Browsing by Author "Aerospace"

Now showing items 1-18 of 18

    • 3D CFD modeling of air flow through a porous fence 

      Xu, Yizhong; Mustafa, Mohamed Y.; Knight, Jason; Virk, Muhammad; Haritos, George (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Numerical simulation has played an important role in systematic study on the performance of porous fences over the last three decades. In this paper, a 3D CFD model to simulate air flow through a porous fence is presented. ...

    • An aerodynamic analysis of a novel small wind turbine based on impulse turbine principles 

      Ying, Pei; Chen, Yong; Xu, Yigeng (2015-03-31)
      The paper presents both a numerical and an experimental approach to study the air flow characteristics of a novel small wind turbine and to predict its performance. The turbine model was generated based on impulse turbine ...

    • Computational and Experimental Investigations of an Omni-Flow Wind Turbine 

      Ying, Pei; Chen, Yong; Xu, Yigeng; Tian, Yuan (2015-05-15)
      Both numerical and experimental studies were conducted to evaluate the performance of an omni-flow wind turbine designed to provide renewable electricity on the top of urban buildings like skyscrapers. The numerical approach ...

    • Computational Modelling of Blades for a Novel Wind Turbine 

      Ying, Pei; Chen, Yong; Xu, Yigeng (Institute of Electrical and Electronics Engineers (IEEE), 2012-06)
      Blades of a novel wind turbine system based on the principles of impulse turbines were designed in 3D and tested by computational fluid dynamics (CFD) simulation. This new turbine system is suitable to construct on the ...

    • Contact behaviour of composite laminate under quasi-static indentation load 

      Shen, Zeng; Xu, Yigeng; Chrysanthou, A. (2014)
      A viable solution to the ever-demanding weight-saving target in aerospace industry is the replacement of conventional engineering alloys with composite materials in primary structures. A major concern to the effective use ...

    • Correlation of dent depth to maximum contact force and damage of composite laminates 

      Shen, Zeng; Xu, Yigeng; Chrysanthou, A. (2015-01-01)
      A major concern affecting the efficient use of carbon fibre reinforced composite laminates in the aerospace industry is the low velocity impact damage which may be introduced accidentally during manufacture, operation or ...

    • Delamination threshold load of composite laminate under low-velocity impact 

      Xu, Yigeng; Shen, Zeng; Tiu, William; Xu, Yizhong; Chen, Yong; Haritos, George (2013)
      A key factor affecting the use of carbon fibre reinforced composite laminates is the low velocity impact damage which may be introduced accidentally during manufacture, operation or maintenance of the component. Among the ...

    • Effect of Electromagnetic Treatment on Fatigue Resistance of 2011 Aluminium Alloy 

      Lewis, Andrew; Mohin, Muhodin; Toofanny, Hasif; Babutskyi, Anatolii; Xu, Yigeng (2016-08-08)
      Beneficial effects of the electromagnetic treatment on fatigue resistance were reported on several engineering alloys. These could be linked to the dislocation activity and the rearrangement of the crystal structure of the ...

    • Effect of Plastic Deformation on Compliance Curve Based Crack Closure Measurement 

      Lewis, Andrew; Mohin, Muhodin; Chrysanthou, Andreas; Xu, Yigeng (2016-09-01)
      Fatigue crack growth depends heavily on near tip stress-strain behavior controlled by many micromechanical and microstructural factors. Crack closure is widely used to rationalize crack growth behaviour under complex loading ...

    • Factors Influencing the Performance of Porous Wind Shields 

      Xu, Yizhong; Virk, Muhammad S.; Knight, Jason; Mustafa, Mohamad Y.; Haritos, George (TRANS TECH PUBLICATIONS LTD, 2013)
      Porosity, porosity distribution, porous shape, porous size, thickness of shield, shield height &width, and shield orientation are the factors that influence the performance of porous wind shields. Among them, porosity is ...

    • Load sequence effect on fatigue damage 

      Xu, Y.G.; Wang, L.; Chen, Yong; Tiu, W. (2012)
      Reliable damage tolerant design of airframe structures relies on the accurate life prediction of fatigue cracks propagating from a detectable size to the critical size, which is challenging due to the complex load sequence ...

    • Numerical scheme to simulate combined mixing and separating Newtonian fluid flow in a channel 

      Khokhar, Rahim; Chen, Yong; Calay, Rajnish; Xu, Yigeng (2013)
      The paper presents a semi-implicit time-stepping Taylor-Galerkin pressure correction primitive variable finite element algorithm to simulate fluid flow for two dimensional planar combined mixing and separating geometry. ...

    • Numerical simulation of combined mixing and separating flow in channel filled with porous media 

      Khokhar, Rahim; Chen, Yong; Xu, Yigeng; Calay, Rajnish (2013-05)
      Various flow bifurcations are investigated for two dimensional combined mixing and separating geometry. These consist of two reversed channel flows interacting through a gap in the common separating wall filled with porous ...

    • Numerical simulation of crack tip behaviour under fatigue loading 

      Xu, Yigeng; Tiu, William; Xu, Yizhong (2013)
      Fatigue damage is a localized phenomenon controlled by the near-tip crack behavior. This paper presents an application of a dislocation distribution technique to the simulation of crack tip behavior under fatigue loading. ...

    • On the turbulent flow models in modelling of omni-flow wind turbine 

      Chen, Yong; Ying, Pei; Xu, Yigeng; Tian, Yuan (2014-10)
      The computational fluid dynamics (CFD) has a wide application in the wind energy industry. In CFD simulations, a turbulence model plays a significantly important role in accuracy and resource cost. In this paper, a novel ...

    • A review of the effects of ice accretion on the structural behavior of wind turbines 

      Alsabagh, Abdel; Tiu, William; Xu, Yigeng; Virk, Muhammad (2013-02)
      Icing of wind turbines happens occasionally at different latitudes and locations in the world and consequently affects the wind turbine fatigue loads. Large ice accretion may cause wind turbine vibration due to uneven ice ...

    • Strip yield modelling of fatigue crack under variable amplitude loading 

      Singh, Konjengbam Darunkumar; Xu, Yigeng; Sinclair, Ian (2011-12)
      The results from 'strip yield' approach of the FASTRAN type models of plasticity induced crack closure effects of fatigue cracks subjected to variable amplitude loadings are presented. The strip yield results are compared ...

    • The Use of Pseudo-Inverse Methods in Reconstructing Loads on a Missile Structure 

      Vishwakarma, R.; Turner, Denis; Lewis, Andrew; Chen, Yong; Xu, Yigeng (2012)
      A missile during air carriage is subjected to high vibratory forces. These forces consequently impose high levels of stress on the attachment points to the aircraft. A repetitive application of stress causes fatigue. ...