ESDU 74013-1974 A method for estimating drag-rise Mach number at zero incidence of smooth or bumpy non-ducted axisymmetric bodies without or with fins.
ESDU 74013 gives a method of predicting when the shock first appears downstream of the point of maximum cross section@ either on first being formed or on moving from an upstream station. It has been observed experimentally that this condition corresponds to the rapid increase in shock-wave drag. The fins are taken into account as distributed cross-sectional area to give an equivalent body@ and the method relies on computing an incompressible velocity distribution from the body geometry. Comparison of the method with experimental data shows it predicts the drag-rise Mach number to within 0.015.
ESDU 74013-1974 history
1974ESDU 74013-1974 A method for estimating drag-rise Mach number at zero incidence of smooth or bumpy non-ducted axisymmetric bodies without or with fins.