منابع مشابه
Aerodynamics of Race Cars
Race car performance depends on elements such as the engine, tires, suspension, road, aerodynamics, and of course the driver. In recent years, however, vehicle aerodynamics gained increased attention, mainly due to the utilization of the negative lift (downforce) principle, yielding several important performance improvements. This review briefly explains the significance of the aerodynamic down...
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Performance of a simplified Quad Tiltrotor (QTR) is studied in ground effect using CFD. The rotor systems are modeled in a time averaged sense using source terms for the forces in the momentum equations. Viscous body conforming overset meshes are used to model all the solid surfaces of the vehicle. The background Cartesian grid is used to specify the far-field boundary conditions and transfer i...
متن کاملTransonic and supersonic ground effect aerodynamics
A review of recent and historical work in the field of transonic and supersonic ground effect aerodynamics has been conducted, focussing on applied research on wings and aircraft, present and future ground transportation, projectiles, rocket sleds and other related bodies which travel in close ground proximity in the compressible regime. Methods for ground testing are described and evaluated, n...
متن کاملComputational Study of Rotorcraft Aerodynamics in Ground Effect and Brownout
When helicopters operate close to the ground in desert conditions, the rotor wake can entrain large amounts of dust into the flow field surrounding the aircraft. This entrainment of dust can result in the potentially dangerous condition known as brownout where the pilot loses situational awareness. Understanding the physics that governs the entrainment of dust from the ground may eventually all...
متن کاملAerodynamics and Optimization of Airfoil Under Ground Effect
The Prediction of aerodynamic characteristics and shape optimization of airfoil under the ground effect have been carried out by integration of computational fluid dynamics and the multiobjective Pareto-based genetic algorithm. The main flow characteristics around an airfoil of WIG craft are lift force, lift-to-drag ratio and static height stability (H.S). However, they show a strong trade-off ...
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ژورنال
عنوان ژورنال: Applied Mechanics Reviews
سال: 2006
ISSN: 0003-6900,2379-0407
DOI: 10.1115/1.2110263