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Peripheral jets : effect of exit geometry

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0..- a:O .30 .25 .15 .10 .05 .30 I o M = 1.58 )( I ()3 SW G IFT.- SEC. ~ ~ = 2.39 II 10-3 .25 .20 .15 .10 .05 .…
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0..- " aP .30 o M = 1.56 II 10-3 SLUG IFT.-SEC . 8. JIt1 :: 239 It 10-3 ,. " .25 .20 .15 .10 .05 00 .0…

Peripheral jets and plenum chambers : an exact potential flow analysis

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G. C. COOKE IV PHERIPHERAL JETS AND PLENUM CHAMBERS AN EXACT POTENTIAL FLOW ANALYSIS
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WF5TRZTW - TR AE 6811 PERIPHERAL JETS AND PLENUM CHAMBERS. AN EXACT POTENTIAL FLOW ANALYSIS by George C. Cooke IV This…
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ACKNOWLEDGMENT The author wishes to express his appreciation to Dr. Robert Duffy, Associate Professor of Aeronautical…
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SU~y This report presents the results of a potential flow study for air cushion devices in hovering. The emphasis here is on…
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ACKNOWLEDGMENT SUMMARY SYMBOLS INTRODUCTION ANALYSIS DISCUSSION CONCLUSIONS REFERENCES FIGURES TABLE OF CONTENTS iii…
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SYMBOLS BPR = 1'.-1' .. H-"p .. Cd = tflh 2.J Cj =~ e 0. "T; Cq = 'V IVa = tflt d = h - t~ h…
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x,y z = x+ iy 0( oc.f C!)=r O(~- 90· A ~ 4' t/J SUBSCRIPTS a b e geometric coordinates complex coordinate…
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INTRODUCTION The assumption is made in many studies of air cushion supports that the flow direction at the nozzle exit plane…
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2 incompressible and has a uniform total pressure. Figure 1 shows the domain of the flow being considered in the physical…
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In the first transformation the logarithm of 1; is taken. The rectangular domain into which ~(~;) is mapped can then be…
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4 Numerical analysis is best carried out in the A -plane. In terms of A, the complex coordinate is given by (7) where the…
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Equations (9) and (10) give hit once (8) has been solved and C c has been evaluated from (11). As the clearance is…
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6 The term "l't(~N) was evaluated numerically from (8) after first integrating by parts iTh order to replace the…
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if flow separation occurs. For inward deflected jets Figures 10 and 11 show a greater jet reaction both parallel and normal to…
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~k -I Cd = [r + t \"'i.< ( ()(~ - ;}:) to", (]J) d" } (17) o A plot of (17) is given in Figure 20.…
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are possible with the type II nozzle as opposed to the type I nozzle. Whether or not higher base pressure are achieved in…
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REFERENCES 1. Strand, T., "Exact Inviscid Incompressible Flow Theory of Static Peripheral Jets in Proximity to the…
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11 --- . Z=X+IY h ATMOSPHERE BASE REGION Va E GROUND Fig. 1. Physical Plane
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12 -v Fig. 2. Hodograph Plane o E o Fig. 3. Potential Plane
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13 1m A K' 1 B C D ~ Re ~ I .. ~ :1 ,. K Fig. 4. A Plane f d 1 h f GROUND Fig. 5. Simple Plenum Chamber…
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TYPE x ...] = 0 t < < < ( TYPE II I ~y x « « c t ,< < e t c « < c GROUNO ('«CCt""…
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1.0 .6 2 o 2 type I type II Fig. 7. Base 4 Clearance Pressure vs 6 hit 8
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1.0 .6 o 2 4 type I type II Fig. 8. Flow Coefficient vs Clearance 6 hit 8
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