International Journal of Numerical Methods for Heat & Fluid Flow: Volume 33 Issue 4

Modelling aileron and spoiler deflections with the linear frequency domain method (LFD) for subsonic flight conditions

Kuharaaj Govindan, Niko Bier

This study aims to predict dynamic responses of aileron and spoiler control surfaces in subsonic flight via the use of surrogate models. The prepared reduced order models prove…

Guest editorial: Aerodynamics for lower environmental impact

Abderrahmane Baïri, Bruno Chanetz

In memory of Jean Delery: 60 years of service to aerodynamics

Bruno Chanetz, Abderrahmane Bairi

Aerodynamic optimization of the exhaust system of an aft-mounted boundary layer ingestion propulsor

Jesús Matesanz-García, Tommaso Piovesan, David G. MacManus

Novel aircraft propulsion configurations require a greater integration of the propulsive system with the airframe. As a consequence of the closer integration of the propulsive…

Towards the design and optimisation of future compact aero-engines: intake/fancowl trade-off investigation

Fernando Tejero, David MacManus, Jesús Matesanz García, Avery Swarthout, Christopher Sheaf

Relative to in-service aero-engines, the bypass ratio of future civil architectures may increase further. If traditional design rules are applied to these new configurations and…

Aerodynamic optimisation of civil aero-engine nacelles by dimensionality reduction and multi-fidelity techniques

Fernando Tejero, David MacManus, Josep Hueso-Rebassa, Francisco Sanchez-Moreno, Ioannis Goulos, Christopher Sheaf

Aerodynamic shape optimisation is complex because of the high dimensionality of the problem, the associated non-linearity and its large computational cost. These three aspects…

Impact of the windbreak transition on flow structures of the high-speed railway and mitigation using oblique structure and circular curve structure transition

Zheng-Wei Chen, Guang-Zhi Zeng, Syeda Anam Hashmi, Tang-Hong Liu, Lei Zhou, Jie Zhang, Hassan Hemida

This paper aims to investigate the variations in the flow fields induced by transition regions in the windbreak structures between the flat ground and the cutting along a railway…

Influence of curvature distribution smoothing on the reduction of aerofoil self-noise

Xiang Shen, Eldad Avital, Zaheer Ikram, Liming Yang, Theodosios Korakianitis, Laurent Dala

This paper aims to investigate the influence of smooth curvature distributions on the self-noise of a low Reynolds number aerofoil and to unveil the flow mechanisms in the…

Research on jet noise characteristics of aeroengine double S-bend nozzles with different cross sections

Jiaru Shao, Xueping Mo, Zijun Zheng, Yu Yang

This study aims to improve the survivability and maneuverability of the fighter,and study the stealth performance of fighter in the jet noise of aeroengine, it is of great…

Three-dimensional simulation effects of trailing-edge actuation on a morphing A320 wing by means of hybrid turbulence modelling

Abderahmane Marouf, Yannick Hoarau, Jean-François Rouchon, Marianna Braza

This study aims to investigate the effects of electroactive morphing on the Airbus A320 Reduced Scale prototype of the H2020 N° 723402 European Research project smart morphing and…

Comparison of flow structures for vane and rod type vortex generators on a wind turbine airfoil

Nishchay Tiwari, Pawel Flaszynski, Thanushree Suresh, Oskar Szulc

The purpose of this paper is to investigate and compare the effects of rod and vane-type vortex generators for wind turbine applications. In large wind turbine rotors, an attached…

Numerical investigation of active flow control using zero-net-mass-flux jets around a high-lift morphing cambered wing-flap system

Hung Truong, Abderahmane Marouf, Alain Gehri, Jan Vos, Marianna Braza, Yannick Hoarau

This study aims to investigate the physical mechanisms of the use of active flow control (AFC) for a high-lift wing-flap configuration.

Numerical investigation of h-Darrieus wind turbine aerodynamics at different tip speed ratios

Kartik Venkatraman, Stéphane Moreau, Julien Christophe, Christophe Schram

The purpose of the paper is to predict the aerodynamic performance of a complete scale model H-Darrieus vertical axis wind turbine (VAWT) with end plates at different operating…

Proposed active flow control enabled hybrid tilt propeller/tilt wing aircraft

Lutz Taubert, Garrett Kay, Israel Wygnanski, Michael Ol

This paper aims to address shortcomings of current tiltrotor designs, such as the small aspect ratio of the wings, large download and the close proximity of the rotor tips. It…

Design and implementation of spanwise lift and gust control via arrays of bio-inspired individually actuated pneumatic flaplets

Alecsandra Court, Omar Selim, Keith Pamment, Christoph Bruecker

Covert feathers on avian wings can show dynamic pop-up behaviour in rapid succession as a reaction to turbulent gusts. The purpose of this paper is to understand the possible flow…

Data-driven augmentation of a RANS turbulence model for transonic flow prediction

Cornelia Grabe, Florian Jäckel, Parv Khurana, Richard P. Dwight

This paper aims to improve Reynolds-averaged Navier Stokes (RANS) turbulence models using a data-driven approach based on machine learning (ML). A special focus is put on…

Wind tunnel measurements of dynamic aerodynamic coefficients using a freely rotating test bench

Laurène Muller, Michel Libsig, Yannick Bailly, Jean-Claude Roy

This paper aims to propose a dedicated measurement methodology able to simultaneously determine the stability derivative C_mα̇ and the pitch damping coefficient sum C_mq + C_mα̇ in a…

Influence of wind and rain environment on operational safety of intercity train running on the viaduct

Guang-Zhi Zeng, Zhi-Wei Li, Sha Huang, Zheng-Wei Chen

Based on the aerodynamic loads and dynamic performances of trains, this study aims to investigate the effect of crosswinds and raindrops on intercity trains operating on viaducts…