The aerodynamics characteristics of a blended-wing body (BWB) aircraft were obtained in Universiti Teknologi MARA low speed wind tunnel. The scaled-down of BWB model consisted of a canard as its horizontal stabilizer. There were four canards with different aspect ratio used in the experiments. Canard setting angles were varied from -20 to 20 . All tests were conducted at velocity of 35 m/s, wit...

This paper puts forward an aerodynamic design method to improve the high-speed performance of aircraft with low-aspect-ratio tailless configuration. The can ameliorate longitudinal moment characteristics configuration by designing and collocating key section airfoils constrains fixed parameters planform shape capacity. Firstly, effect twisting wing, fore-loading aft-reflexing on is evaluated hi...

Three-dimensional numerical simulations using FLUENT [1] were performed to model the airflow over the Sunseeker, an award-winning solar car that was designed and built at Western Michigan University. Converged numerical solutions on three different grids are reported and compared with the available experimental data, which include the lift and the drag coefficients. Also reported are the result...

In order to improve the energy capture performance of vertical axis lift wind turbines in a low speed environment, drag turbine is employed couple with design existing turbines. contrast literature, this work, computational model proposed that can simulate interaction between and fluid. The effects pitch angle (β), installation (θ), overlap ratio (ε) diameter (DL) on hybrid are systematically a...

An orthogonal experiment was conducted to study the effects of aspect ratio, camber fore wing, and gap ratio front rear wing panels on hydrodynamic performance double-vane otter boards. The design comprised three factors (each having levels), namely (1.0, 1.5, 2.0), (0.12, 0.14, 0.16), (0.25, 0.30, 0.35), drag coefficient Cx lift Cy nine board models obtained in a wind tunnel experiment, lift–d...

For golfers, the length of flight distance is very important for improving scores. Therefore, surface a golf ball provided with innumerable dents called dimples to improve distance. These can be characterized by dimple occupancy and volume ratio. we manufactured model balls in which was changed diameter number dimples, depth change Fifteen were designed using 3D CAD then printed. Using these ba...

To improve the low aerodynamic efficiency and reduce high energy consumption of a single-stage circulation control wing, multistage wing was designed. By combining force measurement particle image velocimetry (PIV), flow-field characteristics an aerofoil were investigated with respect to increase in number blowing slots, changes coefficient, different ratios for three slots. The results reveale...

The purpose of this study is to improve the aerodynamic performance of wind turbine blades, using the Ball-Spine inverse design method. The inverse design goal is to calculate a geometry corresponds to a given pressure distribution on its boundaries. By calculating the difference between the current and target pressure distributions, geometric boundaries are modified so that the pressure di...

Extensive experimental investigations of hydrofoil-assisted catamarans have identified the main hydrodynamic parameters affecting the performance of these vessels. Design principles of existing vessels are discussed in the light of these hydrodynamic findings. The experience gained from experimental testing has provided the basis for the development of a non-linear vortex lattice method for des...