In this paper an attempt is made to study the Lift and Drag forces in a wind turbine blade for NACA4412 Airfoil profile is considered for analysis. In the present work, the numerical and experimentally analysis lift and drag performances of NACA 4412 airfoil at different attack angle for Reynolds numbers (Re) 3 ×105 by measuring
The purpose of this lab was to implement the use of a Scanning Electron Microscope (SEM) to examine and analyze metal samples that were subject to different failure tests. These failure tests included tensile tests, impact tests, and fatigue tests. SEM’s are useful because they provide a 3D view of the surface of the material, which improves the ability to examine the failure type at a microscopic level. In addition to this, the resolving power of a SEM is much stronger than that of a standard microscope, which enables the user to obtain much more detailed images of the samples. The experiment was performed by analyzing failure tested samples that were prepared before the experiment.
How does it Work? Electric power is produced when the blades move by the wind, more like a windmill. The speedier and consistently the wind will blow, the more electricity will be produced. The generated electricity is ‘plugged-in’ via inverter into your home’s standard mains supply. Remember, the wind turbine doesn't work as a “stand-alone” system.
The failure was caused by low cycle fatigue, which was initiated due the presence of exogenous type of inclusions in the pull rod. The de-cohesion of inclusions creates the development of micro cracks at the surface and caused the local stress concentration and of crack initiation and propagation along the inter dendritic region by fatigue mode (refer fig
The RF micro electro mechanical system (MEMS) strain sensor is fabricated by incorporating the multi split ring resonators . The bone mechanism is understood by means of bone formation and deformation. The normalized cross correlation computation using graphics processing unit is used to estimate the deformation of bone with reduced computation time when compared to 2-dimensional normalized cross correlation based algorithm . The strain occurs due to force, pressure, acceleration and sound is measured with the help of Micro scale strain gauges in Micro Electro-Mechanical Systems (MEMS) . The Analog to Digital Converter (ADC) designed with 0.18µm CMOS (Complementary Metal Oxide Semiconductor) technology in Mentor graphics.
Oil, one of the fossil fuels, is used in producing gasoline, jet fuel and diesel fuel. Oil is also used in producing electricity. Coal, another fossil fuel, is used in producing electricity as well. In addition to producing electricity, coal is used in producing steel and making cement. Natural gas is used in cooling homes and cooking.
Risk assessment through fault tree evaluation After the fault tree is constructed, both qualitative and quantitative evaluation can be performed. The constructed fault tree itself is a qualitative illustration of the events and relationships that lead to the top event and provides significant insights and understanding into the cause of system failure. The qualitative analysis is conducted from an algebraic point of view, also called logic analysis. Its principal purpose is to determine the structure function of the fault tree concerning the top event, primarily the minimal cut sets and minimal path sets. A cut set is a combination of basic events that can cause the top event; and thus a minimal cut set is the smallest combination of basic
In our project we would be using mostly winds generated by fast moving vehicles on a highway and may be local winds and planetary winds in some special case (i.e. storm). WHY VERTICAL AXIS WIND TURBINE? It is chosen due to the following advantages of this kind of turbine: No yawing mechanism is required because it can accept winds from all directions. The gearbox, generator etc.
1. Introduction Electrochemical impedance spectroscopy (EIS) is one of the oldest electroanalytical method which firstly proposed by the Randles in the middle and late 1940s. EIS has various advantages, among which some properties of this method such as non-destructive, sensitive and highly informative, distinguished it from other electrochemical methods. EIS technique can study the behavior of the electrode–electrolyte interfaces. Because of this fact that the surface properties of electrodes are a function of the electrolyte-electrode interface, this method can be used in the modern surface science and technology.