PANEL.rar - Panel Code in MATLAB
Coded by L. sankar, April 1997
,2012-02-11 07:33:27,下载11次
oblique.rar - Interactive oblique shock calculator for a double
wedge.
References: John, J.E.A., "Gas Dynamics," 2nd Edition, 1984: pp 123-134.
Ames Research Staff, "Equations, Tables, and Charts for Compresssible Flow," NACA Report 1135, pp 8-12.
,2012-02-11 07:23:14,下载5次
nozzle_Ok.rar - In mathematics, the method of characteristics is a technique for solving partial differential equations. Typically, it applies to first-order equations, although more generally the method of characteristics is valid for any hyperbolic partial differential equation. The method is to reduce a partial differential equation to a family of ordinary differential equations along which the solution can be integrated from some initial data given on a suitable hypersurface.
This software is an example of implementation of characteristics method in a definition of convergent-divergent nozzle.
,2012-02-11 06:41:58,下载24次
Nyquist.rar - A Nyquist plot is a parametric plot of a transfer function used in automatic control and signal processing. The most common use of Nyquist plots is for assessing the stability of a system with feedback. In Cartesian coordinates, the real part of the transfer function is plotted on the X axis. The imaginary part is plotted on the Y axis. The frequency is swept as a parameter. Alternatively, in polar coordinates, the gain of the transfer function is plotted as the radial coordinate, while the phase of the transfer function is plotted as the angular coordinate. The Nyquist plot is named after Harry Nyquist, a former engineer at Bell Laboratories.
This software is a simple vba implementation destinated to the control students.
,2012-02-11 06:36:53,下载6次
Bode.rar - A Bode plot is a graph of the transfer function of a linear, time-invariant system versus frequency, plotted with a log-frequency axis, to show the system s frequency response. It is usually a combination of a Bode magnitude plot, expressing the magnitude of the frequency response gain, and a Bode phase plot, expressing the frequency response phase shift.,2012-02-11 06:32:22,下载3次
BlackBody.rar - A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.Black-body radiation is distributed in energy (or frequency) in a manner set by the temperature T. A black body in thermal equilibrium emits electromagnetic radiation called black-body radiation. The radiation is emitted according to Planck s law, meaning that it has a spectrum that is determined by the temperature alone (see figure at right), not by the body s shape or composition. Practical materials emit energy at a fraction of black-body energy levels called the emissivity of the surface. By definition, a black body in thermal equilibrium has an emissivity of ε = 1.0. A source with lower emissivity independent of frequency often is referred to as a gray body. Construction of black bodies with emissivity as close to one as possible remains a topic of current interest. This code can be used to simulate the black body radiation. ,2012-02-11 06:21:02,下载18次
Rocket_Design.rar - Rocket systems are presented in two broad classes: military rocket systems and research rocket systems. Military rocket systems are discussed in terms of their application in a battle environment. Research rocket systems are discussed in terms of the application to provide the means of placing data gathering equipment into a desired environment. Operational modes for the rocket systems are described. Finally, brief descriptions of the remaining chapters and the appendices are given.,2012-02-11 05:58:46,下载7次