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Three-dimensional modeling of an ideal nozzle for advanced propulsion.

机译：用于先进推进的理想喷嘴的三维建模。

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摘要

Advanced propulsion systems such as pulsed fission and fusion rockets hold the potential for opening up the solar system in ways few other propulsion technologies can. The University of Alabama in Huntsville is exploring one such concept in the form of pulsed z-pinch fusion propulsion. One of the technical hurdles to utilizing any pulsed fusion concept is the conversion from an isotropic expansion of a plasma into directed motion to produce thrust. This thesis investigates three dimensional modeling of pulsed nozzle performance in which the initial gas is a cylindrical gas column, emulating the initial conditions found in pulsed plasma discharges common in fusion experiments. Two nozzle geometries were investigated, a pusher plate and a hemispherical nozzle.;Simulations of these systems were conducted using SPFMax, a recently developed smoothed particle hydrodynamics code (SPH). The SPH method was chosen because it is naturally adaptive and accurate for resolving the vacuum/gas boundary which always exists in pulsed fusion systems. Argon plasma was used to compare the two systems to determine which offers better performance. The plasma was also subjected to a wide variety of shapes and initial conditions to determine what would offer higher performance for the two systems.
机译：诸如脉冲裂变和聚变火箭之类的先进推进系统具有以其他推进技术所无法企及的方式打开太阳系的潜力。位于汉斯维尔的阿拉巴马大学正在探索一种以脉冲Z轴聚变推进形式的概念。利用任何脉冲聚变概念的技术障碍之一是从等离子体的各向同性膨胀转换成定向运动以产生推力。本文研究了脉冲喷嘴性能的三维模型，其中初始气体为圆柱形气柱，模拟了聚变实验中常见的脉冲等离子体放电中发现的初始条件。研究了两个喷嘴的几何形状，即推板和半球形喷嘴。使用SPFMax（最近开发的平滑粒子流体动力学代码（SPH））对这些系统进行了模拟。选择SPH方法是因为它自然而然地适用于解决脉冲聚变系统中始终存在的真空/气体边界，并且准确无误。氩等离子体用于比较这两个系统，以确定哪种系统性能更好。等离子体还受到各种各样的形状和初始条件的影响，以确定哪些能为两个系统提供更高的性能。

著录项

  • 作者

    Schillo, Kevin.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Engineering Aerospace.
  • 学位 M.S.
  • 年度 2014
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TS97-4;
  • 关键词

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