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History of Rensselaer Polytechnic Institute, 1824-1934

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INDEX 289 Physical Culture, 162; Profes- sors of, Appendix XIII. Physics, course established, 148, 218; curriculum of,…
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290 INDEX Repair fund, 201. Repeaters, Instructors called, 96. Research, bulletin, 218; by pro- fessors and students, 176…
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INDEX 291 South Carolina, Exposition, 1% ; University of, science early taught in, 2. Southern California Alumni As-…
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292 INDEX Uniform of students in 1850-54 Union College, Physics early taught in, 2 ; President Nott of, 66. Union…
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prizes at, 183. Wright, Professor John, 114 Yale College, Chair of Chem- struction in science, 2. ciation, 133. Young Men’…

Jet-flapped airfoils in ground proximity

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PROJECllUBEFLIOHl
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TR AE 6804 JET-FLAPPED AIRFOILS IN GROUND PROXIMITY by George C. Cooke IV This research was supported jointly by the…
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ACKNOWLEDGMENT This study was supported jointly by the U. S. Department of Transportation under Contract C-117-66 (NEG) and…
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SUMMARY This paper concerns the subsonic lift characteristics of airfoils in ground proximity with and without trailing edge…
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TABLE OF CONTENTS Page ACKNOWLEDGMENT ii SUMMARY iii 1. INTRODUCTION 2 II. SYMBOLS III. ANALYSIS A. Development of…
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2 I. INTRODUCTION Recently the jet-flapped airfoil has attracted new interest because of its potential capabilities as a…
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a linearized potential flow model. Strand and Brainerd (Ref. 8) have developed the small-disturbance equations for arbitrary…
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4 II. SYMBOLS Physical Variables x,y physical coordinates c airfoil chord h airfoil height or clearance above ground…
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5 Non-Dimensional Variables x = x C dummy x variable h 1- c ground clearance ratio ~ = Ys..~)( "'41t C…
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III. ANALYSIS The following analysis consists of four parts. In Part A the physical problem of supercritical flow over a jet-…
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7 compressibility effects. In addition a thin-jet approximation is made. Following Spence, the jet-flap flow field is modeled…
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8 The exact analysis above yields a pair of nonlinear integro-differ- ential equations. These equations are not only…
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which, when placed as in Figure 2, has an associated flow field that satisfies linearized tangency conditions on the airfoil…
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1'J and = } c < Xo (6) are therefore the first approximation or limiting case for small angles of attack,…
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The term + ~(x .. ) '" e in the above equations results when v is evalua- ted at Yo = 0 and is given by = A…
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12 B. Investigation of Vortex Distribution Singularities One method of solving equations (14) and (15) is to represent the…
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Likewise (15) can be rewritten as ~ rx;:.I" I Ie. 1/ I d + ~ V7;;" 1F ;: (;. (~) G ()(j X", J.) X o I…
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14 Substitution of the boundary condition on the initial deflection of the jet flap (7) gives " J ~. (x) dX…
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15 done in Appendix B where it is shown that as x_ 00 II o ("?:J ~. (x) - (24) and / o (~3) ,;;. (X) - (25)…
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It was noted in Part B that, except for the rates at which Ii (~) and );,. lX} vanish as x .... - , the vortex distribution…
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