内弹道分散颗粒模型及数值计算

介绍了一种新型的内弹道两相流模型－分散颗粒模型。用欧拉法描述火药燃气流场，用拉格朗日法描述火药颗粒，分别跟踪所有的火药颗粒，考虑它们在流场中位置、速度、质量的变化，两相之间各种参量的耦合反映在各守恒方程的源项中。采用单元内颗粒源法对该模型进行了数值计算，成功地预测了膛内流场的细节和火药颗粒的运动规律。     

轴对称两维颗粒轨道模型

建立了火药颗粒运动的两维颗粒轨道模型，用欧拉法这气相场，用拉格朗日法描述固相颗粒，并采用单元内颗粒源方法，对某中心点火结构３０ｍｍ火炮的点传火过程进行了数值模拟。     

高装填密度火药颗粒床燃烧转爆轰的数值分析

建立了描述一种高装填密度火药颗粒床燃烧转爆轰（DDT）的反应两相流模型，用Mao Cormack有限差分格式求解了控制方程，数值分析揭示了这种火药床DDT过程的一些重要特征，还分析了各种因素对DDT过程的影响。     

考虑湍流影响的内弹道离散粒子模型

以往的内弹道两相流模型都是在欧拉法基础上建立的。为了避免火药床粒子云假设的误差,本文将欧拉法与拉格朗日法结合起来,建立起一种新的火炮内弹道模型——离散粒子模型,同时在气相场中考虑湍流的影响。文中还简单介绍了一种新的算法——单元内颗粒源法。     

考虑湍流影响的内弹道离散粒子模型

以往的内弹道两相流模型都是在欧拉法基础上建立的。为了避免火药床粒子云假设的误差,本文将欧拉法与拉格朗日法结合起来,建立起一种新的火炮内弹道模型——离散粒子模型,同时在气相场中考虑湍流的影响.文中还简单介绍了一种新的算法——单元内颗粒源法.     

二维CE/SE方法在内弹道湍流两相流动中的应用

本文根据CE/SE方法思想，构造湍流二维两相流动的CElSE数值计算的格式。采用此格式对膛内二维湍流两相流动进行数值计算。计算结果表明：对中心点火方式，在点传火过程初期，膛内压力在径向与轴向上存在较大的压力梯度，当火药全部着火后，药室内径向压力逐渐趋于一致；在靠近点火管附近，传火孔喷射的高速燃气和固体火药颗粒相互影响，气相形成不同程度的旋涡，能提高火药颗粒点火的均匀程度；采用湍流两相流模型的数值计算结果反映实际规律，能更加细致真实地反映壁面附近物理量的变化。     

火药颗粒床中的爆轰波结构

用两相连续混合理论研究了火药颗粒床中的两相稳态爆轰波特性。发现相间传热和压缩效应不是决定两相爆轰结构的重要机理，分析了两相稳态爆轰和均相ＺＮＤ理论的差别，讨论了一维两相稳态爆轰的存在条件，为高密实火药床避免爆轰的危险提供了重要信息。     

气体发生器中心点火管爆炸过程的数值计算

介绍了运用内弹产道模型对气体发生器中心点火过程进行了数值模拟的方法。把点火药的颗粒直径，装填密度，中心点火管的开孔数以及开孔的密封材料性能对燃气流场的影响进行了数值计算。     

燃气射流气固两相数值模拟与颗粒冲刷分析

针对燃气射流中的气固两相流动和燃气射流中固体颗粒对壁面的冲刷作用，从耦合固体颗粒源相作用的雷诺平均N-S方程出发，燃气相采用有限体积法，固体颗粒相采用拉格朗日轨道模型．计算了燃气射流的气固两相流场，并分析不同直径的固体颗粒在流场中的轨迹及速度。在数值模拟的基础上．采用条件相似的估算方法估计固体颗粒对置于燃气射流流场中壁面的冲刷作用，分析了固体颗粒在不同直径和不同分布组合情况下对壁面冲刷位置及冲刷程度的影响。结果表明．固体颗粒的直径大小．对颗粒轨迹影响很大．直径小的颗粒轨迹与流场流线吻合的较好．直径大的颗粒因惯性作用与流线吻合差；不同固体颗粒的组合．对壁面机械冲刷位置和程序有较大影响。     

随机因素对弹道性能影响的数值仿真

在考虑火药的随机燃烧和点火管随机破孔的基础上，给出了这两个随机过程的数学模型，结合内弹道的一维两相流模型，用Monte-Carlo方法进行了随机模拟。     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

An Experimental Study on Electro Chemical Machining of Microelectrode

Puts forward a new method in machining microelectrode by electro chemical machining （ECM） and plastic deformed theory. The procedure of this method is to machine the microelectrode according to the basic rule of ECM theory at first. Then, with the change of ECM machining parameters, one of the microelectrode ends is exerted by a load. As a result, the elastic and plastic deformation is produced at the machining section and the microelectrode diameter is reduced. It has been proved that the proposed method can determine the optimum machining parameters to machine the microelectrode of Cu.     

Unscented Kalman Filter for Autonomous Warship Attitude Determination

To address a problem of autonomous attitude determination algorithm using gravitational field and geomagnetic field observation, a new recursive optimization autonomous attitude estimation algorithm is proposed. The algorithm is based on unscented Kalman fiher(UKF), and can synchronously provide the attitude rate information. The simulated results show that the measurement precision of the method could be increased by 2 times compared to that of the common methods.     

Error Coefficient Estimation of Inertial Platformin Its Calibration

The error coefficient estimation of inertial platform in the course of its consecutive ground calibration is studiedA separate-bias algorithm is adopted to estimate the error parameters effectively. The ill-conditioning problem of the equation solution caused by the huge state dimension is also resolved. And the simulation result shows its validity.