CFD Assignment Example | Topics and Well Written Essays - 1250 words

CFD - Assignment Example g for the small wind controlled turbines is not as essential as other factors since the passive over speeding regulates the smaller relative influences of the drag on the engine performance. The total improvement is measured by the cruise lift and the high-lift root of the airfoil to reduce the inboard solidity apart from enhancing the starting torque. The different aerofoil shapes have three possible cruise lift measures 0.1, 0.4 and 0.6. The velocity of the aerofoil increases with a steeper gradient from the beginning of the take-off and then the gradient gradually reduces as the aircraft stabilizes. With the airfoil positioned in the stream of air with the speed V∞, the air flow parts closer to the leading edge and then passes the upper surface and the lower surface of the airfoil at the same time. At that point, when the air flow splits up, the speed of the air flow reduces to 0, a point referred to as the point of stagnation. It is placed near the aerofoil leading edge, but the position changes in relation to the angle of attack (Bertin & Cummings 2009, p. 49). Pressure and Velocity have a significant effect on the performance of the aerofoil. It is found that in higher pressure zones, the velocity of the aerofoil is reduced because of strong turbulence. On the other hand, low pressure caused weak turbulence, enabling the aerofoil to experience faster cruise (Clancy 1975, p. 48). High pressure is required only in two conditions, during the takeoff and landing, where an air craft is expected to change altitude. Los speed id desired for safe landing and for climbing. The relationship between velocity and pressure is shown in figure 6 below. For the following explanations it is assumed, that a stream of air is directed against an airfoil, which is fixed in space (Houghton & Carpenter 2003, p. 83). This is equivalent to an airfoil moving through the air - just a question of the reference system. A typical wind tunnel works in the same way. The qualitative