This blog will soon be associated with a new blog which will have a totally separate foundation....
It would be covering paranormal stuff touching theories and view on the un-explained happening around the world.
Just for an intro purpose it would cover stuff like...
Metaphysics >> Theories
Mysteries >> The unexplained Phenomenon
UFO
Astrology >> might be a bit bent towards astronomy in between as well
Pyramids..... and a whole lot more...
so stay in touch as I begin working on it.
Looking forward to your readership.
Wednesday, October 29, 2008
0
General Note
Monday, October 27, 2008
0
The basic principle of the Rockets functionality is Newton's third Law i.e. for every action there is an equal amount of reaction. Now some part of that opposite reaction is what takes the body upwards is say some cause there are huge amounts of losses. The detail analysis of thermodynamics going on at the launch time would yield loads of losses but I am not going into that for now lets keep it straight and simple.
The science of fuel that's good is that its nature friendly ... hydrogen is typically used in space shuttle launches. Hydrogen in the presence of Oxygen forms a combustible combination but the bad thing is that its hell expensive.
Space Shuttle [Rockets]:
The single most Important part of a Rockets structure is its nozzle. Its what converts the thermal energy from the propellant into kinetic energy which moves the rocket. Hence the nozzle is what moves the rocket so an efficiently designed nozzle can work wonders.
Here's a cap of the nozzle....
F= Thrust Force
= Mass Flow Rate
v[exit]=exhaust gas velocity at the nozzle exit
p[exit]= pressure of the exhaust gases at the nozzle exit
p[inf] = ambient pressure of the atmosphere
A[exit]= cross-sectional area of the nozzle exit
This is an over simplified diagram of a nozzle, whereas the reality is far far complex. In short just to develop understanding, the gases combust in the narrow area and then expand downwards. The thermodynamic forces are converted to thrust, this relationship according to the diagram can be expressed as under,
This equations generalizes the forces in the above diagrams and roughly predicts the amount of force created by a certain mass flow rate.
Whats happening in the industry nowadays:
Well fuel efficiency is being worked on, so that the same fuel can carry the furthest distance.
Improved ways of flying are being considered, even if it requires a complete redesign.
Here's a picture of what the Armadillo people have come up with.
Faster, as much as possible cause the distances in outer space are un-imaginable. Faster is whats required so that more exploration can be done in as little a period of time.
The most important of all is to make everything a whole lot safer .... the few incidents that rocked this industry need to be looked into more closely so that the future of space travel through rockets can be made a whole lot safe.
Rockets
This apparently would be an off topic post but all the same since this is a technology blog, everything falls into this category.
Rockets, from the Cold war down here to putting a man in orbit up there on the Moon [which is obviously controversial] ,have evolved making their mark from not only carrying stuff into outer space but also in weapons. Chinese fireworks laid the foundation to everything that we have put in space today.
Starting of with a brief history of how it all started, we go back to about the early nineteenth century to pay homage to Goddard, the father of modern day rockets. Other contributors did considerable work alongside him to bring to this industry to a stage where it is today.
Before moving of into any details of the flight dynamics lets first clear the basics by answering some key questions to help better understand these marvels of technology.
What is a Rocket?
Rockets are basically mechanisms/engines to provide high velocities to vehicles. Rockets use huge quantities of fuel to produce thrust which accelerates them so that by nowadays standards its able to break free from the earth gravitational pull [by achieving a speed higher then the earth's escape velocity] and enter space.
This is a j-2 rocket engine which is typical in space flights.
These are the common solid rocket boosters which have fuel tanks and during the flight these are dis-engaged after their fuels have been consumed. These are collected back at earth to be re-used in next missions.
What is a Missile?
A rocket if equipped/armed with any warhead becomes a missile .... below are two conventional forms of warheads used ...
Fuel Types:
Rockets Employ 3 main types of fuel ... namely
Solid Fuel
Liquid Fuel
Gaseous Fuel
Here's a comparison in the three main categories with their advantages and standoffs:
| Type | Advantages | Disadvantages |
| Solid fuel | simple, reliable, few moving parts, lots of thrust | not restartable |
| Liquid fuel | restartable, controllable, lots of thrust | complex |
| Gas fuel | restartable, controllable | low thrust |
The basic principle of the Rockets functionality is Newton's third Law i.e. for every action there is an equal amount of reaction. Now some part of that opposite reaction is what takes the body upwards is say some cause there are huge amounts of losses. The detail analysis of thermodynamics going on at the launch time would yield loads of losses but I am not going into that for now lets keep it straight and simple.
The science of fuel that's good is that its nature friendly ... hydrogen is typically used in space shuttle launches. Hydrogen in the presence of Oxygen forms a combustible combination but the bad thing is that its hell expensive.
Space Shuttle [Rockets]:
The single most Important part of a Rockets structure is its nozzle. Its what converts the thermal energy from the propellant into kinetic energy which moves the rocket. Hence the nozzle is what moves the rocket so an efficiently designed nozzle can work wonders.
Here's a cap of the nozzle....
F= Thrust Force
= Mass Flow Ratev[exit]=exhaust gas velocity at the nozzle exit
p[exit]= pressure of the exhaust gases at the nozzle exit
| |
This is an over simplified diagram of a nozzle, whereas the reality is far far complex. In short just to develop understanding, the gases combust in the narrow area and then expand downwards. The thermodynamic forces are converted to thrust, this relationship according to the diagram can be expressed as under,
This equations generalizes the forces in the above diagrams and roughly predicts the amount of force created by a certain mass flow rate.
Whats happening in the industry nowadays:
Well fuel efficiency is being worked on, so that the same fuel can carry the furthest distance.
Improved ways of flying are being considered, even if it requires a complete redesign.
Here's a picture of what the Armadillo people have come up with.
Faster, as much as possible cause the distances in outer space are un-imaginable. Faster is whats required so that more exploration can be done in as little a period of time.
The most important of all is to make everything a whole lot safer .... the few incidents that rocked this industry need to be looked into more closely so that the future of space travel through rockets can be made a whole lot safe.
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