Lift and drag of a NACA 0015 airfoil fitted with five differently shaped endplates are measured at M = .114 and M = .15 while sweeping the angle of attack from-4 to 14 degrees at 2 degree increments. The triangular endplate performs well in enhancing lift, while reducing induced drag better than the other endplates. A scaled down version of the airfoil and endplates are run in a flow visualization water tunnel at 10 degrees angle of attack and 1 fps. The triangular endplate causes upwash aft of the airfoil, which cancels out some of the natural downwash due to angle of attack, thus decreasing drag.
Outside vapor deposition has been studied experimentally, and the deposition process parameters have been examined. The system consisted of an industrial-type burner and a cylindrical bait rod. The following aspects of this process were studied: 1) the temperature prome of the bait rod surface, 2) the deposition efficiency measured in terms of the mass of deposited SiO,, and 3) the size distribution of the deposited particles. The maximum bait rod surface temperature was, as expected, at the stagnation point. The temperature on the surface dropped rapidly along the axis of the bait rod away from the stagnation point; this is expected to innuence the thermophoretic deposition rate. The particle size distribution shows that the particle diameters are near 0.2 pm and above.
LIST OF FIGURES vi NOMENCLATURE ix CHAPTER I. INTRODUCTION 1 1.1 Background 1 1.2 Previous Related Research 5 II. EXPERIMENTAL INVESTIGATION OF DYNAMIC STALL 9 2.1 Experimental Objectives 9 2.2 Test Facility 9 2.3 Flow Visualization 13 2.4 Pressure Distributions and Integrated Forces .... 17 2.5 Strain Gage Measurements 23 III. DISCUSSION OF RESULTS 29 3.1 Aerodynamic Loads 29 3.2 Flow Visualization Data 33 3.3 Pressure Distributions 44 3.4 Empirical Correlations 49 IV. ANALYTICAL METHODS AND RESULTS 4.1 Discussion of Analytical Model . .• 4.
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