Prediction of Surface Pressures during Water Impact

Nomenclature CD(X = drag coefficient assuming a constant entry velocity CP = pressure coefficient Cw = wetting factor, h/h' en = unit vector normal to the body surface h = model depth below effective planar surface h' — model depth below original surface A/z = increment in depth below the effective planar surface in successive steps t = time t*m — VEt/D, where t is time measured from initial model impact t* = VEt/d, where t is the length of time the element centroid has been submerged VE = entry velocity Bc = cone half angle 6 = entry angle (measured from the horizontal) = velocity potential