The Optimization And Aerodynamic Characteristic Of Laminar Flow Airfoil S809

The objective of this exercise is to measure the pressure distribution across the surface on an aerofoil in a wind tunnel. The aerofoil is tested under several different Mach numbers from subsonic to supercritical. The purpose of measuring the pressure distributions is to assess the validity of the Prandtl-Glauert law and to discuss the changing chracteristics of the flow as the Mach number increases from subsonic to transonic.

The objective of this project paper is to develop an efficient numerical code, for the prediction of the aerodynamic characteristics of Turbosail type wind turbine. A vortex model has been treated based on the lifting line theory.

[2] Queen Mary University of London, DEN233, Low Speed Aerodynamics, Lecture Notes, 2013, (Accessed on 13th November 2013)

start from science call aerodynamic to decrease the vehicle “air resistance” to go faster until it brings into our daily life, nowadays a lot of our daily object we own include streamlining, it may not necessary streamlining but very curvy line organic line and so on. The reason why streamlining is around us because streamline gives us sleek, clean and modern look. For example, a sharp angle chair and curved chair, most of the time people would prefer curvy chair not only for how its look but also its comfortable and its ergonomics. Other than that, streamlining is not just a curve shape or an angle its actually speak thousands of words, same as on the graphic, its speak a lot for the graphic/

Admittedly, aircrafts have made valuable contributions to the field of transportation. From childhood, I have been genuinely captivated by the intricate engineering behind the design of space crafts, space shuttles and airplanes. Aerospace engineers often encounter a set of unique challenges as they apply mathematical and scientific knowledge to design and build such novel inventions. Of all the A-level subjects, Physics and Mathematics have always been my best suits. In essence, Physics relates physical phenomena using simplified formulas and theories while Mathematics provides the basis of solving complex problems. In particular, I learnt and appreciated how to relate theory to calculations while studying Mathematics at A-level in the mechanics module. When combined, the A-level science subjects have offered me valuable insights into the field of aerospace engineering.

In CFD simulation, it is easier to optimize and change certain features in the design rather than changing the shape of prototype in the wing tunnel tests. This is a significant advantage as it leads to a reduction in time. Also, CFD can simulate and optimize sub-components, which are affected by the flow of air at high

     Drag force is the cost of increasing downforce. Drag force is the force acting on an object in motion in the opposite direction the object is moving through a fluid (Yager). To most people drag force is simply known as air resistance. The objective of aerodynamic efficiency is to maximize downforce while minimizing drag force.

Abstract— The paper deals with the 2-D lid-driven cavity flow governed by the non dimensional incompressible Navier-Stokes theorem in the rectangular domain. Specific boundary conditions for this case study have been defined and the flow characteristics pertaining to the scenario have been coded in MATLAB using artificial compressibility method and FTCS scheme. The results are compared successfully with an authentic research paper by Ghia, Ghia & Shin.

[2] Kinnas, Dynamic Viscosity of Air as a Function of Time, http://www.ce.utexas.edu/prof/kinnas/319lab/Book/CH1/PROPS/GIFS/dynair.gif Accessed on 15/04/2013

One of the requirements for this course is an Aircraft Performance Research Project that entails planning a flight from Denver International Airport (KDEN) to Chicago O'Hare International Airport (KORD) for a given aircraft, weather conditions, and assumptions. The objective is to apply what has been learned throughout this course. Drawing on aeronautics theory and using the performance charts and equations presented in the course, each student is to answer a sequence of questions that step through the planning process. Remember, as with all of the exercises, all work (calculations) must be shown as much as possible. After all of the questions have been answered, the next

In this case I used the values 1.8, 2, 2.2, 2.4, 2.6, 2.8, 3, 3.2 and described in the table below.

During my childhood, I was surprised to see an object flying in air. Later, I had tried to fly in air, by jumping from heights, but I couldn’t. This situation made me find the reason for my failure that we can move through water without boats by swimming and we can move on land without automobiles by walking. But I come to know that we cannot fly in air without machines. This thought inspired me most and made me curious in studying in the fields of aeronautical and aerospace, which results me to take the profession of aeronautical engineer.

As CFD techniques have been developed over the recent years, LES becomes one of the widely used turbulence closure to simulate turbulent flows of engineering interests. However, one of the main challenges in computational wind engineering and using CFD simulations via LES turbulence closure is generating appropriate inflow fluctuation at inlet that is representing the real-world ABL wind

Over the past decades, the laminar and turbulent unsteady viscous flow behind a circular cylinder has been the subject of numerous experimental and numerical studies. Flow past a bluff body like the circular cylinder usually experiences very strong flow oscillations and boundary layer separation in the wake region behind the body. In certain Reynolds number range, a periodic flow motion will develop in the wake as a result of boundary layer vortices being shed alternatively from either side of the cylinder. For assessing the ability of computational flow solving software to reproduce real flow conditions flow around a cylinder is an excellent case because of simplicity of the geometry and the complex nature of flow around the body. The flow regimes can be divided based on the Re and the behavior of the flow around the cylinder in these regimes as Steady axisymmetric regime (20 < Re < 210), Steady planar-symmetric regime (210 < Re < 270), Unsteady planar-symmetric regime (270 < Re < 400), Unsteady asymmetric regime (400 < Re < 1000), Turbulent wake regime (Re > 1000). One of the most important but unsolved problem in the area of engineering and sciences are Turbulence. Solving the time dependent three-dimensional Navier stokes equation might give a complete description of turbulent flows but with the available computers are not capable enough to solve for the required length and time

The lid-driven cavity flow is most probably one of the most studied fluid problems in the