Aerodynamics

While designing any aerodynamic body an unspoken assumption of bilateral or mirror symmetry is taken into consideration. Argument against this bilateral symmetry states that “once the velocity of sound is exceeded, the laws of aerodynamics change in such a way as to make it seem inadvisable to arrange the components of an airplane side by side or abreast in a supersonic stream unless there are compelling reasons for such an arrangement.“ 2.1.1 Wave Drag This type of drag is formed as a result of shock waves formed around an aircraft. Wave drag is the main reason behind the designing of oblique wings. This design has been found to reduce wave drag for a supersonic aircraft and can be believed as an aerodynamic evolution to swept wings on symmetric aircraft configurations. This wing is not symmetric at supersonic speeds, but rotates about a central pivot, which allows the maximum cross sectional area perpendicular to the flow to be half that of a similar symmetric design. The…

and Yousefi and Saleh investigated the effects of suction and blowing jet width on the aerodynamic characteristics of a NACA 0012 airfoil. They found that the jet width of about 3.5% ~ 4% of the chord length is optimum for tangential blowing, while for perpendicular blowing smaller jet widths are more efficient. 2.2 Control of flow around a NACA 0012 airfoil with a micro-riblet film by S.-J. Lee , Y.-G. Jang In the present study they studied about the flow structure of the wake behind a…

1- Summary This study is based on the analysis of pressure distribution around a NACA 23015 airfoil section with a flap of length equal to the 30% of the cord at different angles of incidence and flap settings. The experiment was performed in a non –return wind tunnel at a Reynolds number of 4.4×〖10〗^5 and at a Mach number of 0.073. It is of note that increasing incidence will increase lift produced until the critical angle of attack, where the airfoil stalls; moreover, deploying a flap will…

like that can have downforce on the order of 3G's, at 200mph. That means they could hang completely upside down on the track, and as long as they kept going fast enough, they would still stick to the road.There is a huge difference between a "spoiler" and an "airfoil" or wing. They have different shapes and do different things. An automotive airfoil is shaped like an upside-down airplane wing it deflects airflow upward to generate down-force on the rear of the vehicle. A spoiler is an…

number of 4.28 x 105 and Mach number of 0.07. The pressure distribution over the aerofoil was recorded and used to derive the coefficient of lift, pressure drag and pitching moment. Variations of these parameters with incidence and flap deflection were investigated. Thin aerofoil theoretical prediction of a 2π/radian lift curve, aerodynamic hysteresis and theoretical aerodynamic centre at 0.25C were examined. 1 Introduction The experiment investigates the characteristics of an aerofoil in a 2D…

Communication and Collaboration Information, Media and Technology Literacy Thinking Flexibly Thinking Interdependently Drag: air resistance that slows and object down. Drag is an opposing force of motion. Gravity: a force that pulls objects together, and the reason things on Earth fall down instead of up. Weight: (the gravitational force) the force of gravity pulling an object down. Lift: the force that pushes object upwards. Aerodynamics: the way air moves around things. Aerodynamic design…

diesel engines can get to the mark of 125 mph. And now we have entered the era of very fast bullet trains that can go up to 200 mph. As the speed of train increases, new issues arises. One of the biggest problems is air resistance (popularly known as Drag Force). At low speeds, we can neglect air friction but at high speed, this factor can’t be overlooked. This air resistance can be the cause of wastage of power. It can overcome by making the shape of locomotives aerodynamically sleek from the…

Most of the time, paper airplanes don’t exactly match other planes. They can either fly upwards, downwards, left, right, or sometimes even straight. No matter what type paper is used, it can never match a professional’s paper airplane. All of this is due to the design of the plane. For example, if the plane is perfectly built but has a round nose rather than a sharp nose, it won’t be able to fly far. The three factors that can make a good paper airplane are aerodynamics, gravity, and balance.…

side of it making sure the metals did not touch and had a wire running off the metal so the spark would jump between the pieces of metal. This mechanism was put into the PVC pipe and the end of the pipe was sealed with hot glue making sure the glue did not get onto the metal were the spark ran across. Modified procedure: Several issues arose in the preliminary investigation the most notable of which is the melting of the rocket itself. since a way to stop the plastic from melting is not known…

Drag force is an aerodynamic force which acts parallel and opposite to the motion of the object when it moves through a fluid. It is caused by friction and differences in air pressure. There are many factors can affect the magnitude of drag force as with aircraft lift. The drag depends linearly on the shape and size of the object moving through the air. The object’s cross-sectional shape determines the form drag which is created by the pressure variation around the object and affects the…