to two parts .means electromagnetic operation & Clutch ing system .Both operation are depends upon each other operation.

We have to basically introduce the attachment of these two system is used for stop the rotory motion of rotory motion or partially providing one shaft to another shaft. From a minimizing the handling time, or we introduce perforation of different work for that Electromagnetic brake system is defined .whole system is totally based on Raradays laws of electromagnet.

Firstly we introduce about electromagnet. Electromagnets name implies that “electro and magnet” means there is electrical energy & mechanical energy combination. It has his own characteristic due to which we have to adopt it. In the field of technology every day a new technique is ruled. It has some pros & cons. Today is the world of “ New technology “ which we have to take in practice electromagnetic principle is one of the oreas in the development. Electromagnet at this time is most widely used in robotics.

In the past the focus in the field of mechanical has been on precision seed & controllability more recently there has been on increasing interest in adoptive learning & anotnmy.

This has led to a new set of goods for this new kind of our project of course, one of the important goods remains the development of usual artifacts but it is no longer the major one more important is on increased understanding at the principles underlying intelligent behavious. A typical starting point is molding of some aspects of systems.

BlackBerry Z30 5-inch display, BB10.2 OS launched Rs. 39,990 in India

• BlackBerry has launched the Z30 for the Indian market at Rs. 39,990.BlackBerry has included 2GB of RAM onboard the Z30, apart from 16GB of inbuilt storage, which can be further expanded via microSD card (up to 64GB). The BlackBerry Z30 sports an 8-megapixel rear camera and a 2-megapixel front-facing camera.
• The new phablet runs BlackBerry 10 OS version 10.2, which includes refinements and new features when compared to the BlackBerry Z10 that was launched earlier this year. The Z30 includes a 2880mAh battery, which the company claims can deliver up to 25 hours of talktime - there is no word on standby time.

It is powered by a 1.7GHz dual-core Qualcomm Snapdragon S4 processor with Adreno 320 GPU.

Blackberry z30 Specification :

• 5-inch Super AMOLED display with 720x1280 pixels resolution
• 1.7GHz dual-core Qualcomm Snapdragon processor with Adreno 320
• 2GB of RAM
• 16GB of inbuilt storage, expandable up to 64GB via microSD card
• BlackBerry 10 OS version 10.2
• 8-megapixel rear camera
• 2-megapixel front-facing camera
• 2880mAh