The Advantages And Disadvantages Of Computational Fluid Dynamics (C.) Methods

As a result of the experiment and computation of data, the aerofoil was found to have a critical Mach number of M=0.732. Below this freestream Mach number the Prandtl-Glauert law predicted results very

As the global supply of fossil fuels becomes steadily lower, need is growing for new energy sources that are beneficial to the environment and cost-effective. Wind power is one solution to this need. Wind turbines require significant investment, but are cost-efficient in the long term. If construction of turbines is sufficiently increased, the wind may be able to in the future provide a very major portion of global energy.

In this experiment, the velocity profile for a flat plate at zero pressure gradient of a boundary layer at two different stream wise points were acquired. The investigation was also based on and how changes in Reynolds number affect the velocity distribution within boundary layers. Parameters such as the Momentum Thickness, Displacement Thickness, Shape Factor, shear stress and coefficient of friction was also calculated to gain a better understand of boundary layers. The experimental values calculated were compared to the theoretical Blasius for laminar flow and Power Law Solutions for turbulent flow to see how they varied. It was found out the higher the Reynolds number the greater the boundary layer thickness. As the

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

This report is a compilation of my work done with Bombardier Aerospace during the tenure of my Internship in Summer 2017, a requisite for MEng Aerospace being pursued at Concordia University. The aim of this internship was to implement Exhaust Nozzle Simulation using AIAA Dual Separate Flow Reference Nozzle.

CFD concentrates to quantify internal flow physics, use of commercial codes and creating in house codes. Thermo acoustics and other configurations are investigates under alternative engine study to increase power density and enhance reliability. Extension of operation life, high temperature abilities and engine performance are focused in advanced materials research.

If you’ve ever been outside, you know that air flows in a somewhat chaotic and unpredictable way, even if its overall tendencies are well understood. This means that wings and propellers need to be tested in wind tunnels in order to get a precise set of efficiency values. In layman's terms, we can say that the efficiency of a propeller varies depending on how fast air is traveling over the propeller versus how fast the tips of the propellers are spinning. In aeronautics and marine hydrodynamics, this ratio is called the “advance ratio”. {include image like

First trials considered analyzing the profile at 0.75H from the exit of the simulator (Figure 3.6 (a)). However, the wind profiles obtained at this location were non homogeneous, and repeated experiments never gave the same results, as the measuring distance was too close to the inlet. Accordingly, the wind profiles at farther distances were measured (Figure 3.6 (b)). The profile got better shape than the previous one in the case of matching the open terrain wind profile. The wind profiles at 1.5H and 2H were also measured (‎Figure 3.7). It can be seen that a more developed boundary layer is resulted by increasing the distance from the exit of open-jet simulator. For instance, the experimental results show that the profile at distance 2H is the best match to the open terrain wind profile until the point corresponding to in vertical

Alternatively, it can also be explained by referring to the equation , where the k value is constant while the hydraulic gradient i defined by i = ΔH/L increases because the head difference ΔH is constant while the flow length L becomes shorter when it gets closer to the barrier wall.

Kites for centuries have been an interesting object of flight fascinating people all over the world. The standard diamond kite can be made at home simply with 2 wooden dowels, plastic sheeting, strong tape, twine and a kite string or fishing line. Considering kites are simple and easy to make, at home you can also design it whatever way you like. It’s become an unpopular activity for as you can see technology has advanced, but today I’ll be presenting to you the history and aerodynamics on kites before the advancement of technology and a more scientific approach.

Turbine-governor model GAST is an obsolete model that should not be used in interconnection-wide dynamics cases. The GAST model is “really only applicable for GE Frame 5 machines” .

-The protractor of the aerofoil connected to the lift and drag voltmeters was then used to vary the aerofoil’s angle of attack from 0° to 20°. Lift and Drag voltage values measured for each angle were recorded and calibration coefficients of 6.7 and 6.4 were used to obtain force Newton values for lift and drag. The lift and drag forces obtained for each angle were then plugged into equations (3) and (4) to obtain lift and drag coefficients. Equation (5) was used to calculate a theoretical value for the lift coefficient.

Along with these benefits come many practical difficulties associated with offshore wind projects. Offshore projects are expensive, particularly when paralleled with those projects which are land-based. The surface of ocean is a harsh place to maintain and build these structures. Due to this reason, high winds that carry larger amounts of energy threaten the steadiness of wind turbines which causes installation to become much more rigorous and costly. Furthermore, it also fetches the need for monitoring which is an expensive and automated system for maintenance. Underwater topography presently describes the viability of installation as most current models use foundations rooted directly into sea beds that are shallow.

We are facing an energy crisis on Earth. Burning fossil fuels are harming the atmosphere; this global warming and affects produces chemicals that hurt our body. People are starting to think about using alternative energy. Wind power would be our first choice, because it’s clean, inexhaustible and renewable. Today, wind power is mainly used in Europe. We believed wind power would be the main source of alternative energy for world use.

Deal, 2010, ‘Wind Power: An Emerging Energy Resource’, Technology and Engineering Teacher, pp. 9-15, viewed on September 12, 2011, retrieved from: http://search.proquest.com/docview/853062621/fulltextPDF/13255EC175479D10C7A/1?accountid=42518