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Numerical Simulation and Parameter Design on Steam-powered Catapult

Author: ShenGuo
Tutor: ZhangXiaoBing
School: Nanjing University of Technology and Engineering
Course: Armament Launch Theory and Technology
Keywords: Steam catapult Interior Ballistics Two-phase flow Numerical Simulation Parameter design
CLC: TJ013.1
Type: Master's thesis
Year: 2010
Downloads: 243
Quote: 0
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Abstract


The steam catapults system carrier aircraft takeoff catapult device , and its role is to help the carrier aircraft quick to take off , shorten takeoff distance , improve operational response capability . Its interior ballistics process has an important effect on carrier-based aircraft ejection performance and emission security . In this paper, to the steam catapult system for the study , analysis of the physical processes of the steam catapult , and their mathematical modeling and numerical simulation analysis , and design of the steam catapult system parameters at the same time , the following major elements : (1) the establishment of steam ejection process zero-dimensional interior ballistics model , the preparation of a water vapor program used to calculate the physical parameters of water vapor , and coupled with the zero-dimensional interior ballistics program , using the fourth order Runge-Kutta method for numerical simulation and analysis of different factors on the steam catapult ballistic performance the impact . ( 2 ) to establish The steam catapult One Dimensional mathematical model using MacCormack difference scheme for the numerical simulation , and the use of shock tube classic example of the perfect gas expansion work to verify the correctness of the procedure and calculation accuracy , piston the variation with time of the velocity and displacement of the bottom of the pressure , carrier-based aircraft , as well as the the different moments cylinder pressure maps ; steam condensation in the cylinder , provide a theoretical basis for the prevention of condensation of steam . (3) the steam ejection process two-dimensional numerical simulation to study the emission cylinder pressure , velocity and flow field changes , as well as carrier-based aircraft velocity, displacement parameters variation over time , as the steam catapult system engineering the design provides a certain reference . ( 4 ) combined with a steam catapult ballistic process , design and analysis of the steam catapult parameters , and the steam supply system are analyzed and discussed .

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CLC: > Industrial Technology > Arms industry > General issues > Theoretical and Experimental > Rocket,missile ballistics > Interior ballistics
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