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2007 Vol. 33, No. 10

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Comparison of two-equation turbulent models for hypersonic flow simulations
Liu Jingyuan, Lee Chunhian
2007, 33(10): 1131-1135.
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A two-equation turbulent model based on the mixed Reynolds and Favré (density weighted) average was modified for hypersonic compressible turbulence. In order to suppress the influences of the numerical viscosity toward the boundary layer, and yet to maintain simultaneously the high resolution on cap...
Computation of shock wave/boundary-layer interactions with GAO-YONG turbulence equations
Xu Libo, Gao Ge
2007, 33(10): 1136-1140.
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Rational GAO-YONG compressible turbulence equations were applied to simulate numerically the flat plate shock wave/turbulent boundary layer interactions. The equations were solved using the semi-implicit method for pressure-linked equations (SIMPLE) algorithm. The discretization of convection and di...
Numerical simulation of damage and fracture on typical interfaces of plasma sprayed thermal barrier coatings
Wei Hongliang, Yang Xiaoguang, Qi Hongyu
2007, 33(10): 1141-1145.
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Based on the idea of interface damage mechanics, a new type of interface elements with three nodes was proposed. Compared with traditional interface elements, these elements have the quality of indicating the normal direction of interface with arbitrary shape. The modified model was implemented into...
Static aeroelastic divergence analysis by introducing correction techniques of aerodynamic data
Yan De, Yang Chao, Wan Zhiqiang
2007, 33(10): 1146-1149.
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The correction techniques of aerodynamic forces were introduced in the computation and analysis of static aeroelastic divergence. According to steady pressure distribution data on a three dimensional wing, the correction factors to pressure and downwash were obtained and the steady aerodynamic influ...
Large eddy simulation based on non-Favre filtering
Li Bin, Wu Songping
2007, 33(10): 1150-1153.
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The equations of motion for large eddy simulation(LES) were obtained by filtering the compressible NS equations. For conventional compressible LES, the Favre filtering was used. This avoids some complexity, but gives rise to difficulties when comparing to experimental data, which is not Favre filter...
Payload configuration for multi-mission navigation constellation based on ant colony algorithm
He Quan, Han Chao
2007, 33(10): 1154-1157.
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A methodology for multi-mission navigation constellation was presented to optimize the payload configuration via the ant colony algorithm (ACA), which is a heuristic technique based on artificial ant colony searching strategy. An optimization model of payload configuration for multi-mission navigati...
Heat transfer and flow resistance in a notched crossed-rib channel
Deng Hongwu, Pan Wenyan, Tao Zhi, Ding Shuiting
2007, 33(10): 1158-1161.
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The investigation of heat transfer, flow resistance and the pressure across the channel in turbulator cooling channel with a special crossed-rib channel which has slots was studied experimentally, then got amount of experimental results. All experiments were made in stillness states. The method of v...
Optimal design of nozzle for hypersonic vehicle
Cao Deyi, Lee Chunhian
2007, 33(10): 1162-1165.
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An optimal design procedure was proposed by utilizing the method of characteristics in conjunction with a multi-island genetic algorithm. The reflection angle of the nozzle upper wall, the length of the lower wall, and the flap length and angle were chosen to be the design variables, and a parametri...
Attitude description and dynamics modeling for Halo-orbit spacecraft
Xu Ming, Jia Yinghong, Xu Shijie
2007, 33(10): 1166-1169.
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Halo orbit locates about the libration point in the Sun-Earth system and has no orbital plane focusing the Earth, which makes the attitude description and dynamics modeling for Halo-orbit spacecraft is quite different from that for the usual satellite around the Earth. Two different schemes of attit...
Numerical simulation to effects of trailing edge jet on delta wing vortices
Chen Yu, Yan Chao
2007, 33(10): 1170-1173.
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In order to study the influence of trailing edge symmetrical jet on leading edge vortex breakdown location and flow structure over a delta wing, vortex flows over a 60oswept delta wing with trailing symmetrical edge jet and without trailing edge jet were studied using high precise simulation of N-S ...
Fuzzy logic models for unsteady post stall maneuver
Kong Yinan, Wang Lixin, He Kaifeng, Qian Weiqi
2007, 33(10): 1174-1177.
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Abstract:
The fuzzy logic models of unsteady aerodynamics were lucubrated. The system′s fuzzy logic models, structures and parameters identification and model establishment were researched. The new modeling method makes the models has more abroad practicability. With using the typical test data, fuzzy logic m...
Experimental on canopy payload performance of parachute
Yu Li, Zhang Xinhua, Li Shuisheng
2007, 33(10): 1178-1181.
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The opening process of the circle flat parachute with the differential size and the differential vent position of the canopy by the steady flow wind tunnel were dynamic tested. The transient opening loads and the inflation shape of canopy were measured and the dynamic relation of them was gained. Th...
Predictions of collection efficiency and anti-icing surface temperature
Bu Xueqin, Lin Guiping
2007, 33(10): 1182-1185.
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Computational fluid dynamics (CFD) software toolkit FLUENT was used to predict the droplet collection efficiency and anti-icing surface equilibrium temperature on two-dimensional airfoils when the ice protection system was in operation. Collection efficiencies were obtained using the Eulerian multip...
Lateral-directional control characteristics of high aspect-ratio flying wing configurations
Li Lin, Ma Chao, Wang Lixin
2007, 33(10): 1186-1190.
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High aspect-ratio flying wing configurations usually use split-drag-rudder (SDR) and a set of elevons to fulfill the lateral-directional control, without the traditional vertical tail and rudder. The control characteristics of SDR were specially researched, including the generation of the roll and y...
Optimal Lambert transfer based on adaptive simulated annealing genetic algorithm
Lu Shan, Chen Tong, Xu Shijie
2007, 33(10): 1191-1195.
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The optimization of Lambert two-impulse transfer was studied. The traditional optimization methods were inefficient or even ineffective for the Lambert transfer with unfixed initial position, final position and transfer time, because of various variables and the complexity of equations. The adaptive...
State partition technique in mixed-circuit fault diagnosis
Wan Kai, Ma Qishuang, Wang Peng
2007, 33(10): 1196-1199.
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Based on fault dictionary technique and discrete event system (DES) off-line diagnosis model, a new approach called state partition (SP) technique was proposed to model the mixed-circuit in an unified way. Mathematic analysis was made the main part with relationship between system states and state p...
Fault diagnosis of rectifier in aircraft power system
Niu Xingyan, Shen Songhua, Dong Shiliang, Chen Zhuo
2007, 33(10): 1200-1203.
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The built-in test equipment in a type of aircraft power system is composed with traditional logic hardware, so the abilities on expansion and reliability are limited hardly. According to the characters of built-in test equipment in the next generation, such as computerization and intelligence, based...
Performance monitoring and optimization design of database access layer about J2EE management information system
Tang Wenzhong, Xu Xiaoman
2007, 33(10): 1204-1207.
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Based on the character of J2EE management system performance, an application data layer and a database access monitoring tool were designed and implemented for the applications performance optimization during the development period. At the data layer, some special data access operation methods were ...
Sliding mode control of permanent magnet synchronous motor with great inertia load
Li Yi, Guo Hong, Yu Yongqiang
2007, 33(10): 1208-1211.
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When the moment of inertia becomes big, huge inertia torque will be produced when the directly drive permanent magnet synchronous motor(PMSM) system starts, stops or changes speed, thus to bring impact on the system performance. In order to solve this kind of problem, the control method on the slidi...
Kind of guidance device for field vehicle based on embedded image processing
Li Chao, Li Yunhua, Wang Guodong, Li Linsheng
2007, 33(10): 1212-1215.
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The feature of elevating transporter in bridging construction was analyzed. Aimed at the primary problem of vehicle′s guidance and on-site′s practical requirement, a new kind of auxiliary device for vehicle′s guidance based on embedded image processing using single chip microcomputer was developed. ...
Method for measuring the focal distance of 3D-CT imaging system with high accuracy using image auto-correlation
Yang Min, Sun Cuili, Li Baolei
2007, 33(10): 1216-1219.
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In the three dimensional computed tomography imaging system, it is impossible to measure the X-ray focus to object-rotating-axis distance (FOD) by direct means, so how to obtain the value of FOD with simple and feasible method is an involved engineering problem. Through acquiring the digital radiogr...
One novel UAV aerial video compression method
Nie Zhengang, Zhang Xiaolin
2007, 33(10): 1220-1222.
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To resolve the video compression bit rate fluctuation due to odd frames generated by the bad weather or electromagnetic (EM) interference in aerial video sequences from unmanned aerial vehicle (UAV), a new video compression method which analyze video sequences in advance and remove the detected odd ...
Aeronautical static inverter based on repetitive control
Guan Miao, Shen Songhua, Wang Yong, Ma Qishuang
2007, 33(10): 1223-1227.
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Aimed at the voltage wave distortion of ASI (aeronautical static inverter), a scheme based on the repetitive control technique was proposed. The repetitive controller based on the theory of internal model produces correction signal based on the control error of the last cycle to eliminate the error ...
Novel deterministic directed diffusion routing protocol for WSNs
Zhong Ying, Feng Jinxin, Xiong Qingxu
2007, 33(10): 1228-1232.
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A novel deterministic directed diffusion routing protocol was proposed for wireless sensor networks (WSNs) to prolong network lifetime. The sink broadcasted its Interest periodically in flooding fashion. A node set up its gradients towards the neighbor nodes in the arrival order of Interest from the...
Spacecraft attitude slew maneuver control via backstepping method
Zheng Minjie, Xu Shijie
2007, 33(10): 1233-1236.
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The backstepping control method was applied to the slew maneuver of the rigid spacecraft. In order to avoid the complicated calculation of the derivation of the intermediate control law which is required in the conventional backstepping method, the intermediate control law presents in a form of diff...
Method for inducing reliability test measured vibration data
Luo Min, Jiang Tongmin, Yuan Hongjie
2007, 33(10): 1237-1240.
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To solve the problem of traditional inductive method for measured random vibration data only applying to normal distribution data, the way for selecting the suitable curve in Johnson curves family was introduced, and the method of fitting measured non-normal random vibration data by Johnson curves f...
Modeling technique of aircraft development based on configuration item
Tao Jian, Fan Yuqing
2007, 33(10): 1241-1245.
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Business process of aircraft manufacturing industry is a dynamic and complicated system engineering with that the quantity of data is huge. How to build product development module simply and perfectly is always a difficult problem in business process improvement (BPI). The importance of configuratio...
Electrochemical behaviour of LY12CZ under applied stress
Rao Sixian, Zhang Yubo, Zhu Liqun, Zhong Qunpeng
2007, 33(10): 1246-1250.
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Potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) techniques were applied to investigate the corrosion behavior of LY12CZ in 3％NaCl aqueous solution.The effects of stress to anodic polarization behavior,free corrosion potential,breakdown potential,polarization resistance a...
Straightening technique for distorted aeronautical monolithic component based on finite element numerical simulation
Zhang Hongwei, Zhang Yidu, Wu Qiong, Zhao Xiaoci
2007, 33(10): 1251-1255.
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For aeronautical monolithic component, because of the complication of machining distortion, straightening parameters are difficult to be gained quantitatively in the process of distortion correcting that inevitably leads to the distorted components discarded as useless. The research on straightening...

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