Arrow Dynamics

Degenerate Cases of Conic Sections: Conics are formed when a plane and a double cone intersect. These intersections can form a variety of conics. These include: circles, parabolas, ellipses and hyperbolas. A circle can be formed from a cone if a plane intersects with the cone at an angle perpendicular to the base of the cone. This circle is also formed by the equation: (x-h)2+ (y-k)2=r2. This equation creates a relation because the collection of points does not pass the vertical line test. To…

A drill pipe non-return valve (NRV) is essential in MPD operations. A U-tube analogy demonstrates that any positive unbalance in the annulus will result in forcing fluid up the drill pipe. [4] Referred to as a float, the NRV is usually driven by a piston. During circulation, drilling fluid forces the valve open against the spring. When pumps are off the valve is closed through a combination of the spring and wellbore pressure. [2] Figure 2.7c Rig layout for MPD operations (KCA Deutag Source…

(3) Equation (3) gives limit moment about 11% higher than equation (2) regardless of h. One notable point is that the above solutions depend only on bend factor(h), not on r/t and R/r. Equations (1-3) are applicable only for the pure in-plane bending moment and the effect of internal pressure is not taken in to account. Also these analytical solutions consider constant wall thickness along the contour of the pipe bend cross section. However, the most of the pipe bends are made using a forming…

HYPOTHESIS The main hypothesis being investigated is that a more buoyant boat will have a higher velocity. It will encounter less water resistance as less of the hull is below the water. The secondary hypothesis is that the smaller the angle x, a surface is to the water, it will be able to skim and plane across the surface better, thus achieving greater speeds. The models of the boats will be further explained in the Methodology: Boat Design section. Experiment 1: Model A will have a velocity…

What chracterizes the axial flow turbine is its rotation axis. It could be placed vertically or horizontally to water surface. In this latter type the axis is parallel positioned to the incoming water stream. Also the generator can be submerged under water or non-submerged. This turbine is usually used as tidal energy converter. For small river use, the axis could be an angle inclined to the water stream. See figure \ref{Hydro_HorizontalAxis}. Hydrokinetic converters with a vertical axis…

The experiment of fluidization in packed column was determined by using air as the conveying media. The fluidized bed is when the air make the solid to behave like a fluid. For this experiment, two columns are use which one column are filled with sand and the other one filled with aluminum oxide. The bed height of aluminum oxide is 100 mm and have a particle size about 250 micron (mesh 60). The minimum fluidization velocity is used to determine the pressure drop. As mentioned above, when the…

3.3 Tribological properties of Cr-B-C-N coatings in artificial seawater Fig.10 shows the friction behaviors and the mean-steady friction coefficients of Cr-B-C-N coatings sliding against SiC balls in artificial seawater. As seen in Fig.10a, it is clear that the CrCN coatings showed higher friction coefficient than other coatings during the tribo-test in artificial seawater. The initial friction coefficient of CrCN coatings was 0.17, while that of CrBCN coatings ranged between 0.14 and 0.15. For…

A water jet cutter, commonly called a water jet, is a tool that uses a very high-pressure jet of water or a mixture of water and an abrasive to cut a wide variety of materials. A water jet that does not use abrasives is referred to as a pure water jet or water-only cutting [1]. For a pure water jet (Figure 1) the water is pressurized to the range of 20 - 94 ksi, 138 - 649 MPa at the inlet and forced through an orifice with a diameter of between 0.25 - 4 mm creating a very thin high velocity…

of elasticity and the theory of heat conduction. The two basic branches of elasticity, namely elastostatic and elastodynamics are developed under different thermodynamic assumptions. The problems of static are regarded as isothermal and those of dynamics are said to be adiabatic. Thermoelasticity unifies these two fields. The effect of the temperature field on the strain field is not a one-way phenomenon. The strain field also affects the temperature…

We are Swag Team 6, and it has been over two months since we were assigned our group. Significant progress was made in the duration of our formation, and within a short amount of time, the adversities we have overcame from where we began is impressive. As we came together initially, we were strangers from multiple different cultures with varying ideas and ways of going about our group. Our group was comprised of 3 Chinese students, and 3 American students. Nevertheless, even the Americans had…