Ramada, A Successful Example

After entry into the WTO, China's hotels are being challenged by the global economy and overseas counterparts. They should seek creation and development to fight against the fierce competition. Ramada Pudong Hotel, managed by the Shanghai Airport Group Civil Aviation Property Company Ltd, has become a successful example in creative management.     

A National Airport Conference Held

A national working conference on civil airport was held at Ramada Pudong Airport Hotel on August 10. At the two-day conference, CAAC Minister Yang Yuanyuan and Shanghai Vice-Mayor Yang Xiong delivered speeches. Yang Guoqing, vice minister of CAAC, gave a working report on upgrading China's civil airports.Yang Yuanyuan required all the airports to adhere to the     

She has a bright mind——An interview with Zhu Huihui

Zhu Huihui, a 25-year-old girl, acts as League branch secretary of Xiangyin Group. She was awarded by the State and the city as a service star in 2005, and won a May 1 labour model issued by the city government in 2006. Zhu, head of the group, once served VIP rooms for three years and was transferred to the information desk in the next four years. She was lucky because she gained knowledge and experiences from her service.     

The 8th Shanghai International Film Festival Closes

Shanghai was full of artistic atmosphere in June with a gathering of film stars, which was brought about by the 8th Shanghai International Film Festival held from June 11 to 19. The festival was echoed by the centenary of the birth of China's films. The jury for the festival's top award---the Golden Goblet Award---gave its Best Picture prize to the Japanese movie ``The Village Album' despite the absence of its director Mitsuhiro Mihara. Its leading actor, Ken Kaito, was also given the…     

Airport City——A visit to Amsterdam Schiphol Airport in the Netherlands

Gerlack J Cerfontaine, president and chief executive officer of Schiphol Group in the Netherlands, announced at the New Year's Press Conference that Amsterdam Schiphol Airport handled 42.5 million passengers in 2004, up 6.5 percent over 2003. Its cargo volume broke the record to reach 1.4 milliontons, an increase of 8.5 per cent over the previous year.The airport handled 402,700 flights, a rise of 2.5 percent.It ranked fourth in carrying passengers and third in ca…     

International Civil Aviation Co-operation Reinforced Wu Nianzu attends Asia Aviation Exhibition

Wu Nianzu, chairman and president of the Shanghai Airport (Group) Company, was invited by Huang Wenliang, director of Singapore Civil Aviation Administration, to attend 2004 Asia Aviation Exhibition held in Singapore on February 22 to 28. His party included Wang Guangdi, vice president of the company.They attended the opening ceremony, visited the     

Ameco-Beijing——a big name in a booming market

Catching up with the fast development of worldeconomy,China pulled up its bamboo curtain andsponsored an even more faster revolution of economytill 1978.The cooperation with German Lufthansa isone of China’s major steps to upgrade its civil avia-tion industry.The Aircraft Maintenance＆EngineeringCo.-Beijing(Ameco-Binjing),a partnership start-ed in 1989 by Air China and German Lufthansa is thelargest and the most powerful civil aircraft mainte-nance company in China.     

Cuban Cigar Shop Opens

Habano SA in Cuba opened the first La Casa Del Habano cigar shop at Shanghai Westin Hotel on June 17. Cuban cigar represents a culture as well as a backbone industry in Cuba. Its foreign exchange income accounts for 17 per cent of the country's total and the industry provides 300,000 job opportunities. As an international metropolis, Shanghai has become a home to many overseas extravagant brands. Foreigners living in the city and local celebrities are fond of cigar, helping form a cigar …     

Airport Project Goes Smoothly

The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.     

Planar laser scattering visualization of streamwise vortex pairs in a Mach 6 flow

A series of cross-sectional flow fields of Counterrotating Vortex Pairs(CVPs) generated by a large-scale ramp vortex generator is observed using an ice-cluster-based Planar Laser Scattering(PLS) method in a shock tunnel with a nominal flow Mach number of 6. Combined with a numerical simulation, two streamwise CVPs with opposite rotating directions are identified in the wake flow of the vortex generator with an absence of a boundary layer, namely, a Primary CVP(PCVP) and a Secondary CVP(SCVP). Th...     

Modeling and Control for Magnetostrictive Hysteresis

To deal with the rate-dependent hysteresis presented in a magnetostrictive actuator, a new method of modeling and control is pro-posed. The relationship between inputs and outputs of the actuator is approximately described by a dynamic differential equation with two rate-dependent coefficients, each expressed as a polynomial of frequency. For a given frequency, the coefficients will be able to be estimated by approximating the experimental data of the outputs of the magnetostrictive actuator. Based on this model, a quasi-PID con-troller is designed. In the space of the coefficients and frequency, the stable domain of closed loop system with hysteresis is analyzed. The numerical simulation and experiments have born witness to the feasibility of the proposed new method.     

SOME ASPECTS OF TWO AIRCRAFT COMBAT IN PLANE——A METHOD OF DEALING WITH TWO-TARGET PROBLEM

A method of dealing with two-target problem in terms of coordinate transformation and differential game is presented in this paper. It has analysed the capture region, escape region and danger region. This approach is helpful to a pilot to possess the favourable position in an air-to-air combat in plane.     

Deformation Behavior of Medium-strength TA18 High-pressure Tubes During NC Bending with Different Bending Radii

To improve the forming quality and forming limit of the numerical control (NC) bending of high-pressure titanium alloy tubes, in this study, using three-dimensional (3D) finite element method, deformation behavior of medium-strength TA18 high-pressure tubes during NC bending with different bending radii is investigated. The results show that the cross-sectional deformation and the wall thickness variation during NC bending of TA18 tubes using a small bending radius (less than 2 times of tube outside diameter) are clearly different from that using a normal bending radius (between 2 and 4 times of tube outside diameter). For bending with a normal bending radius, with or without a mandrel, the distribution of the flattening in the bending area resembles a platform and an asymmetric parabola, respectively. For bending with a small bending radius, with or without a mandrel, the flattening both distributes like a parabola, but the former has a stable peak which deflects toward the initial bending section, and the latter has a more pronounced peak with a bending angle and deflects slightly toward the bending section. The wall thickness variations with a normal bending radius, with and without a mandrel, both resemble a platform when the bending angle exceeds a certain angle. For the bending with a small radius, the distribution of the wall thickness variation without a mandrel follows an approximate parabola which increases in value as the bending angle increases. If a mandrel is used, the thickening ratio increases from the initial bending section to the bending section.     

Company Leaders To Inspect Service Work

Wu Nianzu, Party secretary, chairman and president of the Shanghai Airport Group Company, inspected the service work at Pudong Airport on August 28.A forum on service work was held with more than 90 persons attending, including Cao Huifang, general manager of the Shanghai Airport Co Ltd, and Zhu Jiyu, Party secretary of the company.     

Dynamic modeling and analysis of vortex filament motion using a novel curve-fitting method

Applications of a novel curve-fitting technique are presented to efficiently predict the motion of the vortex filament, which is trailed from a rigid body such as wings and rotors. The governing equations of the motion, when a Lagrangian approach with the present curve-fitting method is applied, can be transformed into an easily solvable form of the system of nonlinear ordinary differential equations. The applicability of Be′zier curves, B-spline, and Lagrange interpolating polynomials is investigated. Local Lagrange interpolating polynomials with a shift operator are proposed as the best selection for applications, since it provides superior system characteristics with minimum computing time, compared to other methods. In addition, the Gauss quadrature formula with local refinement strategy has been developed for an accurate prediction of the induced velocity computed with the line integration of the Biot–Savart law. Rotary-wing problems including a vortex ring problem are analyzed to show the efficiency, accuracy, and flexibility in the applications of the proposed method.     

Effect of a transverse plasma jet on a shock wave induced by a ramp

We conducted experiments in a wind tunnel with Mach number 2 to explore the evolution of a transverse plasma jet and its modification effect on a shock wave induced by a ramp with an angle of 24°. The transverse plasma jet was created by arc discharge in a small cylindrical cavity with a 2 mm diameter orifice. Three group tests with different actuator arrangements in the spanwise or streamwise direction upstream from the ramp were respectively studied to compare their disturbances to the shock wave. As shown by a time-resolved schlieren system, an unsteady motion of the shock wave by actuation was found: the shock wave was significantly modified by the plasma jet with an upstream motion and a reduced angle. Compared to spanwise actuation, a more intensive impact was obtained with two or three streamwise actuators working together. From shock wave structures, the control effect of the plasma jet on the shock motion based on a thermal effect, a potential cause of shock modification, was discussed. Furthermore, we performed a numerical simulation by using the Improved Delayed Detached Eddy Simulation(IDDES) method to simulate the evolution of the transverse plasma jet plume produced by two streamwise actuators. The results show that flow structures are similar to those identified in schlieren images. Two streamwise vortices were recognized, which indicates that the higher jet plume is the result of the overlap of two streamwise jets.     

Application of Tandem Cascade to Design of Fan Stator with Supersonic Inflow

This article proposes a tandem cascade constructed to tackle the thorny problem of designing the high-loaded stator with a supersonic inflow and a large turning angle.The front cascade adopts a supersonic profile to reduce the shock wave intensity turning the flow into subsonic,while the rear cascade adopts a subsonic profile with a large camber offering the flow a large turning angle.It is disclosed that the losses would be minimized if the leading edge of the rear cascade lies close to the pressure side of the front cascade at a distance of 20% pitch in pitch-wise direction without either axial spacing or overlapping in axial direction.The 2D numerical test results show that,with the inflow Mach number of 1.25 and the turning angle of 52°,the total pressure loss coefficient of the tandem cascade reaches 0.106,and the diffusion factor 0.745.Finally,this article has designed and simulated a high-loaded fan stage with the proposed tandem stator,which has the pressure ratio of 3.15 and the efficiency of 86.32% at the rotor tip speed of 495.32m/s.     

Analytical Solution for Predicting In-plane Elastic Shear Properties of 2D Orthogonal PWF Composites

This paper proposes a new analytical solution to predict the shear modulus of a two-dimensional(2D) plain weave fabric(PWF) composite accounting for the interaction of orthogonal interlacing strands with coupled shear deformation modes including not only relative bending but also torsion,etc.The two orthogonal yarns in a micromechanical unit cell are idealized as curved beams with a path depicted by using sinusoidal shape functions.The internal forces and macroscopic deformations carried by the yarn families,together with macroscopic shear modulus of PWFs are derived by means of a strain energy approach founded on micromechanics.Three sets of experimental data pertinent to three kinds of 2D orthogonal PWF composites have been implemented to validate the new model.The calculations from the new model are also compared with those by using two models in the earlier literature.It is shown that the experimental results correlate well with predictions from the new model.     

Modeling and simulation of a time-varying inertia aircraft in aerial refueling

Studied in this paper is dynamic modeling and simulation application of the receiver aircraft with the time-varying mass and inertia property in an integrated simulation environment which includes two other significant factors, i.e., a hose–drogue assembly dynamic model with the variable-length property and the wind effect due to the tanker's trailing vortices. By extending equations of motion of a fixed weight aircraft derived by Lewis et al., a new set of equations of motion for a receiver in aerial refueling is derived. The equations include the time-varying mass and inertia property due to fuel transfer and the fuel consumption by engines, and the fuel tanks have a rectangle shape rather than a mass point. They are derived in terms of the translational and rotational position and velocity of the receiver with respect to an inertial reference frame. A linear quadratic regulator(LQR) controller is designed based on a group of linearized equations under the initial receiver mass condition. The equations of motion of the receiver with a LQR controller are implemented in the integrated simulation environment for autonomous approaching and station-keeping of the receiver in simulations.