ESDU 70015
Fluid forces and moments on flat plates.
Amended in Release 202403 (Jul 2024).
Abstract:
ESDU 70015 gives information on the variation with incidence of the normal forces and centre of pressure positions for thin plates of various shapes. The data are presented in terms of nondimensional mean force coefficients. Within the accuracy of these data, tangential forces due to surface friction may be neglected at all incidences. For plates normal to the flow, information is also given on the effects of turbulence and Reynolds number and of perforating the plate and, for rectangular plates, the effects of mounting a plate on a surface and of a velocity profile in the flow are considered. The forces on pairs of identical plates, normal to the flow, are also given.Indexed under:
 Air Brakes
 Annular Plates
 Centre of Pressure
 Circular Plates
 Dive Brakes
 Elliptical Plates
 Normal Force
 Perforated Plates
 Pitching Moment
 Rectangular Plates
 SemiElliptical Plates
 Shear Flow
 Square Plates
 Triangular Plates
 Turbulence
 Velocity Profile
 Wind Speed
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Data Item ESDU 70015  

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This Data Item contains 14 interactive graph(s) as listed below.
Graph  Title 

Figure 1  C_{N} for rectangular plates normal to uniform stream, Re > 10^{3} 
Figure 2  Effect of Re on C_{N} for flat plates normal to flow 
Figure 3a  Effect of turbulence on C_{N} 
Figure 3b  Effect of turbulence on C_{N} 
Figure 4  Normal force coefficient for two identical, thin plates in series, normal to flow, Re > 10^{3} 
Figure 5  Normal force coefficient for uniformly perforated thin plates, normal to stream, Re > 10^{3} 
Figure 6  Normal force coefficient for circular plates with a single central hole, normal to stream, Re > 10^{3} 
Figure 7a  Normal force coefficient for surfacemounted rectangular plates in uniform flow 
Figure 7b  Normal force coefficient for surfacemounted rectangular plates in uniform flow 
Figure 8  Variation of C_{N} with b/c and α for all plate shapes, b/c ≥ 2 
Figure 9  Variation of centre of pressure position with b/c and α, rectangular and elliptical plates, b/c ≥ 2 
Figure 10  Variation of C_{N} with b/c and α for all plate shapes, b/c ≤ 2 
Figure 11  Variation of centre of pressure position with b/c and α, rectangular and elliptical plates, b/c ≤ 2 
Figure 13  Centre of pressure position for triangular plate with apex leading 