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Lectures on Numerical Methods in Bifurcation Problems
Methods for Finding Zeros in Polynomials
Lectures on Stochastic Flows and Applications
Educational Psychology by Edward L. Thorndike
The Last Days of Tolstoy by V. G. Chertkov
Globalization and Responsibility
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Linear Algebra: Theorems and Applications
Lectures on Stochastic Differential Equations and Malliavin Calculus
A Short Biographical Dictionary of English Literature
Lectures on Sieve Methods and Prime Number Theory
Dollars and Sense by William Crosbie Hunter
The Theory of the Theatre by Clayton Hamilton
The Mathematics of Investment
Occupiers of Wall Street: Losers or Game Changers
The Solution of the Pyramid Problem
Lectures on Moduli of Curves
Walden by Henry David Thoreau
Methods for Finding Zeros in Polynomials
Lectures on Stochastic Flows and Applications
Educational Psychology by Edward L. Thorndike
The Last Days of Tolstoy by V. G. Chertkov
Globalization and Responsibility
Lectures on Siegel Modular Forms and Representation by Quadratic Forms
Lectures on Topics In One-Parameter Bifurcation Problems
History of the Incas by Pedro Sarmiento de Gamboa
Linear Algebra: Theorems and Applications
Lectures on Stochastic Differential Equations and Malliavin Calculus
A Short Biographical Dictionary of English Literature
Lectures on Sieve Methods and Prime Number Theory
Dollars and Sense by William Crosbie Hunter
The Theory of the Theatre by Clayton Hamilton
The Mathematics of Investment
Occupiers of Wall Street: Losers or Game Changers
The Solution of the Pyramid Problem
Lectures on Moduli of Curves
Walden by Henry David Thoreau
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火箭推力偏心特性研究
Posted on 2010-04-28
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该文采用二维非定常特征线法对火箭喷管内二维非定常非对称流场进行了数值模拟,得到火箭侧向推力随时间的变化曲线.应用巴特勒提出的五面体双特征曲线网格法首先对喷管扩张段非定常非对称流场进行模拟,获得锥形喷管和双圆弧喷管侧向推力随时间的变化曲线.其次,对影响喷管推力偏心因素进行分析,并把该文计算定常状态下的结果和以往的数据进行对照,发现它们吻合的很好.最后,对整个喷管的亚、跨和超音速对称和非对称流场进行模拟,克服了三维定常特征线法不能求解亚、跨音速的缺陷.首次得到喷管侧向推力随压强和时间变化的曲线. 该文使用的数值模拟格式适用于不同形状的喷管或其它几何外形的物体,其格式对于模拟喷管内流场相对较为简单,体现了巴特勒提出的特征线法的优越性.计算结果表明,应用于的网格法是可行的和正确的.计算结果首次展示火箭侧向推力随时间(压强)的变化情况,也为微推偏喷管理论的研究提供一种手段.
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