Using data on leaf area density and wind profiles above and within canopies of wheat,rice,soybean and corn,thecenter-of-pressure method (CPM),originally proposed by Thom (1971),is first validated in the field.Aphysically-based model for directly calculating zero-displacement height (d) is ...
The center of pressure of a projectile is caused to move upon the occurrence of an event that changes the static margin, such as the jettisoning of a body previously attached to the projectile, as noted above. In particular embodiments, this is achieved by a flare disposed toward the rear ...
The center of gravity and the center of pressure are assumed to be in body axes. While this block has the ability to output forces and/or moments in the stability axes, the blocks in the Equations of Motion library are currently designed to accept forces and moments in either the body or...
Extensive airload measurements have been obtained during wind tunnel testing of a pressure-instrumented model of the UH-60A Black Hawk helicopter main rotor. The test included level flight, descent, and hover conditions, and was conducted at the Duits Netherlands Windtunnel as part of a joint aco...
For purposes of discussion, it is convenient to consider the aerodynamic force on an airfoil (see illustration). The net resultant aerodynamic forceRacting through the center of pressure on the airfoil represents mechanically the same effect as that due to the actual pressure and shear stress loads...
aerodynamic lift,lift- the component of the aerodynamic forces acting on an airfoil that opposes gravity force- (physics) the influence that produces a change in a physical quantity; "force equals mass times acceleration" Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton ...
Peak-to-peak pressure (Pa) DBTC : Distance between the track center (m) F y : Side force (N) F z : Vertical force (N) f ΔQ : Relative windward wheel unloading factor h : Specific enthalpy k : Turbulent kinetic energy M COG : Moment due to the lateral movement of the...
pressure contour over configuration and pressure coefficient on the wing.The results show that the aerodynamic center moves backward slightly and then reverses heavily with the increase of sweep angle in the same Mach number.With the increase of flight Mach number,the aerodynamic center moves forward...
Pressure-sensitive paint (PSP) and video model deformation (VMD) systems have been installed in the Unitary Plan Wind Tunnel at the NASA Langley Research Center to support the supersonic wind tunnel testing requirements of the High Speed... GE Erickson,AW Burner,R Deloach - NASA Langley Techni...
1) aerodynamic center 气动中心 1. This paper has analyzed and calculated the influence of external ZC-1 scout equipment on the lift coefficient, damp coefficient and aerodynamic center of the fighter plane. 从外挂对载机气动特性影响的计算方法出发,分析了现役某型战机外挂ZC-1航空侦察吊舱对载机...