New Numerical and Measurements Flow Analyses Near Radars

Abstract

An experimental and numerical investigation of the flow near a blunt body has been conducted in this study. Most experimental methods of flow studies use flow visualization and probes introduction into the flow field. The main goal of this research was the development of a new methodology to analyze flows, and to measure flow characteristics without taking into account the distorting effects of measuring probes. A series of experiments were performed on a ground surveillance radar in the Price-Païdoussis subsonic wind tunnel. Forces and moments were measured as functions of wind speeds and angular positions by the use of a six-component aerodynamic scale. A Computational Fluid Dynamics three-dimensional model was employed to analyze the wake region of the ground surveillance radar. A turbulence reduction system was proposed and analyzed in this research. The use of the proposed turbulence reduction system was found to be an effective way to reduce turbulent flow intensity by 50%, drag coefficients by 9.6%, and delay the flow transition point by 7.6 times.

New Validation Methodology of an Adaptive Wing for UAV S45 for Fuel Reduction and Climate Improvement

“…The working section is the most critical part of a wind tunnel as that is where the effects of the flow of the wing prototypes are measured. An important step before testing is the calibration of the test chamber that contains the studied model so that the flow conditions inside it can be monitored [21]. The main parameters to describe the flow in a wind tunnel are the total pressure, the static pressure, the dynamic pressure, the temperature, the flow speeds, and the Reynolds number [22].…”

Experimental wind-tunnel study of the dynamics of inverted foils for energy harvesting

“…The experimental tests were performed in the Price-Païdoussis (P-P) subsonic wind tunnel of the Research Laboratory in Active Controls, Avionics and Aeroservoelasticity (LARCASE). New methodologies in the aeronautical field have been developed at the LARCASE, including computational fluid dynamics (CFD) model validations with experimental results from subsonic wind tunnel tests [21][22][23][24][25][26][27][28][29][30].…”