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火星稀薄的大气使得探测器再入火星时难以获得足够的减速阻力,为此,文章提出利用磁阻尼增加阻力的概念。高速再入的探测器与火星大气剧烈摩擦产生等离子体,利用探测器上的磁偶极场将等离子体捕获,同时在火星大气中形成一个“磁泡”区域并跟随探测器。由“磁泡”束缚的等离子体与来流的中性气体发生碰撞获得动量,又通过磁场作用将动量传递给探测器,从而使探测器获得一定的减速阻力。在磁阻尼的作用下,在同样的开伞高度探测器速度可降至更低,而低速开伞又可提高阻力伞打开的可靠性。因此,磁阻尼不仅可加快降低再入速度,而且还有助于提高探测器着陆火星的安全性。
The thin atmosphere of Mars makes it difficult to obtain sufficient deceleration resistance when the detector reenters Mars. Therefore, the article proposes the concept of using magnetoresistance to increase resistance. The high-speed reentry detector flushes violently with the Martian atmosphere to create a plasma that uses the magnetic dipole field on the detector to capture the plasma while creating a “bubble” area in the Martian atmosphere and following the detector. The plasma confined by “bubble ” collides with the neutral gas in the incoming stream to obtain the momentum, which in turn transfers the momentum to the detector through the action of a magnetic field, thereby giving the detector a certain deceleration resistance. Under the effect of magnetic damping, the detector speed can be reduced to the same level at the same height of the parachute, and the low-speed parachute can improve the reliability of the parachute opening. Therefore, magnetically damped not only accelerates the re-entry speed, but also helps to improve the safety of the Mars landing on the detector.