Magnus Tormalm

• Master of Science
• Deputy Research Director at Swedish Defence Research Agency

View Video Presentation: https://doi.org/10.2514/6.2022-0416.vid Within the framework of the NATO Science and Technology Organization Applied Vehicle Technology Task Group AVT316 calculations have been made of the supersonic flow around a slender body with wings and fins. In this paper a synthesis of the results obtained using the Reynolds Averaged...

View Video Presentation: https://doi.org/10.2514/6.2022-1176.vid A research program has been underway for four years to study vortex interaction aerodynamics that are relevant to military air vehicle performance. The program has been conducted under the auspices of the NATO Science and Technology Organization (STO), Applied Vehicle Technology (AVT)...

View Video Presentation: https://doi.org/10.2514/6.2022-1685.vid Hybrid Reynolds Average Navier-Stokes (RANS) - Large Eddy Simulations (LES) have been applied to predict the rolling moment coefficient of a generic missile at high angle of incidence in supersonic flow. The missile airframe was rolled which generated unsymmetrical vortices affecting...

View Video Presentation: https://doi.org/10.2514/6.2022-2307.vid In this study, the influence of the turbulence model, grid resolution and flow solvers on the results of RANS simulations is investigated. The work is part of the NATO AVT Task Group AVT-316 (Vortex Interaction Effects Relevant to Military Air Vehicle Performance). Simulations have be...

View Video Presentation: https://doi.org/10.2514/6.2022-2308.vid Time-accurate, turbulence scale resolving simulations of a transonic missile at high incidence and roll angle were performed and compared to simulations using standard Reynolds-Averaged Navier-Stokes turbulence models. The scale resolving simulations showed improved prediction of the...

Hybrid Reynolds Average Navier-Stokes (RANS) - Large Eddy Simulations (LES) have been applied to predict the rolling moment coefficient of a generic missile at high angle of incidence in supersonic flow. The missile airframe was rolled which generated unsymmetrical vortices affecting the downstream tail fin section. Traditional RANS indicated diffi...

In the European project AFLoNext, active flow control (AFC) measures were adopted in the wing tip extension leading edge to suppress flow separation. It is expected that the designed wing tip extension may improve aerodynamic efficiency by about 2 per cent in terms of fuel consumption and emissions. As the leading edge of the wing tip is not protec...

In the framework of the AFLoNext European project the active flow control (AFC) was applied in the area of leading edge of the wing tip extension with the curved leading edge. It is expected that the designed wingtip extension will provide an improvement in aerodynamic efficiency in cruise with a net benefit in fuel consumption and emission reducti...

The next generation of agile unmanned combat aerial vehicles has put focus on the stability and control of low observable platforms. Without the traditional fin for yaw control combined with delta wings, a challenging task has been presented to the research community. The NATO research group AVT-201 was formed to meet this challenge and build on pr...

The flow around the KVLCC2 model tanker hull at 0°, 12° and 30° drift is investigated using classical Reynolds Averaged Navier–Stokes (RANS) models from two different proprietary codes, hybrid RANS-LES models from one of these proprietary codes, and Large Eddy Simulation (LES) models from a third, semi-proprietary code. Understanding the three-dime...

Aerodynamic integration of diverterless air intakes with increasingly compact serpentine shaping and the optimization of their performance as well as engine/intake compatibility are challenging tasks for innovative design of advanced unmanned aerial vehicles (UAVs) featuring superior combat or reconnaissance abilities. Within the Aerodynamics Actio...

Accurate estimations of control effectiveness are crucial for flight mechanical model development to assess controllability. Any deficiency in the design should be corrected at an early stage. An increased interest in Unmanned Combat Aerial Vehicles (UCAV) has put focus on the controllability of low observable platforms with highly sweep delta wing...

Aerodynamic integration of air intakes and the optimization of their performance are challenging tasks for innovative design of advanced unmanned aerial vehicles (UAVs). The extension of Computational Fluid Dynamics (CFD) into application areas such as dynamic intake distortion prediction and thus engine/intake compatibility is made possible by mod...

Current combat Unmanned Aerial Vehicles (UAVs) are being designed for a new threat environment demanding low observability and stealth capabilities, as well as for weight requirements. These aircraft are designed to minimize the overall radar cross section presented to enemy radar installations. Nevertheless, the desire to hide the engine face from...

The next generation of low signature, highly manoeuvrable unmanned combat aerial vehicles (UCAV) will challenge the aerodynamic design of the intake system. To avoid radar detection, the intake duct needs to be aggressively curved to hide the engine, which may lead to loss of total pressure. The GARTEUR group AG-46 was formed to meet this challenge...

Aerodynamic integration of air intakes with increasingly compact shaping and the optimization of their performance are challenging tasks for innovative design of advanced unmanned aerial vehicles (UAVs) featuring superior combat or reconnaissance abilities. In order to meet configurational requirements, diverterless intake designs with optimized en...

Three independent studies from the United States (NASA), Sweden (Swedish Defense Research Agency), and Australia (Defense Science and Technology Organization) are analyzed to assess the state of current unstructured grid computational fluid dynamic tools and practices for predicting the complex static and dynamic aerodynamic and stability character...

Establishing the ability to accurately predict static and dynamic stability characteristics of air and sea vehicles using Computational Fluid Dynamics (CFD) methods could revolutionize the vehicle design process for NATO air and sea vehicles. A validated CFD capability would significantly reduce the number of ground tests required to verify vehicle...

The subject of UCAV design is an important current topic. Many countries have their own programmes. An International group is under the initiative of the NATO RTO-AVT-161 Task group (assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles -essentially complex configurations). The assessments need to include the absolute...

This paper is via the initiative of the NATO RTO-AVT-161 Task group. The group is aimed at assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles (essentially complex configurations). The assessments need to include the absolute values of forces and moments as well as the various symmetric and asymmetric stability deri...

Within the NATO RTO Task Group AVT-161, the vortical flow above a UCAV, named SACCON, has been analyzed with both experimental and computational means. This paper presents the results of the numerical investigation using the FOI developed flow solver Edge. Static and dynamic data is compared to the experimental investigation using a RANS, URANS and...