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Showing 1 to 9 of 9 for “"drag measurements"”.
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Drag Measurements on an Ellipsoidal Body
A drag study was conducted on an oblate ellipsoid body in the Virginia Tech Stability Wind Tunnel. Two-dimensional wake surveys were taken with a seven-hole probe and an integral momentum method was applied to the results to calculate the drag on the body. Several different model configurations …
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Experimental investigation into the reduction of supersonic skin-friction drag on a flat plate using transpiration and a cavity with mass addition
… evaluation of an operational facility for wall drag measurement and evaluation of the total drag of various wall configurations. The drag of three possible supersonic combustor wall configurations was measured to determine if reduction in skin friction and/or wave drag could be achieved through …
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Measuring cycling kinematics using a low-cost, flashing LED, multi-camera approach
… with power output measurement and wind tunnel drag measurements, the investigation of several different standard cycling positions is performed. The results indicate a significant component of out-of- plane joint motions, especially in the knee, with an average knee excursion between 0.15" and …
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Preliminary Test Predictions for Scale Ram-Air Parachute Testing
… the aerodynamic coefficients of lift (𝐶𝐿) and drag (𝐶𝐷) conducted in a wind tunnel. Additionally, a CFD approach where a steady-state parachute shape defined based on experiments, photographs, and literature, is presented. The accuracy of the simulation depends considerably on the ability to …
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Effect of Adaptive Tabs on Drag of a Square-Base Bluff Body
… of trailing edge tabulations to reduce drag in the Cal Poly 0.912m by 1.219 m low-speed wind tunnel. To accomplish this, the boundary layer was first measured on the trailing edge of the model for the three speeds at 10, 20, and 30 m/s, with Re = 8.3e4, 1.6e5 and 2.5e5 respectively, …
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Experimental Investigation of Active Wingtip Vortex Control Using Synthetic Jet Actuators
… of spanwise synthetic jet actuation (SJA) on the drag of a NACA 0015 semispan wing. The wing, which was designed and manufactured for this experiment, has an aspect ratio of 4.20, a span of 0.427 m (16.813”), and is built around an internal array of piezoelectric actuators, which work in series to …
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Experimental Investigation of Wind Loading on a Ducted Wind Turbine
… in the range of 1% to 16%. Fluctuating drag measurements were made using a multi axis load cell to record time averaged and unsteady duct behaviour. Surface pressure taps connected to the multi-channel pressure acquisition system helped in recording the mean and fluctuating pressures on …
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Pressure Disturbance Upstream of the Boundary Layer Data System
… surface pressure disturbance and pressure drag of various instrument excrescence shapes for a small aircraft flight test device called the Boundary Layer Data System (BLDS). Insights on pressure disturbance will serve as a guide for the placement of BLDS probes/sensors, and pressure drag …
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Experimental wind tunnel study of airfoils with large flap deflections at low Reynolds numbers
Lift, drag, and moment measurements were taken at low Reynolds numbers for four airfoils with trailing edge plain flaps in an attempt to understand the effects of Reynolds number, percent thickness (t/c), percent chord of flap (flap-chord ratio), and flap deflection on airfoil performance. The four …