Wei Yang

Publications

• Application of High Lift Configuration to Wing-in-ground Effect

  Yang W., Lin F., Yang Z.

  Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 01/2011;

• Aerodynamic Investigation on Tiltable Endplate for WIG Craft

  Yang W., Yang Z.

  Aircraft Engineering and Aerospace Technology. 01/2011;
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  Impact points

  Schemed Power-augmented Flow for Wing-in-ground Effect Craft in Cruise

  Yang W., Yang ZG

  Chinese Journal of Aeronautics. 01/2011; 24:119-126.

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• Complex Flow for Wing-in-ground Effect Craft with Power Augmented Ram Engine in Cruise

  Z. Yang, W. Yang

  Chinese Journal of Aeronautics. 02/2010; 23:8.

  In an effort to provide detailed insight into the aerodynamic characteristics of Wing-in-ground effect (WIG) craft with Power Augmented Ram (PAR) engine, the popular mean to reduce the power for takeoff and to improve aerodynamic performance, numerical simulations were carried out on WIG craft model... [more] In an effort to provide detailed insight into the aerodynamic characteristics of Wing-in-ground effect (WIG) craft with Power Augmented Ram (PAR) engine, the popular mean to reduce the power for takeoff and to improve aerodynamic performance, numerical simulations were carried out on WIG craft models in cruise. Simplified engine models were employed into the simulations. Two cruise modes for PAR engine were considered. The aerodynamic characteristics of the WIG crafts and other features were studied. Compari-sons with WIG craft model without PAR showed that shut off of the PAR engine results in an increase in drag and less change in lift. Accordingly for the work of the PAR engine, the air blown from the engine accelerates the flow around the upper surface and a high speed attached flow near the trailing edge was recorded. With the schemed PAR flow, more suction force is realized and the flow fea-tures over the wing vary noticeably. It was also shown that the Coanda effect, provided with an attached flow, introduces a considerable flow mode for WIG craft with PAR engine in cruise. The results refresh our understanding on aerodynamic characteristics of WIG crafts.

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• Effects of Design Parameters on Longitudinal Static Stability for WIG Craft

  W. Yang, Z. Yang

  International Journal of Aerodynamics. 02/2010; 1:17.

  The longitudinal stability characteristics of a Wing-in-Ground effect (WIG) craft are quite different from that of conventional airplane due to the existence of ground effect. The effects of design parameters including wing section, stabilizer, wing planform and endplate on longitudinal static stabi... [more] The longitudinal stability characteristics of a Wing-in-Ground effect (WIG) craft are quite different from that of conventional airplane due to the existence of ground effect. The effects of design parameters including wing section, stabilizer, wing planform and endplate on longitudinal static stability of WIG craft were studied based on numerical results. Contributions of these parameters on stabilizing the WIG craft by shifting the aerodynamic centers in pitch and height were discussed respectively. The present study resulted in deep understanding of relationship between longitudinal static stability and WIG craft configuration, provided references for designers and operators of WIG craft theoretically.

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• Numerical study on longitudinal static stability of a canard WIG craft (in Chinese)

  LI Yu-long, YANG Wei, YANG Zhi-gang

  Flight Dynamics. 02/2010; 28:9-12.

• Three-dimensional Ground Viscous Effect on Study of Wing-in-ground Effect

  Wei Yang, Feng Lin, Zhigang Yang

  The Third International Conference on Modelling and Simulation (ICMS2010), Wuxi, China; 01/2010

  Ground viscous effect on wing in ground effect is studied numerically. Aerodynamics of wing in ground effect with different ground boundary conditions are compared. Viscous effect of fixed ground decelerates flow between wing and the ground. Adverse pressure gradient near ground is captured in fixed... [more] Ground viscous effect on wing in ground effect is studied numerically. Aerodynamics of wing in ground effect with different ground boundary conditions are compared. Viscous effect of fixed ground decelerates flow between wing and the ground. Adverse pressure gradient near ground is captured in fixed ground simulation, and boundary layer separation may occur. Development of the separation bubble on ground changes in span wise. The simulation reveals ground viscous effect on study of three-dimensional wing in ground effect under fixed ground.

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• Ground Viscous Effect on Stall of Wing in Ground Effect

  Ying Chengjiong, Yang Wei, Yang Zhigang

  The Third International Conference on Modelling and Simulation (ICMS2010), Wuxi, China; 01/2010

  Most experimental investigations on wing in ground effect were carried out based on fixed ground wind tunnel test. Ground viscous effect would affect the stall characteristics of wing in ground effect. A numerical study is performed to clarify the ground viscous effect on stall of wing in ground eff... [more] Most experimental investigations on wing in ground effect were carried out based on fixed ground wind tunnel test. Ground viscous effect would affect the stall characteristics of wing in ground effect. A numerical study is performed to clarify the ground viscous effect on stall of wing in ground effect. Fixed ground based and moving ground based wind tunnel tests are considered in the simulations. Stall characteristics of wing in ground effect are revealed. It is found that stall angle of wing in ground effect is increased with fixed ground. The results provide a reference for accurately predicting and evaluating stall of wing-in-ground effect (WIG) craft.

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• Aerodynamics Study of WIG Craft near Curved Ground

  Yang W., Ying C., Yang Z.

  ICHD2010, Shanghai; 01/2010

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• Ground Viscous Effect on 2D Flow of Wing in Ground Proximity

  Yang Z., Yang W., Jia Q.

  Engineering Applications of Computational Fluid Mechanics. 01/2010; 4:521-531.

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• Analysis of Two Configurations for a Commercial WIG Craft based on CFD

  Zhigang YANG, Wei YANG, Yulong LI

  27th AIAA applied aerodynamics conference, San Antonio,TX; 06/2009

  The Wing-In-Ground Effect (WIG) Craft, a vehicle flying over the ground, is a promising transportation mean in the near future. It has high speed and low fuel consumption. The current work examines the performance of a WIG Craft, a regional 50-passenger WIG Craft designed for commercial use, by usin... [more] The Wing-In-Ground Effect (WIG) Craft, a vehicle flying over the ground, is a promising transportation mean in the near future. It has high speed and low fuel consumption. The current work examines the performance of a WIG Craft, a regional 50-passenger WIG Craft designed for commercial use, by using numerical simulations. Two configurations, including the airplane type and the Lippisch type, were taken into consideration in order to achieve good capability. The airplane type WIG Craft with rectangular wing has a merit in making best use of ground effect. The Lippisch type WIG Craft with reversed delta wing behaves sufficient longitudinal stability in extreme ground effect region. Furthermore, the method of computational fluid dynamics (CFD) provides a convenient way for the present study. The numerical results presented the aerodynamic forces and depicted the flow features for the two configurations. The longitudinal stability is a vital factor, and was evaluated through analyzing the relationship between the aerodynamic center of pitch and the aerodynamic center of height. Finally, the optimal configuration for the project was specified based on the analysis. The current work exhibits the important phase in pre-design of the project.

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• Aerodynamic Investigation of a 2D Wing and Flows in Ground Effect

  YANG Wei, YANG Zhigang

  CHINESE JOURNAL OF COMPUTATIONAL PHYSICS. 03/2009; 26:10.

  A numerical investigation is performed to study aerodynamics of a 2D NACA0012 wing and flows in ground effect ( IGE) . Lift and drag forces are obtained and pressure distribution on airfoil surfaces is recorded at different angles of attack and ground clearances. Viscous flow near ground and air com... [more] A numerical investigation is performed to study aerodynamics of a 2D NACA0012 wing and flows in ground effect ( IGE) . Lift and drag forces are obtained and pressure distribution on airfoil surfaces is recorded at different angles of attack and ground clearances. Viscous flow near ground and air compressibility are taken into account. High lift is obtained as the airfoil is in close proximity to the ground. The stall angle decreases with reduction of the ground clearance , due to higher adverse pressure gradient. Viscous effect of floor shows less effect on airfoil. Compressibility should be taken into account at lower ground clearances.

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• A Study on Longitudinal Stability and Configuration of Wing-in-Ground Effect based on CFD

  Wei Yang, Zhigang Yang

  2008 National Academic Symposium for Ph. D. Candidates andand Tri-University Workshop on Aero-Structural Mechanics & Aerospace Engineering 2008(NASPC/TUWMAE2008), TsinghuaUniversity, Beijing, China; 10/2008

  The longitudinal stability characteristics of a Wing-in-Ground effect craft are quite different from the conventional airplane due to the existence of ground effect. The relationship between longitudinal stability and configuration of Wing-in-Ground effect was investigated based on the CFD methods. ... [more] The longitudinal stability characteristics of a Wing-in-Ground effect craft are quite different from the conventional airplane due to the existence of ground effect. The relationship between longitudinal stability and configuration of Wing-in-Ground effect was investigated based on the CFD methods. The three important factors influencing longitudinal stability were taken into consideration. Flow around wings in ground effect and aerodynamic centers of pitch and height were presented. Contributions of the aerodynamic centers of pitch and height to longitudinal stability were studied respectively. The study resulted in deep understanding of longitudinal stability criterion and provided references for designers and operators of Wing-in-Ground effect craft theoretically.

• Numerical simulation on span-dominated ground effect of 3D wing in ground effect (in Chinese)

  YANG Wei, YANG Zhigang

  ComputerAided Engineering. 09/2008; 17:5.

  To study the Span Dominated Ground Effect ( SDGE) ofwing in ground effect, the N-S equations of steady incomp ressible flow and the standard k-ε turbulence model are solved by FLUENT, and the flow of 3D wing in ground effect is simulated under the ground effect. Firstly, given an area and a ground c... [more] To study the Span Dominated Ground Effect ( SDGE) ofwing in ground effect, the N-S equations of steady incomp ressible flow and the standard k-ε turbulence model are solved by FLUENT, and the flow of 3D wing in ground effect is simulated under the ground effect. Firstly, given an area and a ground clearance, the wings in ground effect with different aspect ratios are simulated. Secondly, given a chord length and a relative ground clearance, the wings in ground effect with different aspect ratios and endp late are simulated. The curves of aerodynamic characteristics are p rovided for the wings in ground effectwith different aspect ratios and endp late, the effects of aspect ratio and endp late on the position of wingtip vortex core and downwash angle are revealed. The SDGE is more p rominent under the ground effect and the endp late further strengthens the aerodynamic performance of the wings; the wingtip vortex moves outwards due to the existence of the ground and the downwash angle is reduced. The simulation results p rovide theoretical basis for the design and op timization on the crafts of wing in ground effect.

• On the Performance of V-BLAST Detectors in MIMO MT-CDMA Uplink over Multipath Fading Channel

  Wei Yang, Yang Wei

  Networking, 2007. ICN '07. Sixth International Conference on; 05/2007

  In this paper, an asynchronous multiple-input multiple-output multitone code division multiple access (MIMO MT-CDMA) scheme for the uplink of the mobile communication in a frequency selective fading channel is analyzed. Maximum ratio combining (MRC) and linear zero-forcing (ZF) V-BLAST detectors are... [more] In this paper, an asynchronous multiple-input multiple-output multitone code division multiple access (MIMO MT-CDMA) scheme for the uplink of the mobile communication in a frequency selective fading channel is analyzed. Maximum ratio combining (MRC) and linear zero-forcing (ZF) V-BLAST detectors are applied at the receiver. The average bit error rate (BER) expression for uniform multipath power profile is derived when the number of receive antennas is greater than that of transmit antennas. Numerical results verify the BER expression and show that the number of transmit and receive antennas has a significant effect on the BER performance. Space diversity and path diversity have different abilities to improve the performance. The average BER performance of the proposed system is also compared with that of a conventional MT-CDMA system.

• On the Performance of V-BLAST Detectors in MIMO MT-CDMA Uplink over Multipath Fading Channel.

  Wei Yang, Yang Wei

  Sixth International Conference on Networking (ICN 2007), 22-28 April 2007, Sainte-Luce, Martinique, France; 01/2007