Atmospheric recluation – Wikipedia, free encyclopedia

Posted on by
before-content-x4

He re -entry o to atmospheric reentry It is the movement, from the outer space, of natural objects or made by humans, through the atmosphere of a planet. In the case of the Earth from an altitude above the “space limit”. When referring to atmospheric reentry often the controlled reentry process of vehicles that try to reach the surface of an intact planet is understood, but the concept also includes uncontrolled cases (or scarcely controlled), such as intentional or circumstantial events, the exorbitant destructive satellites and fall to the planet of “space scrap” due to orbital deterioration.

after-content-x4

Typical vehicles that are subjected to this process include those that return from orbit, in the case of spacecraft, and those in exo -orbital trajectories during suborbital flights, such as ICBM re-entry vehicles or some spacecraft. Normally this process requires special methods of protection against aerodynamic warming. Several advanced technologies have been developed to allow atmospheric reentry and flight at extreme speeds.

Thermal protection systems [ To edit ]

A thermal protection system or TPS is the barrier that protects a spacecraft during the abrasor heat from the atmospheric reentry. A secondary objective can be to protect the spacecraft against heat and the cold of space while it is in orbit. Multiple approaches for thermal protection of spacecraft are used, including ablative thermal shields, passive cooling and active cooling of spacecraft surfaces.

Pica-X [ To edit ]

An improved and easier version to produce PICA-X called was developed by Spacex in 2006-2010 for the “Dragon” space capsule. [ first ] The first reentry test of a PICA-X thermal shield was in the Dragon C1 mission on December 8, 2010. [ 2 ] The PICA-X thermal shield was designed, developed and fully qualified by a small team of only a dozen engineers and technicians in less than four years. Pica-X is ten times less expensive to manufacture than the thermal shield material of NASA Pica. [ 3 ] ​

The Dragon 1 spacecraft used PICA-X version 1 and was subsequently equipped with version 2. The Dragon V2 Use Pica-X Space Version 3. Spacex has indicated that each new version of Pica-X mainly improves the thermal armor capacity instead of the manufacturing cost.

Countries that have carried out successfully [ To edit ]

Credulated orbital resentment
Unmanned orbital re -entry

See also [ To edit ]

References [ To edit ]

  1. ↑ Dragon could visit space station next Archived on May 1, 2012 at Wayback Machine., msnbc.com , 2010-12-08, accessed 2010-12-09.
  2. ↑ Chambers, Andrew; Dan Rask (November 14, 2010). «NASA + SpaceX Work Together» . POT. Filed from the original April 16, 2011 . Retrieved on February 16, 2011 . ‘ SpaceX undertook the design and manufacture of the reentry heat shield; it brought speed and efficiency that allowed the heat shield to be designed, developed, and qualified in less than four years.’ ».
  3. ↑ Chaikin, Andrew (January 2012). «1 visionary + 3 launchers + 1,500 employees = ? : Is SpaceX changing the rocket equation?» . Air & Space Smithsonian . Retrieved on June 3, 2016 . ‘ SpaceX’s material, called PICA-X, is 1/10th as expensive than the original [NASA PICA material and is better], … a single PICA-X heat shield could withstand hundreds of returns from low Earth orbit; it can also handle the much higher energy reentries from the Moon or Mars. ».

after-content-x4